According to the present invention, a doped electrode is manufactured by doping an active material included in an electrode with an alkali metal in a dope solution containing a first aprotic solvent and an alkali metal salt. The doped electrode is washed using a cleaning solution that contains a second aprotic solvent having a lower boiling point than the first aprotic solvent. The cleaning solution is controlled so that the content ratio of the first aprotic solvent is 8 vol% or less of the cleaning solution.
H01G 11/06 - Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
H01G 11/86 - Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
H01G 13/00 - Apparatus specially adapted for manufacturing capacitorsProcesses specially adapted for manufacturing capacitors not provided for in groups
A method for producing an electrode, wherein an electrode (1) is produced by doping an active material in an electrode precursor, which has a layer containing the active material, with an alkali metal. The electrode precursor and a counter electrode unit (137, 139, 141, 143) are brought into contact with a solution containing alkali metal ions within a dope tank (17, 19, 21). The counter electrode unit is provided with a conductive base material (153), an alkali metal-containing plate (155), and a member (154) having an opening. The member having an opening is positioned between the conductive base material and the alkali metal-containing plate. The member having an opening is, for example, a resin film having an opening.
A doped electrode is manufactured using a method for manufacturing an electrode. The doped electrode includes an active material doped with an alkali metal. In the method for manufacturing an electrode, a doping solution is brought into contact with an electrode. The electrode comprises a current collector and an active material layer. The active material layer is formed on the surface of the current collector and includes the active material. The doping solution includes alkali metal ions and is flowing. In the method for manufacturing an electrode, for example, the alkali metal is electrically doped in the active material using a counter electrode unit provided facing the electrode.
A power storage device according to the present invention comprises: an electrode unit comprising a positive electrode, a separator, and a negative electrode; and an electrolyte. The negative electrode comprises a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer has: an excess region A not positioned opposite a positive electrode active material layer; an end region B positioned opposite a region that extends from an end of the positive electrode active material layer toward the center of the positive electrode active material layer at a length equivalent to 5% of the length from the center to the end of the positive electrode active material layer; and a central region C other than the excess region A and the end region B. The negative electrode electrical potential VA of the excess region A and the negative electrode electrical potential VC of the central region C after a short has occurred between the positive electrode and the negative electrode satisfy expressions (1) through (3) below. Expression (1): VA ≤ 2.0V; expression (2): VC ≤ 1.0V; expression (3): VA/VC ≥ 0.7.
An electrode production method according to the present invention produces an electrode that contains an active material doped with an alkali metal. According to the present invention, an electrode precursor which is provided with a collector and an active material layer that is formed on the surface of the collector and contains an active material is immersed into a pretreatment solution which contains alkali metal ions, a solvent, and an additive that is capable of suppressing reductive decomposition of the solvent. After immersion of the electrode precursor in the pretreatment solution, the active material is doped with an alkali metal using a dope solution that contains alkali metal ions.
This electrode manufacturing system comprises a doping unit, a cleaning unit, and a conveyance unit. The doping unit performs a process to dope an active material of a band-shaped electrode with an alkali metal, said electrode having an active material layer formation section where an active material layer that includes the active material is formed, and an active material layer non-formation section where the active material layer is not formed. The cleaning unit cleans the active material layer non-formation section neighboring the active material layer formation section where the aforementioned process was performed. The conveyance unit conveys the electrode from the doping unit to the cleaning unit.
H01G 11/06 - Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
H01G 11/50 - Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
H01G 11/86 - Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
H01G 13/00 - Apparatus specially adapted for manufacturing capacitorsProcesses specially adapted for manufacturing capacitors not provided for in groups
Provided is a doping system which dopes alkali metal to an active material in a belt-shaped electrode having an active material-containing layer. The doping system comprises a dope tank, a transfer unit, a counter electrode unit, a connection unit, and a collection unit. The dope tank accommodates a solution that contains alkali metal ions. The transfer unit transfers an electrode along a path passing through the dope tank. The counter electrode unit is accommodated in the dope tank. The connection unit electrically connects the counter electrode unit and transfer rollers included in the transfer unit. The collection unit collects, in the dope tank, the solution adhering to the electrode which has passed the dope tank.
