Secondary lithium battery

H - Electricity – 01 – M

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H01M 10/40 (2006.01) H01M 4/36 (2006.01) H01M 4/48 (2006.01) H01M 4/58 (2006.01) H01M 4/60 (2006.01) H01M 6/16 (2006.01)

Patent

CA 1290010

ABSTRACT The present invention provides an electrolyte for use on a secondary lithium battery comprising amorphous V2O5 base cathode active material, a metallic lithium base active material, and an electrolytic solution lithium salt dissolved in a mixed organic solvent. The organic solvent is ethylene carbonate mixed with one organic solvent of 2-methyltetrahydrofuran, 2,5-dimethyltetrahydrofuran, 1,3-dioxalan, 4-methyl-1,3-dioxalan, 1,2-dimethoxyethane, etc. The mixed ratio of ethylene carbonate ranges within 10 to 50%, and water content of the electrolytic solution ranges within 400 to 5 ppm, and the content of impurities other than water ranges within 1000 to 10 ppm. The resultant secondary lithium battery is excellent in charge-discharge cycle life.

522087

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