One embodiment of the present invention provides a raw copper material having a porosity in the range of 60-90%. The porosity is measured by loading the raw copper material in a container and is calculated by the following formula 1. [Formula 1] Porosity = (Volume of total voids / Volume of container) X 100
One embodiment of the present invention provides a raw copper material comprising an iron (Fe) element in the range of 5 to 1000 ppm. The iron (Fe) element is measured using an inductively coupled plasma (ICP) analysis method.
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, wherein the copper foil has a first weight retention rate of 0.1% or less, and a second weight retention rate of 0.3% or less.
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, wherein the copper foil has a first weight retention rate of 0.1% or less, and a second weight retention rate of 0.3% or less. The first weight retention rate is calculated by Equation 1 below, [Equation 11 first weight retention rate=1(weight after 5 hr immersion-weight before immersion)/weight before immersion*1001. The second weight retention rate is calculated by Equation 2 below, [Equation 21 second weight retention rate=1(weight after 24 hr immersion-weight before immersion)/weight before immersion*1001.
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
C25D 1/20 - Separation of the formed objects from the electrodes
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
COPPER FOIL CAPABLE OF PREVENTING TEAR OR WRINKLE DEFECTS, ELECTRODE COMPRISING THE SAME, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD FOR MANUFACTURING THE SAME
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, wherein the copper foil has a first stress factor in a range of 2.8 to 3.2, a second stress factor in a range of 2.5 to 3.0, and a third stress factor in a range of 3.5 to 4.5, and a method for manufacturing the copper foil. The first stress factor is calculated by Equation 1, [Equation 11 first stress factor=A/A'+B/B'+C/C' the second stress factor is calculated by Equation 2, [Equation 21 second stress factor=A/B+K/B', and the third stress factor is calculated by Equation 3 below, [Equation 31 third stress factor=A/C+A'/C', wherein A in Equation 1 is a stress at 50% elongation in a machine direction (MD direction), A' in Equation 1 is a stress at 50% elongation in a transverse direction (TD direction), B in Equation 1 is a stress at 10% elongation in the MD direction, B' in Equation 1 is a stress at 10% elongation in the TD direction, C in Equation 1 is a stress at 5% elongation in the MD direction, and C' in Equation 1 is a stress at 5% elongation in the TD direction. In addition, according to another embodiment of the present disclosure, there is provided an electrode including the copper foil and a secondary battery including the same.
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
C25D 1/20 - Separation of the formed objects from the electrodes
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, wherein the copper foil has a room temperature MIT 1 of 280 or more, a high-temperature MIT 1 of 130 or more, a room temperature MIT 2 of 14 or more, and a high-temperature MIT 2 of 25 or more. The room temperature MIT 1 refers to an MIT number when a bending radius (R) is 0.38 mm at room temperature, the high-temperature MIT 1 refers to an MIT number when a bending radius (R) is 0.38 mm after heat treatment at 190° C. for one hour, the room temperature MIT 2 refers to an MIT number when a bending radius (R) is 0.1 mm at room temperature, and the high-temperature MIT 2 refers to an MIT number when a bending radius (R) is 0.1 mm after heat treatment at 190° C. for one hour.
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, wherein the copper film has an A-value in a range of 1.1 to 1.6. “A” is calculated by Equation 1 below,
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, wherein the copper film has an A-value in a range of 1.1 to 1.6. “A” is calculated by Equation 1 below,
A
=
P
/
Q
[
Equation
1
]
wherein “P” in Equation 1 is a peak intensity at 1650 cm−1 of the copper film, “Q” in Equation 1 is a peak intensity at 1460 cm−1 of the copper film, and the peak intensity is measured by Fourier-transform infrared spectroscopy (FT-IR).
COPPER FOIL CAPABLE OF PREVENTING TEAR OR WRINKLE DEFECTS, ELECTRODE COMPRISING THE SAME, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD FOR MANUFACTURING THE SAME
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, wherein the copper foil has a first stress factor in a range of 2.8 to 3.2, a second stress factor in a range of 2.5 to 3.0, and a third stress factor in a range of 3.5 to 4.5, and a method for manufacturing the copper foil.
Provided in one embodiment of the present invention is a copper foil comprising a copper film, which comprises 99.9 wt% or more of copper, wherein the copper film has an A value of 1.1-1.6. A is calculated by the following relation 1, [Relation 1] A = P / Q, P in relation 1 is the peak intensity at 1,650 cm-1, of the copper film, Q in relation 1 is the peak intensity at 1,460 cm-1, of the copper film, and the peak intensities are measured by FT-IR. Provided in one embodiment of the present invention is the copper foil and a manufacturing method therefor, the copper foil comprising a copper film, which comprises 99.9 wt% or more of copper and has a first stress coefficient of 2.8-3.2, a second stress coefficient of 2.5-3.0 and a third stress coefficient of 3.5-4.5. The first stress coefficient is calculated by relation 2, [relation 2] first stress coefficient = A/A' + B/B'+C/C'. The second stress coefficient is calculated by relation 3, [relation 3] second stress coefficient = A/B + A'/B'. The third stress coefficient is calculated by relation 4, [relation 4] third stress coefficient = A/C + A'/C'. A in relation 2 is stress at 50% elongation in MD, A' in relation 2 is stress at 50% elongation in TD, B in relation 2 is stress at 10% elongation in MD, B' in relation 2 is stress at 10% elongation in TD, C in relation 2 is stress at 5% elongation in MD, and C' in relation 2 is stress at 5% elongation in TD. In addition, provided in another embodiment of the present invention is an electrode comprising the copper foil, and a secondary battery comprising same.