H01G 11/50 - Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
H01G 13/00 - Apparatus specially adapted for manufacturing capacitorsProcesses specially adapted for manufacturing capacitors not provided for in groups
8.
ELECTRODE PRODUCTION SYSTEM AND ELECTRODE PRODUCTION METHOD
This electrode production system is equipped with a cutting device. The cutting device cuts a member for electrodes along one direction of the member for electrodes, to produce electrodes. The electrode member is equipped with a plurality of first sites and a second site. The first site contains an active material doped with an alkali metal, and extends in the first direction. The second site is present between two adjoining first sites. There is no active material doped with an alkali metal present at the second site. The cutting device cuts the second site.
H01G 11/86 - Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
H01G 13/00 - Apparatus specially adapted for manufacturing capacitorsProcesses specially adapted for manufacturing capacitors not provided for in groups
9.
ELECTRODE PRODUCTION METHOD, METHOD FOR PRODUCING ELECTRICITY STORAGE DEVICE, AND ELECTRODE PRODUCTION APPARATUS
This electrode production method produces an electrode which is provided with an active material layer containing an active material that is doped with an alkali metal. In an atmosphere having an oxygen concentration of from 1% by volume to 18% by volume (inclusive), the active material is doped with an alkali metal with use of a dope solution that contains ions of the alkali metal. In a method for producing an electricity storage device according to the present invention, a negative electrode active material contained in a negative electrode active material layer of a negative electrode is doped with an alkali metal with use of a dope solution that contains ions of the alkali metal in an atmosphere having an oxygen concentration of from 1% by volume to 18% by volume (inclusive). After the doping of the alkali metal, the electrode cell is formed by sequentially stacking the negative electrode, a separator, and an electrode that is different from the negative electrode.
This electrode manufacturing device manufactures a strip-shaped doped electrode by doping, with alkali metal, an active material in a strip-shaped electrode precursor having a layer that contains the active material. The electrode manufacturing device is provided with: a sensor for detecting a mark that the electrode precursor has; at least one doping tank housing a solution that contains alkali metal ions; a conveyance unit configured so as to convey the electrode precursor along a route passing through the inside of the doping tank; a counter electrode unit housed in the doping tank; a connection unit for electrically connecting the electrode precursor and the counter electrode unit; a power source configured so as to pass a current to the counter electrode unit via the connection unit; and a power source control unit configured so as to control the power source on the basis of a detection result of the sensor.
B05C 3/132 - Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length supported on conveying means
B05C 11/00 - Component parts, details or accessories not specifically provided for in groups
B05C 11/10 - Storage, supply or control of liquid or other fluent materialRecovery of excess liquid or other fluent material
B05C 13/02 - Means for manipulating or holding work, e.g. for separate articles for particular articles
H01G 11/06 - Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
H01G 11/86 - Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
H01G 13/00 - Apparatus specially adapted for manufacturing capacitorsProcesses specially adapted for manufacturing capacitors not provided for in groups
This power storage device comprises an electrode body which is obtained by winding a laminate body that includes a positive sheet and a negative sheet. The positive sheet comprises a positive current collector, and a positive-electrode active material layer formed on the positive current collector. The negative sheet comprises a negative current collector, and a negative-electrode active material layer formed on the negative current collector. In at least one part of the negative current collector, through holes with an aperture width of 350 µm or more are formed and the aperture ratio is 31-59%.
H01G 11/70 - Current collectors characterised by their structure
H01G 11/06 - Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
H01G 11/50 - Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
H01M 4/70 - Carriers or collectors characterised by shape or form
H01M 10/04 - Construction or manufacture in general
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
12.
