Cylindrical sealed nickel@-zinc@ battery
Cylindrical sealed Ni-Zn battery designs, which ensure separation of the catholyte and anolyte while allowing gas diffusion between the opposite polarity electrodes, are new. The batteries may have stacked electrode discs, a wound composite strip of the electrodes or a concentric arrangement of elec...
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| Zusammenfassung: | Cylindrical sealed Ni-Zn battery designs, which ensure separation of the catholyte and anolyte while allowing gas diffusion between the opposite polarity electrodes, are new. The batteries may have stacked electrode discs, a wound composite strip of the electrodes or a concentric arrangement of electrodes and preferably include a gas-permeable insulating hydrophobic material, which consists of a PTFE, polypropylene or polyethylene foam, felt or porous material, and an ion conductive membrane which is either an anionic exchange membrane, which minimises zincate ion passage, or a microporous polymer (preferably SiO2-filled polyethylene) foil with its pores filled with Ni(OH)2.
L'invention concerne des architectures permettant la réalisation d'accumulateurs cylindriques étanches Ni-Zn comportant des moyens de séparation entre anolyte et cathoyte, tout en permettant le passage des gaz entre les électrodes de polarité opposée.Les architectures selon l'invention comportent soit l'empilement d'électrodes en forme de disques, soit le spiralage d'électrodes minces, soit encore deux électrodes concentriques.L'invention repose dans les trois cas sur l'emploi de structures poreuses et hydrophobes permettant le passage des gaz mais empêchant le passage d'électrolyte. |
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