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23F 11/18 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
10.
COPPER FOIL, ELECTRODE COMPRISING THE SAME, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD FOR MANUFACTURING THE SAME
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, wherein the copper film has an A-value in a range of 1.1 to 1.6. "A" is calculated by Equation 1 below, [Equation 11 A=P/Q wherein "P" in Equation 1 is a peak intensity at 1650 cm-1 of the copper film, "Q" in Equation 1 is a peak intensity at 1460 cni1 of the copper film, and the peak intensity is measured by Fourier-transform infrared spectroscopy (FT-IR).
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
C25D 1/20 - Separation of the formed objects from the electrodes
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, wherein the copper foil has a room temperature MIT 1 of 280 or more, a high-temperature MIT 1 of 130 or more, a room temperature MIT 2 of 14 or more, and a high-temperature MIT 2 of 25 or more. The room temperature MIT 1 refers to an MIT number when a bending radius (R) is 0.38 mm at room temperature, the high-temperature MIT 1 refers to an MIT number when a bending radius (R) is 0.38 mm after heat treatment at 190 C for one hour, the room temperature MIT 2 refers to an MIT number when a bending radius (R) is 0.1 mm at room temperature, and the high-temperature MIT 2 refers to an MIT number when a bending radius (R) is 0.1 mm after heat treatment at 190 C for one hour.
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
C25D 1/20 - Separation of the formed objects from the electrodes
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
COPPER FOIL CAPABLE OF PREVENTING DEFECTS OF TEAR OR WRINKLE THEREOF, ELECTRODE COMPRISING THE SAME, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD FOR MANUFACTURING THE SAME
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, wherein the copper film has a room temperature loss factor of 0.05 or less, wherein the room temperature loss factor is calculated by Equation 1 below,
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, wherein the copper film has a room temperature loss factor of 0.05 or less, wherein the room temperature loss factor is calculated by Equation 1 below,
room temperature loss factor=room temperature loss modulus/room temperature storage modulus. [Equation 1]
H01M 4/134 - Electrodes based on metals, Si or alloys
13.
COPPER FOIL CAPABLE OF PREVENTING DEFECTS OF TEAR OR WRINKLE THEREOF, ELECTRODE COMPRISING THE SAME, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD FOR MANUFACTURING THE SAME
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, wherein the copper film has a room temperature loss factor of 0.05 or less, wherein the room temperature loss factor is calculated by Equation 1 below, [Equation 11 room temperature loss factor=room temperature loss modulus/room temperature storage modulus.
COPPER FOIL WITH HIGH STRENGTH AND HIGH ELONGATION, ELECTRODE COMPRISING THE SAME, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD FOR MANUFACTURING THE SAME
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, and a protective layer formed on the copper film, wherein the copper foil has a room temperature puncture strength in a range of 5.0 N to 7.0 N, and a high-temperature puncture strength in a range of 8.0 N to 12.5 N. At this time, the high-temperature puncture strength is a puncture strength measured after heat treatment at 190 C for one hour.
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
C25D 1/20 - Separation of the formed objects from the electrodes
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
According one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, and a protective layer formed on the copper film, wherein the copper foil has a tensile strength index of 3.0 kgf/mm2 or less, and an elongation index of 2.1% or less.
H01M 10/0567 - Liquid materials characterised by the additives
16.
COPPER FOIL WITH HIGH STRENGTH AND HIGH ELONGATION, ELECTRODE COMPRISING THE SAME, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD FOR MANUFACTURING THE SAME
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, and a protective layer formed on the copper film, wherein the copper foil has a room temperature puncture strength in a range of 5.0 N to 7.0 N, and a high-temperature puncture strength in a range of 8.0 N to 12.5 N. At this time, the high-temperature puncture strength is a puncture strength measured after heat treatment at 190° C. for one hour.
An embodiment of the present invention provides a copper foil that comprises: a copper film including 99.9 wt% or more of copper; and a protective layer on the copper film, and has a room-temperature puncture strength in the range of 5.0-7.0 N, and a high-temperature puncture strength in the range of 8.0-12.5 N. Here, the high temperature puncture strength is the puncture strength measured after heat treatment at 190°C for 1 hour. An embodiment of the present invention provides a copper foil that comprises: a copper film including 99.9 wt% or more of copper; and a protective layer on the copper film, and has a room-temperature water contact angle in the range of 60-70°, and a room-temperature surface resistivity in the range of 2.4-2.7 mΩ/cm. An embodiment of the present invention provides a copper foil that comprises a copper film including 99.9 wt% or more of copper and has a color difference coefficient in the range of 0.38-0.7 based on the Lab colorimetric system. An embodiment of the present invention provides a copper foil that comprises a copper film including 99.9 wt% or more of copper and has a room-temperature MIT1 of 280 or more, a high-temperature MIT1 of 130 or more, a room-temperature MIT2 of 14 or more, and a high-temperature MIT2 of 25 or more.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23F 11/18 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, and a protective layer formed on the copper film, wherein the copper foil has a room temperature water contact angle in a range of 60° to 70°, and a room temperature surface resistivity in a range of 2.4 mΩ/cm to 2.7 mΩ/cm.