POWER STORAGE DEVICE AND METHOD FOR MANUFACTURING SAME
Provided are a power storage device and a method for manufacturing the same, wherein an electrical connection between a current collector and a lead is reliably achieved with small welding energy, a separator is not melted when the current collector and the lead are electrically connected, and thus a positive electrode and a negative electrode can be prevented from being short-circuited. This power storage device is provided with an electrode body, in which positive electrodes and negative electrodes, in each of which an active material layer is formed on a current collector, are laminated with separators therebetween. The current collector on at least one side of the positive and negative electrodes has an uncoated part on which an active material layer is not formed, and a joint part in which the uncoated part and the lead are joined is formed in the current collector. The lead connected to at least one among the positive electrode and the negative electrode has a recess part at a position where the joint part is formed. In a plan view viewed in the thickness direction of the lead, a rectangle having a first width (w1) in one direction and a second width (w2) in the other direction circumscribes the peripheral edge of an opening of the recess part, a rectangle having a fifth width (w5) in one direction and a sixth width (w6) in the other direction circumscribes the peripheral edge of the joint part, and the relationship of w5≤w1 is satisfied.
The purpose of the present invention is to provide: a positive electrode for lithium ion capacitors which is capable of inhibiting the resistance from increasing at low temperatures, of improving the low-temperature initial discharge capacity and energy density, and of lessening a decrease in the ratio of -30°C charge/discharge capacity to ordinary-temperature charge/discharge capacity; and a lithium ion capacitor including the positive electrode. This positive electrode includes a positive electrode layer (A) which, after the following pretreatment for measurement, has a volume of pores having a diameter of 1.0 nm or larger but smaller than 1.4 nm of 0.11 cc/g or greater, the volume being calculated by the HK method, and has a total pore volume, calculated by the BET method, of 1.1 cc/g or less. Pretreatment for measurement: The positive electrode that was taken out of the cell in the state of having a cell voltage of 3 V and that was cut out is immersed with stirring at 25°C for 10 minutes in 10 cc of dehydrated acetonitrile per cm3 of the positive electrode. This immersion is repeated three times, and the positive electrode is then predried at 60°C for 1 hour. The positive electrode layer (A) is scraped off from the obtained predried positive electrode and dried for 2 hours under the conditions of 200°C and a pressure reduced to 5.5 Pa.
Provided is an electricity storage device, whereby a gas generated in an outer container is safely discharged, expansion generated when used for a long period of time can be suppressed, and a high capacity maintenance rate can be obtained. This electricity storage device has: an outer container; an electrode unit, which is disposed in the outer container, and which has a positive electrode and a negative electrode; a metallic sealing plate, which seals the outer container, and which has a hole formed in a part thereof; and a plate-like member that is provided in the hole of the sealing plate. The electricity storage device is characterized in having the plate-like member that has a CO and CO2 gas permeability equal to or higher than 0.0005 cc/(hr∙atm), and a water permeability equal to or lower than 0.001 mg/hr, said gas permeability and said water permeability being in the thickness direction.
Provided is a power storage device having high energy density, low resistance, and high durability. A power storage device provided with: an electrode unit in which a positive electrode on which a positive-electrode active-substance layer is formed and a negative electrode on which a negative-electrode active-substance layer is formed are layered in alternating fashion interposed by a separator, and an electrolyte made from an aprotic organic solvent electrolyte solution of a lithium salt. The expressions 0.35 ≤ a/b ≤ 0.95, 0.55 ≤ b/c ≤ 1.00, and 0.35 ≤ a/c ≤ 0.55 hold, where a is the cell capacity (mAh) when the power storage device is discharged from a fully charged state to a voltage that is half the fully charged voltage in 0.75 to 1.25 hours, b is the full negative-electrode capacity (mAh) when the negative electrode in the fully charged state is discharged to the point at which the negative electrode potential reaches 1.5 V (Li/Li+), and c is the total negative-electrode charge capacity (mAh) when the negative electrode at 0V is subjected to constant current, constant voltage (CCCV) charging over 12 hours. The electrode density of the positive-electrode active-substance layer is 0.54-0.7 g/cm3, and the electrode weight of the positive-electrode active-substance layer is 70-110 g/m2.
H01M 10/0585 - Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
17.
ELECTRODE ACTIVE MATERIAL, ELECTRODE, AND ELECTRICITY-STORAGE DEVICE
The present invention pertains to an electrode active material, an electrode, and an electricity-storage device. Said electrode active material contains a carbonaceous material and has at least 0.020 millimoles of basic functional groups per gram.
