Phosphonate additives for nonaqueous electrolyte in alkali metal

Details Phosphonate additives for nonaqueous electrolyte in alkali metal Phosphonate additives for nonaqueous electrolyte in alkali metal

1997-11-05

2000-08-01

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Having pulse feature

429 50, 429328, 429332, 429333, 607116, H01M 616, H01M 1040

Patent

active

060964472

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 at least one phosphonate additive to an 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 an alkyl phosphonate additive.

REFERENCES:
patent: 4536456 (1985-08-01), Evans
patent: 4604330 (1986-08-01), Walsh
patent: 4622276 (1986-11-01), Walsh
patent: 5393621 (1995-02-01), Chaloner-Gill
patent: 5453337 (1995-09-01), Willmann et al.
patent: 5470674 (1995-11-01), Doddapaneni et al.
patent: 5580684 (1996-12-01), Yokoyama et al.

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