Non-aqueous electrolyte secondary battery

Details Non-aqueous electrolyte secondary battery Non-aqueous electrolyte secondary battery

2007-05-18

2011-11-29

Michener, Jennifer K. (Department: 1728)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S188000

Reexamination Certificate

active

08067119

ABSTRACT:
A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including an active material absorbing and desorbing lithium ions, a negative electrode including an active material absorbing and desorbing lithium ions, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The separator includes a material containing a substituent group with electron-withdrawing property. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, and the non-aqueous solvent includes at least one selected from the group consisting of a fluorine-containing aromatic solvent, a fluorine-containing cyclic carbonic acid ester, and a fluorine-containing cyclic carboxylic acid ester.The combination of the foregoing separator and the foregoing non-aqueous electrolyte makes it possible to suppress the deterioration in the rate performance of the battery even when the battery is stored under high voltage and high temperature.

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Korean Office Action issued in Korean Patent Application No. 10-2008-7016225, mailed on Jun. 25, 2010.
Translation of Chinese Office Action issued in Chinese Patent Application No. CN 2007800023514 dated Oct. 9, 2009.

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