This method for manufacturing an electricity-storage device (100) includes a step in which a rolled body (20) that has a straight section (22) and curved sections (24) is formed by rolling a positive electrode (40), a negative electrode (50), and a lithium-ion supply source (30) that has a plurality of sections (32, 34) with gaps (36) therebetween in the rolling direction. In said step, the rolled body (20) is formed such that the gaps (36) are located in the curved sections (24).
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
19.
ELECTRICITY STORAGE DEVICE AND ELECTRICITY STORAGE MODULE
An electricity storage device (100) according to the present invention comprises: an exterior body (10) having an opening (12); an electrode body (20) housed in the exterior body (10); a terminal plate (40) electrically connected to the electrode body (20); and a holder section (50) provided in the periphery of the terminal plate (40). A step or slope is provided at the portion where the terminal plate (40) comes in contact with the holder section (50).
The electricity storage module (100) related to the present invention is created by laminating multiple storage cells (10) having electrode terminals (16) together. The electricity storage module (100) comprises a bus bar (40) for electrically connecting the multiple electrode terminals (16), conductive members (50) that are fixed to the bus bar (40), a detection unit for detecting the voltages of the multiple storage cells (10), wiring sections that are electrically connected to the detection unit, and circuit boards (60) on which pad sections connected to the wiring sections are formed. The conductive members (50) are brought into contact with the pad sections.
H01G 9/28 - Structural combinations of electrolytic capacitors, rectifiers, detectors, switching devices with other electric components not covered by this subclass
H01M 2/10 - Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
H01M 2/20 - Current-conducting connections for cells
The purpose of the present invention is to provide a high energy density and high output power storage device. This power storage device (D) has a positive electrode formed by a positive electrode layer (A), a negative electrode formed by a negative electrode layer (B), and an electrolyte (C). Letting WA be the weight of the positive electrode layer (A), WB be the weight of the negative electrode layer (B), and TA be the thickness of the positive electrode formed by the positive electrode layer (A), the power storage device is characterized by having 1.02 ≤ WA/WB ≤ 2.08 and satisfying 390 µm ≤ TA ≤ 750 µm.
Provided is a lithium-ion capacitor with low internal resistance, high energy density, and a high capacity retaining-rate, equipped with: a positive electrode obtained by forming a positive electrode active layer on a positive electrode current collector that has been subjected to a surface-roughening treatment; a negative electrode obtained by forming a negative electrode active layer, having graphite particles, formed on a negative electrode current collector; and an electrolyte solution of a lithium salt in a nonprotonic organic solvent. The present invention is characterized in that the total thickness of the positive electrode active layer is 50-140 μm, and the mass ratio of the positive electrode active layer to the sum of the mass of the positive electrode active layer and the negative electrode active layer is 0.4-0.5
Provided is a lithium ion capacitor with which a high capacitance retention rate can be obtained and increases in internal resistance are suppressed even when high load charging/discharging is repeated many times, and with which short-circuiting due to deposition of lithium on a negative pole cannot occur, therefore making it possible to obtain a long life. The lithium ion capacitor has a positive pole, a negative pole, and an electrolyte, and the negative pole has electrode layers including a negative pole active substance on each of the front face and rear face of a current collector, the lithium ion capacitor being characterized in that each of the electrode layers in the negative pole have a thickness deviation ratio of -10 to 10% with respect to the average value of the thickness of the electrode layers formed on the front face of the current collector and the thickness of the electrode layers formed on the rear face of the current collector.