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film having 99.9 wt % or more of copper, wherein the copper foil has a color difference coefficient in a range of 0.38 to 0.7 based on the Lab color system.
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, and a protective layer formed on the copper film, wherein the copper foil has a room temperature water contact angle in a range of 600 to 70 , and a room temperature surface resistivity in a range of 2.4 mffcm to 2.7 mffcm.
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film having 99.9 wt% or more of copper, wherein the copper foil has a color difference coefficient in a range of 0.38 to 0.7 based on the Lab color system. The color difference coefficient is calculated by Equation 1 below, [Equation 11 color difference coefficient=lcolor difference (E") after stretching-color difference (E') before stretchingl wherein the color difference (E') before stretching of Equation 1 is calculated by Equation 2 below, [Equation 21 color difference (E') before stretching= [(L*1)2+(a*1)2+(3*1)211/2 wherein L*1 in Equation 2 refers to L* before stretching, a*1 in Equation 2 refers to a* before stretching, and b*1 in Equation 2 refers to b* before stretching, and the color difference (E") after stretching of Equation 1 is calculated by Equation 3 below, [Equation 31 color difference (E") after stretching= [(L*2)2+(a*2)2+(b*2)211/2 wherein L*2 in Equation 3 refers to L* after stretching, a*2 in Equation 3 refers to a* after stretching, and b*2 in Equation 3 refers to b* after stretching.
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, and having an R value in a range of 2.0 to 3.5.
One embodiment of the present invention relates to a copper foil comprising a copper film, which contains 99.9 wt% or more of copper, and having an R value of 2.0-3.5. R is calculated by relation 1, [relation 1] R = log(WA/WB)/log(tA/tB). WA in relation 1 is calculated by relation 2, [relation 2] WA = [XA0+(XA45)X2+XA90]/4. WB in relation 1 is calculated by relation 3, [relation 3] WB = [XB0+(XB45)X2+XB90]/4. tA in relation 1 means the thickness of a specimen before a tensile test, tB in relation 1 means the thickness of the specimen after a tensile test, XA0, XA45 and XA90 in relation 2 mean respective widths of the central part, in the direction of tension before applying tension, of specimens collected in 0°, 45° and 90° directions, and XB0, XB45 and XB90 in relation 3 mean respective widths of the central part, in the direction of tension after applying tension, of the specimens collected in 0°, 45° and 90° directions. One embodiment of the present invention relates to the copper foil comprising a copper film, which contains 99.9 wt% or more of copper, the copper film having a room-temperature loss coefficient of 0.05 or less, wherein the room-temperature loss coefficient is calculated by relation 4. [Relation 4] room-temperature loss coefficient = room-temperature loss modulus/room-temperature storage modulus
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23F 11/18 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
An embodiment of the present invention provides a copper foil that comprises: a copper layer containing more than 99.9 weight% copper; and a protective layer on the copper layer, and has a tensile strength index of 3.0 kgf/mm2 or less and an elongation index of 2.1% or less. The tensile strength index is calculated according to the following equation 1, [Equation 1] Tensile Strength Index = |Tensile Strength 2 - Tensile Strength 1|. In equation 1, tensile strength 1 is a tensile strength of a sample before the salt spray test, tensile strength 2 is a tensile strength of the sample after the salt spray test. The elongation index is calculated according to the following equation 2, [Equation 2] Elongation Index = |Elongation 2 - Elongation 1|. In equation 2, elongation 1 is an elongation rate of a sample before the salt spray test and elongation 2 is an elongation rate of the sample after the salt spray test. The salt spray test is conducted over 72 hours in 6 cycles with 5±1% NaCl, where 1 cycle consists of spraying for 2 hours at 35±2℃ followed by drying for 10 hours. An embodiment of the present invention provides a copper foil comprising 99.9 weight% or more of copper, with a first weight retention rate of 0.1% or less and a second weight retention rate of 0.3% or less. The first weight retention rate is calculated according to the following equation 3, [Equation 3] First Weight Retention Rate = |(Weight after 5hr immersion - Weight before immersion)/Weight before immersion X 100|, and the second weight retention rate is calculated according to the following equation 4. [Equation 4] Second Weight Retention Rate = |(Weight after 24hr immersion - Weight before immersion)/Weight before immersion X 100|.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23F 11/18 - Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, and having an R value in a range of 2.0 to 3.5. R is calculated by Equation 1 below, [Equation 11 R = log (WA / WB) / log (tA / tB) wherein WA in Equation 1 is calculated using Equation 2 below, [Equation 21 WA = [XAO + (XA45) X 2 + XA90] / 4 WB in Equation 1 is calculated using Equation 3 below, [Equation 31 WB = [XBO + (XB45) X 2 + XB90] / 4 tA in Equation 1 means a thickness of a specimen before a tensile test, tB in Equation 1 means a thickness of the specimen after the tensile test, XAO, XA45, and XA90 in Equation 2 mean widths of central portions of specimens, which are collected in directions of 0 , 45 , and 90 , respectively, in a stretching direction before stretching, and XBO, XB45, and XB90 in Equation 3 mean widths of the central portions of the specimens, which are collected in directions of 0 , 45 , and 90 , respectively, in the stretching direction after the stretching.
