Chargeable lithium electrochemical cell and method of manufactin

Details Chargeable lithium electrochemical cell and method of manufactin Chargeable lithium electrochemical cell and method of manufactin

1994-07-08

1996-10-01

Bell, Bruce F.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429194, 429206, 429207, 429224, 429233, 429 60, 429122, 429128, 429129, 423599, 423641, 296231, H01M 458

Patent

active

055610064

ABSTRACT:
The present invention consists in a rechargeable cell having an anode made from materials in which lithium can be inserted, a cathode and an electrolyte constituted by a solution of a lithium salt in a non-aqueous solvent. The material of said cathode includes at least one substance which is a yellow-green single-phase oxide of lithium and manganese with an orthorhombic crystal structure with the following lattice parameters: a=0.459.+-.0.004 nm, b=0.577.+-.0.004 nm and c=0.281.+-.0.003 nm and containing lithium ions in a molar ratio Li/Mn such that 0.85.ltoreq.Li/Mn.ltoreq.1.10. After a first charge said substance is discharged in two stages of which the higher is at a mean voltage greater than 3.5 volts relative to the lithium.

REFERENCES:
patent: 5370949 (1994-12-01), Davidson et al.
Tsutomu Ohzuku et al, "LiMnO2 as Cathode for Secondary Lithium Cell", Chemistry Express, vol. 7, No. 3, Mar. 1992, pp. 193-196.
J. B. Goodenough, "Manganese Oxides as Battery Cathodes", Extended Abstracts-Abstract NR 71, vol. 84, No. 2, Oct. 1984, p. 103.
Tsutomu Ohzuku et al, "Synthesis and Characterization of LixMnO2 for Rechargeable Lithium Cell", Extended Abstracts--Abstract NR 47, vol. 90, No. 2, 1990, pp. 74-75. No month available.
M. H. Rossow et al, "Structural Aspects of Lithium-Manganese-Oxide Electrodes for Rechargeable Lithium Batteries", Material Research Bulletin, vol. 25, No. 2, 1990, pp. 173-182. No month available.
Tsutomu Ohzuku et al, "Preliminary Results on Synthesis and Characterization of LixMnO2 for Rechargeable Lithium Cell", Chemistry Express, vol. 4, No. 12, 1989, pp. 777-780. No month available.
JP-A-05 242 889, Sep. 21, 1993, Patent Abstracts Of Japan, vol. 17, No. 698, Dec. 20, 1993.
French Search Report FR 9308484 Apr. 13, 1994.

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