Potassium ion additives for voltage control and performance impr

Details Potassium ion additives for voltage control and performance impr Potassium ion additives for voltage control and performance impr

1995-06-07

1997-11-25

Valentine, Donald R.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

H01M 614

Patent

active

056910835

ABSTRACT:
An electrochemical cell having a lithium or lithium alloy anode, a solid cathode, and a nonaqueous, liquid electrolyte, includes an amount of a potassium salt which is effective to lower the open circuit voltage of the cell without causing any significant detrimental effects such as corrosion of the anode or self discharge of the cell. More specifically, the electrolyte comprises one or more organic solvents, an electrochemically active amount of one or more primary salts, and more than about 0.001 mol/l of one or more potassium salt additives which achieve the desired open circuit voltage without any harmful effects on the cell. The potassium salt additives have also been found to enhance load voltage on the first 50% depth of discharge, indicating improved rate performance.

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