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
C25D 1/20 - Separation of the formed objects from the electrodes
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
According one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt% or more of copper, and a protective layer formed on the copper film, wherein the copper foil has a tensile strength index of 3.0 kgf/mm2 or less, and an elongation index of 2.1% or less. The tensile strength index is calculated by Equation 1 below, [Equation 11 tensile strength index = Itensile strength 2 - tensile strength 11 wherein, tensile strength 1 in Equation 1 is a tensile strength of a sample before a salt spray test, and tensile strength 2 in Equation 1 is a tensile strength of the sample after the salt spray test. The elongation index is calculated by Equation 2 below, [Equation 21 elongation index =lelongation 2 - elongation 11 wherein elongation 1 in Equation 2 is an elongation of the sample before the salt spray test, elongation 2 in Equation 2 is an elongation of the sample after the salt spray test. The salt spray test is performed for a total of 72 hours by spraying a 5 1% NaC1 solution on the copper foil for 6 cycles, wherein 1 cycle means that the solution is sprayed at a temperature of 35 2 C for 2 hours and then is dried for 10 hours.
C23C 22/00 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
C23F 17/00 - Multi-step processes for surface treatment of metallic material involving at least one process provided for in class and at least one process covered by subclass or or class
C25D 1/20 - Separation of the formed objects from the electrodes
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
The present disclosure relates to a metal foil core including a winding member around which a metal foil is wound, a first protrusion member protruding from the winding member in a first direction (direction of arrow FD) of a first axis direction (X-axis direction), a second protrusion member protruding from the winding member in a second direction (direction of arrow SD) opposite to the first direction (direction of arrow FD) of the first axis direction (X-axis direction), and a first inducing groove formed in the first protrusion member to be disposed between both ends of the first protrusion member in the first axis direction (X-axis direction).
B65D 85/672 - Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
The present disclosure relates to a metal foil core including a winding member around which a metal foil is wound, a first protrusion member protruding from the winding member in a first direction (direction of arrow FD) of a first axis direction (X-axis direction), a second protrusion member protruding from the winding member in a second direction (direction of arrow SD) opposite to the first direction (direction of arrow FD) of the first axis direction (X-axis direction), and a first inducing groove formed in the first protrusion member to be disposed between both ends of the first protrusion member in the first axis direction (X-axis direction).
B65D 85/672 - Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
An apparatus for manufacturing copper foil is provided, including: a negative electrode drum on which a copper foil is electrodeposited, a positive electrode plate electrically connected with the negative electrode drum through an electrolyte, a positive electrode body configured to support the positive electrode plate, and a winding unit configured to wind the copper foil supplied from the negative electrode drum, wherein the positive electrode plate includes a base unit coupled to the positive electrode body, a connecting unit coupled to the positive electrode body to overlap a portion of the base unit, and a base fastening unit coupling the base unit to the positive electrode body, the connecting unit includes a covering member disposed to overlap the base unit and an inclined member inclined with respect to the covering member, and the covering member covers the base fastening unit between the base fastening unit and the negative electrode drum.
An apparatus for manufacturing copper foil is provided, including: an electrodeposition unit to electrodeposit a copper foil and a winding unit to wind the copper foil supplied therefrom, wherein the electrodeposition unit includes a negative drum and a positive electrode unit electrically connected thereto, the positive electrode unit includes a positive electrode body spaced apart from the negative drum, a plurality of positive electrode plates disposed on a surface of the positive electrode body, and a plurality of fastening units fastening each of the positive electrode plates to the positive electrode body, including first and second positive ones of the positive electrode plates coupled to the positive electrode body by first and second ones of the fastening units, and the second positive electrode plate includes a covering member that covers the first fastening member and a coupling member into which the second fastening member is inserted.
An apparatus for manufacturing a copper foil is provided including a winding unit configured to wind copper foil from an electrodeposition unit including a negative electrode drum on which copper foil is electrodeposited and a positive electrode electrically connected thereto via an electrolyte, the positive electrode includes an electrode body spaced apart from the negative electrode drum, a plurality of electrode plates disposed on a surface thereof, and a plurality of fastening units fastening each electrode plate thereto, the electrode plates including a base plate coupled to the positive electrode body between left and right ends thereof, first and second electrode plates coupled to opposing sides of the base plate and spaced apart from each other, the base plate coupled to the electrode body via a base fastening member, the first and second electrode plates partially overlapping the base plate to cover the base fastening member.
