Use of P.sub.2 O.sub.5 in non-aqueous rechargeable lithium batte

Details Use of P.sub.2 O.sub.5 in non-aqueous rechargeable lithium batte Use of P.sub.2 O.sub.5 in non-aqueous rechargeable lithium batte

1996-06-03

1998-08-04

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429197, 429209, H01M 462, H01M 1040

Patent

active

057891052

ABSTRACT:
The loss in delivered capacity as a function of the number of charge/discharge cycles in non-aqueous rechargeable lithium batteries can be reduced by exposing the electrolyte therein to P.sub.2 O.sub.5. The exposure to P.sub.2 O.sub.5 can be accomplished by incorporating P.sub.2 O.sub.5 in either electrode or other locations that contact the electrolyte. Alternately, the electrolyte can be exposed prior to assembling the battery. The invention is particularly suited to certain lithium ion rechargeable battery electrochemistries.

REFERENCES:
patent: 5273848 (1993-12-01), Noguchi et al.
patent: 5474858 (1995-12-01), Merritt
Y. Sakurai, et al., "Correlation Between Microstructure and Electrochemical Behaviour of Amorphous V.sub.2 O.sub.5 -P.sub.2 O.sub.5 in Lithium Cells", J. Electrochem. Soc., vol. 135, No. 4, Apr. 1988, p. 791.
CA and Derwent database information on European patent application No. 571,858 (May 1993).
CA and Derwent database information on Japanese laid open patent application No. 01-067869 (Mar. 1989).
Derwent and CA database information on International patent application (PCT) WO 9216026 (Sep. 1992).
CA database information on Proc. Electrochem. Soc. 91-12 (Proc. Int. Symp. Ionic Mixed Conduct. Ceram.), 145-54 (1991) (oxide sulfide glass ele) (Month unknown).
B.V.R. Chowdari, et al., "Thin Film Studies on Li.sub.2 O-P.sub.2 O.sub.5 -Nb.sub.2 O.sub.5 Based Fast Ion Conducting Glasses", Solid State Ionics, 40-41, pp. 680-683 (1990) (Month Unknown).

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