Additives for improving cycle life of non-aqueous rechargeable l

Details Additives for improving cycle life of non-aqueous rechargeable l Additives for improving cycle life of non-aqueous rechargeable l

1997-03-05

1999-04-06

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429194, H01M 616

Patent

active

058915923

ABSTRACT:
The loss in delivered capacity (fade) after cycling non-aqueous rechargeable lithium batteries can be reduced by incorporating a small amount of certain additive compounds in the battery. The additive compound comprises boron, oxygen, and organic end groups that are chemically compatible with the battery components. The structure of the additive compound contains a boroxine (BO).sub.3 ring. The invention is particularly suited to lithium ion batteries. Trimethoxyboroxine and trimethylboroxin are particularly effective additives. Preferably, the additive compound is dissolved in the electrolyte.

REFERENCES:
S.S. Zhang and C.A. Angell, A Novel Electrolyte Solvent for Rechargeable Lithium and Lithium-Ion Batteries, J. Electrochem. Soc., vol. 143, No. 12, Dec. 1996, pp. 4047-4053.
CA: 124:330270 Solid Electroytic capacitors, (1998).

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