The present disclosure relates to an apparatus for manufacturing a copper foil including a negative electrode drum on which a copper foil is electrodeposited in an electroplating method using an electrolyte, a positive electrode plate electrically connected with the negative electrode drum through the electrolyte, a positive electrode body configured to support the positive electrode plate, and a winding unit configured to wind the copper foil supplied from the negative electrode drum, wherein the positive electrode plate includes a base unit coupled to the positive electrode body, a first connecting unit coupled to the positive electrode body to overlap a portion of the base unit, and a base fastening unit coupling the base unit to the positive electrode body, the first connecting unit includes a first covering member disposed to overlap the base unit and a first inclined member extending to be inclined with respect to the first covering member, and the first covering member is disposed to cover the base fastening unit between the base fastening unit and the negative electrode drum.
The present disclosure relates to an apparatus for manufacturing a copper foil including an electrodeposition unit configured to electrodeposit a copper foil in an electroplating method using an electrolyte and a winding unit configured to wind the copper foil supplied from the electrodeposition unit, wherein the electrodeposition unit includes a negative electrode drum on which the electrodeposited copper foil is electrodeposited in the electroplating method using the electrolyte and a positive electrode unit electrically connected with the negative electrode drum through the electrolyte, the positive electrode unit includes a positive electrode body spaced apart from the negative electrode drum, a plurality of positive electrode plates disposed on an upper surface of the positive electrode body, and a plurality of fastening units fastening each of the positive electrode plates to the positive electrode body, the positive electrode plates includes a base positive electrode plate coupled to the positive electrode body to be disposed between a left end of the positive electrode body and a right end of the positive electrode body, a first positive electrode plate coupled to one side of the base positive electrode plate, and a second positive electrode plate coupled to the other side of the base positive electrode plate to be spaced apart from the first positive electrode plate, the base positive electrode plate is coupled to the positive electrode body by a base fastening member among the fastening units, the first positive electrode plate partially overlaps the base positive electrode plate to cover the base fastening member, and the second positive electrode plate partially overlaps the base positive electrode plate at a position spaced apart from the first positive electrode plate to cover the base fastening member.
The present disclosure relates to an apparatus for manufacturing a copper foil including an electrodeposition unit configured to electrodeposit a copper foil in an electroplating method using an electrolyte and a winding unit configured to wind the copper foil supplied from the electrodeposition unit, wherein the electrodeposition unit includes a negative electrode drum on which an electrodeposited copper foil is electrodeposited in the electroplating method using the electrolyte and a positive electrode unit electrically connected with the negative electrode drum, the positive electrode unit includes a positive electrode body spaced apart from the negative electrode drum, a plurality of positive electrode plates disposed on an upper surface of the positive electrode body, and a plurality of fastening units fastening each of the positive electrode plates to the positive electrode body, a first positive electrode plate among the positive electrode plates is coupled to the positive electrode body by a first fastening member among the fastening units, a second positive electrode plate among the positive electrode plates is coupled to the positive electrode body by a second fastening member among the fastening units, and the second positive electrode plate includes a second covering member disposed on an upper surface of the first positive electrode plate to cover the first fastening member and a second coupling member into which the second fastening member is inserted.
The present disclosure relates to an apparatus for accommodating copper foil. The apparatus includes an accommodation body having an accommodation space which accommodates copper foil wound on a core, a support portion coupled to the accommodation body and configured to support both ends of the core, and an elastic member disposed between the support portion and the core and configured to support the core. Here, the elastic member includes a body portion, a plurality of first protrusions arranged on a top surface of the body portion and extending in a longitudinal direction of the core, and a plurality of second protrusions arranged on a bottom surface of the body portion and extending in a direction perpendicular to the extending direction of the plurality of first protrusions. Accordingly, vibrations may be buffered in a frequency band of vibrations occurring in a transportation process.
B65D 85/672 - Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
B65D 81/107 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using blocks of shock-absorbing material
36.
COPPER FOIL WITH ANTI-WRINKLE PROPERTY, ELECTRODE COMPRISING SAME, SECONDARY BATTERY COMPRISING SAME, AND MANUFACTURING METHOD THEREFOR
Provided in one embodiment of the present disclosure is a copper foil, which comprises a copper layer having a matte surface and a shiny surface, and an anticorrosive film arranged on the copper layer, and has a residual stress of 0.5-25 MPa on the basis of the absolute value thereof, wherein the copper layer comprises copper and carbon (C), the amount of carbon (C) in the copper layer is 2-20 ppm, the copper layer has a plane (111), a plane (200), a plane (220) and a plane (311) including crystalline particles, the ratio of the diffraction intensity of the plane (220) to the sum of the diffraction intensities of the plane (111), the plane (200), the plane (220) and the plane (311) is 10-40%, and the crystalline particles of the plane (220) have an average particle size of 70-120 nm at room temperature.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
An embodiment of the present disclosure provides an electrolytic copper foil, which comprises a copper layer and has a valley mean roughness of 0.8 to 12.5, a texture coefficient of (220) face (TC(220)) of 0.49 to 1.28, a tensile strength of 25 to 51 kgf/mm2, and a weight deviation in lateral direction of 3% or less.
