The present disclosure relates to a secondary zinc alkaline battery including surface modified negative electrodes (103) and separators (107). The surface modified negative electrodes (103) and separators (107) may be coated with a dispersion solution or a gel electrolyte for coating. The dispersion solution is prepared by uniformly dispersing calcium zincate powder, calcium hydroxide powder or a mixture thereof in a binder or a thickening agent. The gel electrolyte contains 1 - 10 wt% of at least one gel polymer selected from the group consisting of PEO, PVA and PAAK, and 90-99wt% of 3-12M KOH solution. The secondary zinc alkaline battery relieves deformation of the zinc negative electrode and formation of dentrites caused by dissolution of the zinc negative electrode (303) in an alkaline solution.
H01M 10/0585 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure plats, c.-à-d. des électrodes positives plates, des électrodes négatives plates et des séparateurs plats
H01M 4/28 - Précipitation du matériau actif sur le support
H01M 4/485 - Emploi de substances spécifiées comme matériaux actifs, masses actives, liquides actifs d'oxydes ou d'hydroxydes inorganiques d'oxydes ou d'hydroxydes mixtes pour insérer ou intercaler des métaux légers, p. ex. LiTi2O4 ou LiTi2OxFy
H01M 4/583 - Matériau carboné, p. ex. composés au graphite d'intercalation ou CFx
H01M 4/62 - Emploi de substances spécifiées inactives comme ingrédients pour les masses actives, p. ex. liants, charges
2.
SECONDARY BATTERY CAPABLE OF AUTOMATICALLY SUPPLYING AN ELECTROLYTE REFILL
The present invention to a secondary battery (100) in which an electrolyte refill is supplied automatically, in order to prevent decreases in volume and increases in specific gravity of the electrolyte caused by gases produced during charging. The secondary battery (100) may include: a main cell (120) that includes a positive electrode (122) and a negative electrode (124) and contains an electrolyte (128); an auxiliary cell (140) connected with the main cell (120); a case (110) that houses the main cell (120) and the auxiliary cell (140); a vent (132) that connects the main cell (120) with the atmosphere; a gas passageway (152) configured to equalize pressure levels in the main cell (120) and the auxiliary cell (140); and an electrolyte refill passageway (154) through which an electrolyte refill in the auxiliary cell (140) may pass to the main cell (120) at or above a particular pressure level. When the volume of the electrolyte (128) is decreased and the specific gravity is increased due to the production of gases by the dissociation reactions of the electrolyte (128) during charging, the electrolyte refill may be supplied automatically to replenish the electrolyte (128).
H01M 2/12 - Events ou autres aménagements mécaniques pour faciliter l'échappement des gaz
H01M 2/16 - Séparateurs; Membranes; Diaphragmes; Eléments d'espacement caractérisés par le matériau
H01M 2/36 - Dispositions pour le remplissage, la mise à niveau ou la vidange des récipients en liquide, p.ex. pour le remplissage avec des électrolytes, pour le rinçage
3.
METHOD OF FABRICATING NEGATIVE ELECTRODE FOR NICKEL/ZINC SECONDARY BATTERY
The present disclosure relates to a method of fabricating a negative electrode for nickel/zinc secondary batteries. The method can prevent paste agglomeration during formation of paste containing active materials and prevent deformation of the negative electrode or formation of dendrites caused by dissolution of the negative electrode in an alkaline electrolyte solution, thereby improving life span and charge/discharge efficiency of the batteries.
H01M 10/0585 - Structure ou fabrication d'accumulateurs ayant uniquement des éléments de structure plats, c.-à-d. des électrodes positives plates, des électrodes négatives plates et des séparateurs plats
The present invention relates to a rechargeable cell, more particularly to a rechargeable cell that allows easier heat release and provides increased recharge capacity. The rechargeable cell of the present invention may include: a casing, which is shaped as a hexahedron having two or more flat sides and is formed with its width greater than its thickness, and in which a hollow portion is formed; two or more cell units, which are arranged within the hollow portion of the casing and connected in parallel, and each of which has an anode collector and a cathode collector; and one or more partition that partition the hollow portion of the casing while enabling an electrolyte to pass between the two or more cell units.
Disclosed is a negative plate for nickel/metal hydride secondary batteries, comprising a negative plate frame; a terminal connected to the negative plate frame; and two or more strips inserted into the negative plate frame, wherein the strip is formed by filling the space between two metal plates having a plurality of perforations formed thereon with electrode material. Further, provided is a method for fabricating such negative plate for nickel/metal hydride secondary batteries, comprising: perforating metal plates to have a plurality of perforations; filling the space between the two metal plates with powders of an electrode material; compressing the two metal plates having the electrode material therebetween, so as to form a strip; connecting two or more, as many as being required for a predetermined capacity, strips formed as above; and inserting connected strips into the negative plate frame so as to connect with an electrode terminal.
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