Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Patent
1994-01-26
1995-09-26
Niebling, John
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
429188, 429223, 429229, H01M 1034
Patent
active
054533368
ABSTRACT:
An improved rechargeable zinc cell is described comprising a zinc electrode and another electrode such as, for example, a nickel-containing electrode, and having an electrolyte containing one or more hydroxides having the formula M(OH), one or more fluorides having the formula MF, and one or more carbonates having the formula M.sub.2 CO.sub.3, where M is a metal selected from the group consisting of alkali metals. The electrolyte inhibits shape change in the zinc electrode, i.e., the zinc electrode exhibits low shape change, resulting in an improved capacity retention of the cell over an number of charge-discharge cycles, while still maintaining high discharge rate characteristics.
REFERENCES:
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patent: 4247610 (1981-01-01), Thorton
patent: 5215836 (1993-06-01), Eisenberg
patent: 5302475 (1994-04-01), Adler et al.
Adler, T. C., et al., "Low-Zinc-Solubility Electrolytes for Use in Zinc/Nickel Oxide Cells", J. Electrochem. Soc., vol. 140, No. 2, Feb. 1993, pp. 289-294.
McLarnon, Frank R., et al., "The Secondary Alkaline Zinc Electrode", J. Electrochem. Soc., vol. 138, No. 2, Feb. 1991, pp. 645-664.
Nichols, James T., et al., "Zinc Electrode Cycle-Life Performance in Alkaline Electrolytes Having Reduced Zinc Species Solubility", Chem. Eng. Commun., vol. 37, 1985, pp. 355-379. No month available.
Adler Thomas C.
Cairns Elton J.
McLarnon Frank R.
Bell Bruce F.
Martin Paul R.
Niebling John
Regents of the University of California
Taylor John P.
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