H01M 4/70 - Carriers or collectors characterised by shape or form
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
38.
Electrolytic copper foil capable of preventing tearing or wrinkle defects, electrode containing same, secondary battery containing same, and method for manufacturing same
The present disclosure relates to an apparatus for accommodating copper foil. The apparatus includes an accommodation body in which an accommodation space for accommodating copper foil wound on a core is provided, a first support portion coupled to the accommodation body to support one side of the core, a second support portion coupled to the accommodation body to support the other side of the core, a first damper portion coupled to the first support portion to be disposed between the first support portion and the one side of the core, and a second damper portion coupled to the second support portion to be disposed between the second support portion and the other side of the core, wherein the first damper portion includes a first damper body coupled to the first support portion and a plurality of first damper protrusions protruding from the first damper body.
B65H 75/14 - Kinds or types of circular or polygonal cross-section with two end flanges
H01M 4/76 - Containers for holding the active material, e.g. tubes, capsules
B65D 85/672 - Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
B65D 81/02 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
B65D 25/10 - Devices to locate articles in containers
40.
ELECTROLYTIC COPPER FOIL OF HIGH STRENGTH, ELECTRODE COMPRISING THE SAME, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD OF MANUFACTURING THE SAME
Disclosed herein is an electrolytic copper foil including a copper layer, wherein the copper layer includes a (220) surface, and an orientation index M(220) of the (220) surface is one or more.
The present invention relates to an apparatus for accommodating copper foil. The apparatus includes an accommodation body having an accommodation space which accommodates copper foil wound on a core, a support portion coupled to the accommodation body and configured to support both ends of the core, and an elastic member disposed between the support portion and the core and configured to support the core. Here, the elastic member includes a body portion, a plurality of first protrusions arranged on a top surface of the body portion and extending in a longitudinal direction of the core, and a plurality of second protrusions arranged on a bottom surface of the body portion and extending in a direction perpendicular to the extending direction of the plurality of first protrusions. Accordingly, vibrations may be buffered in a frequency band of vibrations occurring in a transportation process.
B65D 85/672 - Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
The present invention comprises: a storage body having a storage space in which copper foil wound on a core is received; a support part coupled to the storage body to support the opposite ends of the core; and an elastic member disposed between the support part and the core to support the core, wherein the elastic member comprises a body portion, a plurality of first protrusions arranged at the upper surface of the body portion and extending in the longitudinal direction of the core, and a plurality of second protrusions arranged at the lower surface of the body portion and extending in a direction perpendicular to the extension direction of the first protrusions. Therefore, vibration damping can be achieved in the frequency band of vibration occurring in the transportation process.
B65D 85/672 - Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
B65D 81/107 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using blocks of shock-absorbing material
F16F 15/04 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means
43.
Electrolytic copper foil, method for manufacturing the same, and anode for lithium secondary battery of high capacity
The present invention relates to a copper foil current collector having superior adhesion to an active material of a Li secondary battery. The electrolytic copper foil of the present invention having a first surface and a second surface comprises: a first protective layer at the first surface; a second protective layer at the second surface; and a copper film between the first and second protective layers, wherein an oxygen-containing part at the second surface has a thickness (OT) of not less than 1.5 nm. According to the present invention, an electrolytic copper foil current collector for a Li secondary battery, which has low electric resistance and high adhesion to an active material, can be provided.
An embodiment of the present invention provides an electrolytic copper foil, which comprises a copper layer and has a valley mean roughness of 0.8-12.5, a texture coefficient of (220) face (TC (220)) of 0.49-1.28, a tensile strength of 25-51 kgf/mm2, and a weight deviation in lateral direction of 3% or less.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulatorsProcesses of manufacture thereof
C23C 22/24 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing hexavalent chromium compounds
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
Provided in one embodiment of the present invention is a copper foil, which comprises a copper layer having a matte surface and a shiny surface, and an anticorrosive film arranged on the copper layer, and has a residual stress of 0.5-25 MPa on the basis of the absolute value thereof, wherein the copper layer comprises copper and carbon (C), the amount of carbon (C) in the copper layer is 2-20 ppm, the copper layer has a plane (111), a plane (200), a plane (220) and a plane (311) including crystalline particles, the ratio of the diffraction intensity of the plane (220) to the sum of the diffraction intensities of the plane (111), the plane (200), the plane (220) and the plane (311) is 10-40%, and the crystalline particles of the plane (220) have an average particle size of 70-120 nm at room temperature.
