Nonaqueous electrolyte secondary battery having a...

Details Nonaqueous electrolyte secondary battery having a... Nonaqueous electrolyte secondary battery having a...

2005-02-08

2005-02-08

Yuan, Dah-Wei (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S188000, C429S218100, C429S231400, C429S231900

Reexamination Certificate

active

06852451

ABSTRACT:
Disclosed is a nonaqueous electrolyte secondary battery, comprising a case having a wall thickness not larger than 0.3 mm, a positive electrode provided in the case, a negative electrode provided in the case and the negative electrode containing a carbonaceous material capable of absorbing-desorbing lithium ions, and a nonaqueous electrolyte provided in the case and the nonaqueous electrolyte containing a nonaqueous solvent including γ-butyrolactone and a solute dissolved in the nonaqueous solvent, wherein after being discharged to 3V with a current of 0.2 C at room temperature, the voltage reduction caused by the self-discharge at 60° C. is not larger than 1.5V in 3 weeks.

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