Electrochemical cell

Details Electrochemical cell Electrochemical cell

1978-10-02

1980-05-20

LeFevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Elastic, resilient or spring biasing valve means

429 99, 429200, 429203, 429220, 429228, H01M 212

Patent

active

042040345

ABSTRACT:
A rechargeable electrochemical cell (10 in FIG. 1) has a negative electrode (11) with an active surface (11') of copper; a positive electrode (12) with an active surface (12') of lead dioxide, spaced therefrom; in an aqueous acid electrolyte (13) of fluoboric, fluosilicic, sulfamic, or perchloric acid, in which both divalent copper and divalent lead ions are soluble during discharging, and from which smooth and adherent deposits may be obtained during charging; and a container (14) with an electrically nonconductive inner surface (14') that is chemically resistant to the electrolyte (13).
A similar cell (30 in FIG. 5) comprises also bipolar electrodes (32,31) similar in shape to the negative electrode (31) and the positive electrode (32), positioned between them and substantially parallel to them. As in FIG. 2, the container may comprise a fluid-tight enclosure (24,25) with an optional pressure relief valve (28).

REFERENCES:
patent: 2269040 (1942-01-01), Rublee
patent: 3440100 (1969-04-01), Gumucio et al.
patent: 3770507 (1973-11-01), Weissman
patent: 4001037 (1977-01-01), Beck
patent: 4074027 (1978-02-01), Akers et al.
patent: 4074029 (1978-02-01), Ruben

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