C25D 3/38 - ElectroplatingBaths therefor from solutions of copper
C25D 5/48 - After-treatment of electroplated surfaces
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 22/24 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing hexavalent chromium compounds
The present invention relates to a storage device for copper foil, the storage device comprising: a storage body provided with a storage space for storing copper foil wound on a core; a first support part coupled to the storage body to support one side of the core; a second support part coupled to the storage body to support the other side of the core; a first damper part coupled to the first support part so as to be disposed between the first support part and the one side of the core; and a second damper part coupled to the second support part so as to be disposed between the second support part and the other side of the core, wherein the first damper part includes a first damper body coupled to the first support part and a plurality of first damper protrusions protruding from the first damper body.
B65D 85/672 - Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
B65D 81/02 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
ELECTROLYTIC COPPER FOIL CAPABLE OF PREVENTING TEARING OR WRINKLE DEFECTS, ELECTRODE CONTAINING SAME, SECONDARY BATTERY CONTAINING SAME, AND METHOD FOR MANUFACTURING SAME
One embodiment of the present invention provides an electrolytic copper foil including a copper layer and having a weight deviation of 5% or less in the width direction calculated by following Equation 1, a tensile strength of 25 to 62 kgf/mm 2, and a valley depth to thickness (VDT) of 3.5 to 66.9 calculated by following Equation 2. [Equation 1] Weight deviation (%) in the width direction = (Standard deviation of weight/arithmetic mean of weight)Х100 [Equation 2] Valley depth to thickness (VDT) = [Thickness of electrolytic copper foil]/[Maximum valley depth of roughness profile (Rv)]
Disclosed are an electrolytic copper foil the fold and/or wrinkle of which can be avoided or minimized during a roll-to-roll process, a method for manufacturing the same, and an electrode and a secondary battery which are produced with such electrolytic copper foil so that high productivity can be guaranteed. An electrolytic copper foil of the disclosure has a longitudinal rising of 30 mm or less and a transverse rising of 25 mm or less, and the transverse rising is 8.5 times the longitudinal rising or less.
The present invention relates to an electrolytic copper foil having excellent handling characteristics in the manufacture of copper foil and in post-processing for manufacturing a secondary battery. The present invention provides an electrolytic copper foil having a first surface and a second surface, wherein the texture coefficient of the (220) plane of the electrolytic copper foil is 0.4-1.32, the difference (|Δ(Rz/Ra)|) between Rz/Ra on the first surface and Rz/Ra on the second surface, of the electrolytic copper foil, is less than 2.42, and the difference (|ΔPD|) in peak density (PD) between the first surface and the second surface, of the electrolytic copper foil, is 96 ea or less.
2) (here, peak density is measured according to ASME standard B46.1). The electrolytic copper foil has a high adhesiveness to a negative electrode material and a low electrical resistance can be provided by controlling the surface properties of the electrolytic copper foil surface.
H01M 4/70 - Carriers or collectors characterised by shape or form
51.
Copper foil free from generation of wrinkles, electrode comprising the same, secondary battery comprising the same and method for manufacturing the same
Disclosed is a copper foil including a copper layer having a matte surface and a shiny surface, and an anticorrosive layer disposed on the copper layer, wherein the copper foil has a residual stress of 0.5 to 25 Mpa, based on absolute value, and the copper layer has a plurality of crystal planes, wherein a ratio [TCR (220)] of a texture coefficient (TC) of (220) crystal plane of the copper layer to a total of texture coefficients (TC) of (111), (200), (220) and (311) crystal planes of the copper layer is 5 to 30%.
H05K 1/09 - Use of materials for the metallic pattern
H05K 3/02 - Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
H01M 50/534 - Electrode connections inside a battery casing characterised by the material of the leads or tabs
H01M 4/02 - Electrodes composed of, or comprising, active material
53.
Electrolytic copper foil having high tensile strength, electrode including the same, secondary battery including the same, and method of manufacturing the same
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
54.
Copper foil with minimized bagginess, wrinkle or tear, electrode including the same, secondary battery including the same and method for manufacturing the same
H05K 3/02 - Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
Copper foil with minimized bagginess and tear, electrode comprising the same, secondary battery comprising the same and method for manufacturing the same
H05K 3/02 - Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
56.
Copper foil having improved workability and charge/discharge characteristics, electrode including the same, secondary battery including the same and method for manufacturing the same
Disclosed is a copper foil including a copper layer having a matte surface and a shiny surface, wherein the copper foil has a first surface of a direction of the matte surface of the copper layer and a second surface of a direction of the shiny surface of the copper layer, wherein a dynamic friction coefficient of the first surface is designated by μk1 and a dynamic friction coefficient of the second surface is designated by μk2. A ratio of three-dimensional surface area to two-dimensional surface area of the first surface is designated by Fs1, a ratio of three-dimensional surface area to two-dimensional surface area of the second surface is designated by Fs2.
C23C 22/37 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH < 6 containing fluorides or complex fluorides containing also hexavalent chromium compounds
An electrolytic copper foil for a lithium secondary battery, which is applied as a negative electrode current collector of a lithium secondary battery, wherein when a correlation between a thermal treatment temperature of the electrolytic copper foil for a lithium secondary battery, which corresponds to a variable x, and an elongation increment ratio of the electrolytic copper foil for a lithium secondary battery, which corresponds to a variable y, is expressed as y=ax+b (100≤x≤200) on an x-y two-dimensional graph, the “a” value is in the range of 0.0009 to 0.0610.
