Hydrogen fluoride additive for nonaqueous electrolyte in alkali

Details Hydrogen fluoride additive for nonaqueous electrolyte in alkali Hydrogen fluoride additive for nonaqueous electrolyte in alkali

1998-05-27

2000-09-12

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

4292312, 429325, 429326, 429328, 429329, 429330, 429332, 429333, 429334, 429335, H01M 458

Patent

active

061175919

ABSTRACT:
An alkali metal, solid cathode, nonaqueous electrochemical cell capable of delivering high current pulses, rapidly recovering its open circuit voltage and having high current capacity, is described. The stated benefits are realized by the addition of hydrogen fluoride to the nonaqueous electrolyte comprising an alkali metal salt dissolved in a mixture of a low viscosity solvent and a high permittivity solvent. A preferred solvent mixture includes propylene carbonate, dimethoxyethane and hydrogen fluoride having LiAsF.sub.6 or LiPF.sub.6 dissolved therein.

REFERENCES:
patent: 3825445 (1974-07-01), MacCarthy
patent: 4273839 (1981-06-01), Carr et al.
patent: 4663249 (1987-05-01), Gordon
patent: 4670358 (1987-06-01), Gordon et al.
patent: 4814241 (1989-03-01), Nagashima et al.
patent: 5472810 (1995-12-01), Takeuchi et al.

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