H01G 11/06 - Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
H01G 11/28 - Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collectorLayers or phases between electrodes and current collectors, e.g. adhesives
H01G 11/38 - Carbon pastes or blendsBinders or additives therein
The objective of the present invention is to provide a lithium ion capacitor having high safety, high capacitance, and high output characteristics, the ability of the capacitor to achieve a high surface temperature being inhibited even during internal short-circuiting. This lithium ion capacitor comprises a lithium ion capacitor element formed by superimposing a positive electrode sheet and a negative electrode sheet via an interposed separator, and an electrolytic solution, the element and the solution being accommodated in an external container, wherein a porous layer is formed on the outside surface of the lithium ion capacitor element, and relational expressions (1) and (2) below are satisfied. In the expressions, C (kF) is the electrostatic capacitance of the lithium ion capacitor, is R(mΩ) is the DC resistance of the lithium ion capacitor, and T (μm) is the thickness of the porous layer. Relational expression (1): 35 ≦ T × R/C Relational expression (2): 0.01 ≦ R/C ≦ 5
The purpose of the present invention is to provide an electricity storage device that, when an electrical connection is made using plate-shaped contact members, can reduce contact resistance with a plate-shaped contact member at an electrode terminal, and to provide an electricity storage device apparatus where contact resistance between constituent members can be easily reduced. The cylindrical electricity storage device of the present invention is accommodated inside an outer container in which an electrode unit and electrolytes are sealed by a lid; a positive electrode terminal and a negative electrode terminal are provided in a mutually insulated state on the lid; the positive electrode terminal and the negative electrode terminal have, respectively, a positive electrode plate section and a negative electrode plate section that are plate-shaped and have an edge section extending along the outer peripheral edge of the lid, and this positive electrode plate section and negative electrode plate section are disposed on the lid. An electricity storage device apparatus is characterised by having a configuration wherein a plurality of such cylindrical electricity storage devices are electrically connected via a plurality of plate-shaped contact members.
Disclosed is a laminated-exterior electricity-storage device in which, if a gas is produced inside an exterior package, said gas can be reliably discharged from a specific area regardless of the usage environment. Also disclosed is a method that can easily manufacture such a laminated-exterior electricity-storage device. The disclosed laminated-exterior electricity-storage device is provided with: an exterior package in which layered exterior films are joined together, in an airtight manner, at join sections formed on the outer edges of said exterior films; electricity-storage device elements and an electrolyte solution contained in a containing section formed inside the exterior package; and a clamping mechanism provided with clamping members that extend along the aforementioned outer edges so as to clamp the aforementioned join sections together. Unclamped-section-forming parts are formed on at least part of the aforementioned clamping members.
H01G 11/82 - Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
H01G 11/84 - Processes for the manufacture of hybrid or EDL capacitors, or components thereof
H01G 9/12 - Vents or other means allowing expansion
Disclosed is a storage battery device in which there is no increase in electrical resistance between electrode terminals and in addition short-circuiting of a positive-pole electrode terminal sheet and a negative-pole electrode terminal sheet does not occur, even during prolonged use. The storage battery device comprises: an outer container which is constituted by mutually overlaid outer films that are joined in a mutually airtight manner by means of joining sections formed along the outer peripheral sections of each of the outer films; an electrode unit which is accommodated in the outer container and is constituted by arranging a positive-pole electrode sheet and negative-pole electrode sheet, which are constituted by electrode layers respectively formed on current collectors, so that the positive-pole electrode sheet and the negative-pole electrode sheet are overlaid with a separator therebetween; a positive-pole electrode terminal and a negative-pole electrode terminal which are provided so as to project from the inside of the outer container to the outside by way of the joining sections; and an electrolytic solution which is filled inside the outer container. The positive-pole electrode terminal has: a terminal base which is made of aluminium; and a nickel-plating coating which is formed on the surface of the outer end portion of the terminal base, with the outer end portion being positioned outside of the outer container. The inner edge of the nickel-plating coating is positioned inside the joining sections.
Provided is a laminate outer packaging storage device capable of, even when a gas is produced inside the outer package body, reliably discharging the gas from a specific region without causing liquid leakage. The laminate outer packaging storage device has an outer package body formed such that mutually overlapped outer package films are hermetically joined with each other at a joining portion formed at the peripheral edge portions of the respective outer package films. In the laminate outer packaging storage device, a storage device element and an electrolyte are housed in a housing portion formed inside the outer package body. A non-joining region surrounded by the joining portion and communicatively connected to the housing portion is formed at the peripheral edge portions of the respective mutually overlapped outer package films constituting the outer package body. An opening portion and a sealing portion are formed in the region where the non-joining region is formed, the opening portion passing through at least one of the outer package films, the sealing portion being formed so as to surround the opening portion and being formed by joining parts of the outer package films to each other. The opening portion is formed at a position other than the central position of the region where the non-joining region is formed.