H01M 4/134 - Electrodes based on metals, Si or alloys
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
H01M 4/02 - Electrodes composed of, or comprising, active material
59.
Electrolytic copper foil, current collector comprising the same, electrode comprising the same, secondary battery comprising the same, and method for manufacturing the same
An electrolytic copper foil for a lithium secondary battery, wherein a curl indicator C of the electrolytic copper foil, which is defined as 1.21ΔR+1.12ΔCr+0.01ΔG, is 0 or above and 4.0 or below, where ΔR corresponds to an absolute value of a difference between roughness measured on a first surface of the electrolytic copper foil for a lithium secondary battery and roughness measured on a second surface thereof, ΔCr corresponds to an absolute value of a difference between a chrome-deposited amount of an anti-corrosion layer formed on the first surface of the electrolytic copper foil for a lithium secondary battery and a chrome-deposited amount of an anti-corrosion layer formed on the second surface, and ΔG corresponds to an absolute value of a difference between glossiness measured on the first surface of the electrolytic copper foil for a lithium secondary battery and glossiness measured on the second surface.
An electrolytic copper foil for a lithium secondary battery, which is applied as a negative electrode current collector of a lithium secondary battery, wherein after a thermal treatment at 300° C. for 30 minutes, the electrolytic copper foil for a lithium secondary battery has an elongation of 5% to 30%.
H01M 4/02 - Electrodes composed of, or comprising, active material
63.
Easily handleable electrolytic copper foil, electrode comprising the same, secondary battery comprising the same, and method for manufacturing the same
H01M 4/68 - Selection of materials for use in lead-acid accumulators
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulatorsProcesses of manufacture thereof
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFySelection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
An electrolytic copper foil capable of securing a secondary battery having a high capacity retention rate, an electrode including the same, a secondary battery including the same, and a method of manufacturing the same. The electrolytic copper foil, which includes a first surface and a second surface opposite to the first surface, includes a copper layer including a matte surface facing the first surface and a shiny surface facing the second surface, and a first protective layer on the matte surface of the copper layer, wherein the first protective layer includes chromium (Cr) and the first surface of the electrolytic copper foil has an adhesion factor of 1.5 to 16.3.
B21C 37/00 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape
C25D 7/00 - Electroplating characterised by the article coated
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
65.
Electrolytic copper foil capable of improving capacity retention rate of secondary battery, electrode including the same, secondary battery including the same, and method of manufacturing the same
An electrolytic copper foil capable of improving a capacity retention rate of a secondary battery, an electrode including the same, a secondary battery including the same, and a method of manufacturing the same. The electrolytic copper foil, which includes a first surface and a second surface opposite the first surface, includes a copper layer including a matte surface facing the first surface and a shiny surface facing the second surface, and a first protective layer on the matte surface of the copper layer, wherein the first surface has a peak density (PD) of 3 to 110, a texture coefficient [TC(220)] of a (220) plane of 1.32 or less, and a surface roughness (Rz) of 0.5 to 2.7 μm.
An electric copper foil is applied as a current collector for a lithium secondary battery, and in a peak curve with respect to a (111) plane appearing on an X-ray diffraction analysis graph (a graph in which an X-axis variable is a diffraction angle 2θ and a Y-axis variable is an intensity of a diffracted X-ray) in a state where the electric copper foil is not thermally treated, the electric copper foil has a full width at half maximum (FWHM) of 0.08 or above and 0.15 or below.
A copper foil for a current collector of a lithium secondary battery has a crystalline structure, in which a ratio of the sum of texture coefficients of a (111) surface and a (200) surface to the total sum of texture coefficients of the (111), (200) and (220) surfaces is 60 to 85%, a ratio of the texture coefficient of the (111) surface to the total sum of texture coefficients of the (111), (200) and (220) is 18 to 38%, a ratio of the texture coefficient of the (200) surface thereto is 28 to 62%, and a ratio of the texture coefficient of the (220) surface thereto is 15 to 40%. The copper foil has surface roughness (Rz-JIS) of 2 mum or less, weight deviation of 3% or less, tensile strength of 30 to 40 kgf/mm2, elongation of 3 to 20%, and thickness of 1 to 35 mum.
Disclosed is an apparatus for manufacturing an electrolytic metal foil, which includes an electrolytic cell containing electrolyte; an upper drum installed in an upper portion of the electrolytic cell to be rotatable and to which a negative potential is applied; a lower drum soaked in the electrolyte of the electrolytic cell and installed to be rotatable together with the upper drum; a cathode belt mounted around outer circumferences of the upper and lower drums to move along an endless track and electrically connected to the upper drum so that the negative potential is applied thereto; and an anode unit installed to form a space from a metal electroplating surface of the cathode belt soaked in the electrolytic cell so that a positive potential is applied thereto, the anode unit having a slit for supplying the electrolytic to the space. This apparatus may increase a production rate of electrolytic metal foils.
patents
