Additive for electrochemical cell stability

Details Additive for electrochemical cell stability Additive for electrochemical cell stability

1979-10-01

1981-04-28

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429224, 296231, H01M 450

Patent

active

042646898

ABSTRACT:
A nonaqueous electrochemical cell and a method for the construction thereof wherein the cell contains a metal salt additive such as lithium nitrate (LiNO.sub.3) or calcium nitrate Ca(NO.sub.3).sub.2 which reduces the reactivity of substantially the entire active cathode surface. Electrolyte solvents such as propylene carbonate are thereby substantially prevented from reacting, on the surface of the cathode, with oxidizing agents within the cell. Decomposition of the electrolyte solvent with gaseous evolution is substantially reduced and cell stability is enhanced. The metal salt additives are particularly useful in nonaqueous cells containing manganese dioxide cathodes.

REFERENCES:
patent: 4133856 (1979-01-01), Ikeda et al.
patent: 4160070 (1979-07-01), Margalit
patent: 4163829 (1979-08-01), Kronenberg
patent: 4184017 (1980-01-01), Kelsey et al.

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