Disclosed is a method for producing an electric storage device 100 including an adhering step whereby laminate body 80, having lithium foil 82 and metal foil 84, are adhered with adhesive 90 to at least one of either a first separator 50a or a second separator 55a, and a winding step whereby the following are wound: the first separator 50a, the second separator 55a, the laminate body 80, and positive electrode 60 and negative electrode 70, which are disposed on either first separator 50a or second separator 55a.
H01G 11/06 - Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
H01G 11/82 - Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
H01G 11/84 - Processes for the manufacture of hybrid or EDL capacitors, or components thereof
H01G 9/00 - Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devicesProcesses of their manufacture
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 4/134 - Electrodes based on metals, Si or alloys
Disclosed is an electrical storage device having low internal resistance and high productivity that is provided with a pair of electrode terminals on one end and has a wound electrode unit disposed within an external casing. The electrical storage device is provided with an external metal casing in which an end wall and another end wall have been integrally formed on both ends of the peripheral wall; a wound electrode unit that comprises an electrode sheet and another electrode sheet having an electrode layer formed on a current collector that are stacked and wound with a separator therebetween, and that is disposed within the external casing along the axial direction thereof; an electrode terminal that is insulated from the one end wall; and another electrode terminal that is disposed on the one end wall in a manner electrically connected to the one end wall. The one electrode terminal is electrically connected to a side edge on the current collector in the one electrode sheet positioned adjoining the one end wall, and the other electrode terminal is electrically connected via the external casing by the electrical connection of the other end wall to another side edge on the current collector in the other electrode sheet positioned adjoining the other end wall.
H01G 11/74 - Terminals, e.g. extensions of current collectors
H01M 10/04 - Construction or manufacture in general
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
Provided is an electricity-storage device whereby, even if a fine lithium metal powder from a lithium ion supply source breaks free and adheres to an outer case, aluminum that forms the outer case is prevented from alloying with the lithium. The provided electricity-storage device comprises: an outer case, at least part of which comprises aluminum or an aluminum alloy; a negative electrode and positive electrode inside the outer case; and a lithium-salt-containing electrolyte solution inside the outer case. Due to electrochemical contact between the lithium ion supply source disposed inside the outer case and the negative electrode and/or positive electrode, said negative electrode and/or positive electrode becomes doped with lithium ions. The provided electricity-storage device is characterized in that the part of the outer case that comprises aluminum or an aluminum alloy is at the potential of the positive electrode.
A wound-type accumulator which is simplified in the layout of lithium ion sources and shortened in time spent on injecting a nonprotonic organic solvent electrolytic solution and on predoping, so as to allow quick completion of assembly and obtain high productivity. The wound-type accumulator is provided with: a cylindrical wound electrode unit which has cathode and anode strips and is configured by winding from one end an electrode stack comprised of a stack of the cathode and anode with a separator disposed therebetween; and an electrolytic solution. In this wound-type accumulator, the cathode and/or anode is doped with lithium ions and/or anions by means of electrochemical contact of the cathode and/or anode with a lithium ion source. At the cathode, a cathode gap section is formed, and at least one lithium ion source is arranged at the cathode gap section or at a position opposing the cathode gap section at the anode, in a state not contacting the cathode.
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
H01M 10/0569 - Liquid materials characterised by the solvents
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
33.
OVER DISCHARGE PREVENTING DEVICE AND ELECTRIC STORAGE DEVICE
Provided is an over discharge preventing device wherein a switch is opened and a current flowing to a load connected to the electric storage device is interrupted when a voltage of an electric storage device is at a prescribed voltage or lower, and an input current flowing to the over discharge preventing device itself is interrupted when the voltage of the electric storage device is further reduced.
A capacitor electrode which can be industrially manufactured and has a high conductivity, high strength and excellent uniformity is provided. A capacitor using such capacitor electrode is also provided. A coated electrode is provided with a collector composed of an aluminum etching foil, which has a thickness of 20-45μm, an apparent density of 2.00-2.54g/cm3 and many through holes that penetrate the front and rear surfaces having an air permeability of 20-120s; and an electrode layer, which is formed by coating the collector with a coating material containing a substance that can reversibly support lithium ions and anions as an active material.
