Electrolyte for lithium secondary battery comprising...

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method

Reexamination Certificate

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C429S326000, C429S200000, C429S344000, C252S062200

Reexamination Certificate

active

07745056

ABSTRACT:
Disclosed herein is an electrolyte for lithium secondary batteries comprising: a chelating agent, which forms complexes with transition metal ions in the battery, and at the same time does not react and coordinate with lithium ions; a non-aqueous solvent; and an electrolyte salt, as well as a lithium secondary battery comprising the electrolyte. The chelating agent, which is contained in the electrolyte for lithium secondary batteries, can suppress a side reaction in which transition metal ions are reduced and deposited as transition metals on the anode. Also, the chelating agent can suppress internal short-circuits in the battery and the resulting voltage drop of the battery and a reduction in the safety and performance of the battery, which can occur when transition metals are deposited on the anode.

REFERENCES:
patent: 4670363 (1987-06-01), Whitney et al.
patent: 6485868 (2002-11-01), Tsujioka et al.
patent: 6576373 (2003-06-01), Iwamoto et al.
patent: 2006/0194118 (2006-08-01), Yew et al.
patent: 2004063123 (2004-02-01), None
patent: 2005-259635 (2005-09-01), None
Written Opinion for PCT/KR2006/005152 dated Feb. 27, 2007.
International Search Report for PCT/KR2006/005152 dated Feb. 27, 2007.
Korean Office Action dated Jul. 7, 2008 corresponding to Korean Patent Application No. 10-2005-0116827.
Candian Office Action dated Dec. 11, 2009.

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