Rechargeable galvanic cell with zinc electrode and auxiliary str

Details Rechargeable galvanic cell with zinc electrode and auxiliary str Rechargeable galvanic cell with zinc electrode and auxiliary str

1975-05-07

1977-08-02

LeFevour, C. F.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429229, H01M 604

Patent

active

040397297

ABSTRACT:
A rechargeable galvanic cell has a housing containing at least one negative zinc electrode, at least one positive metal oxide or oxygen electrode, an alkaline electrolyte, at least one electrically conductive auxiliary structure exhibiting low hydrogen overvoltage, for cathodic hydrogen evolution which is not conductively connected with the electrodes, and at least one microporous separator for separating said auxiliary structure from at least one of said electrodes. The structure simultaneously acts as an auxiliary electrode to effect afterdischarging of the zinc electrode when connected thereto and as a dendrite barrier to prevent short-circuiting between the negative and positive electrodes during operation of said cell and is arranged between one positive electrode and one negative electrode.

REFERENCES:
patent: 2903497 (1959-09-01), Comanor
patent: 3069486 (1962-12-01), Solomon et al.
patent: 3096215 (1963-07-01), Voss et al.
patent: 3117033 (1964-01-01), Bachmann
patent: 3410726 (1968-11-01), Hainel
patent: 3502504 (1970-03-01), White
patent: 3540935 (1970-11-01), Keating et al.
patent: 3658591 (1972-04-01), Fukuda et al.
patent: 3769088 (1973-10-01), Seiger et al.
patent: 3876470 (1975-04-01), McBreen

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