Rechargeable lithium electrochemical cell

Details Rechargeable lithium electrochemical cell Rechargeable lithium electrochemical cell

1995-04-21

1997-05-06

Valentine, Donald R.

Chemistry: electrical current producing apparatus, product, and

Fluid active material or two-fluid electrolyte combination...

Active material in solution

429137, 429197, 429198, H01M 438, H01M 448, H01M 616

Patent

active

056269811

ABSTRACT:
The present invention concerns a rechargeable lithium electrochemical cell comprising an anode containing a carbon-containing material with a degree of crystallinity which is greater than 0.8 and an electrolyte comprising a lithium salt and a mixture of at least two aprotic organic solvents, of which the first solvent has a high dielectric constant and the second solvent has low viscosity. The electrolyte further contains a soluble compound of the same type as at least one of said solvents and contains at least one unsaturated bond, and which can be reduced at the anode at a potential of more than 1 volt with respect to lithium to form a passivation layer.

REFERENCES:
patent: 5292601 (1994-03-01), Sugeno et al.
patent: 5352548 (1994-10-01), Fujimoto et al.
patent: 5389467 (1995-02-01), Herr et al.
patent: 5472809 (1995-12-01), Perton et al.
patent: 5484669 (1996-01-01), Okuno et al.
Patent Abstracts of Japan, vol. 11, No. 309 (E-547) 8 Oct. 1987 & JP-A-62 100 950 (Showa Denko).
Patent Abstracts of Japan, vol. 11, No. 309 (E-547) 8 Oct. 1987 & JP-A-62 100 4948 (Showa Denko).

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