LITHIUM SECONDARY BATTERY

Title:

LITHIUM SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2013/187180

Kind Code:

A1

Abstract:

Disclosed is a lithium secondary battery which comprises a positive electrode (1), a negative electrode (2) and an electrolyte solution containing a nonaqueous electrolyte solvent, and which is characterized in that the nonaqueous electrolyte solvent contains a fluorine-containing phosphoric acid ester represented by formula (1) and a fluorinated diether compound represented by formula (20). (In formula (1), at least one of R1, R2 and R3 represents a fluorine-containing alkyl group.) R4O-(R5O)n-R6 (20) (In formula (20), at least one of R4, R5 and R6 represents a group that is substituted by a fluorine atom; and n represents an integer of 1-4.) This secondary battery has high energy density and good cycle characteristics.

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Inventors:

KATOU YUUKOU (JP)
NOGUCHI TAKEHIRO (JP)
SASAKI HIDEAKI (JP)
TAKAHASHI MAKIKO (JP)

Application Number:

PCT/JP2013/063804

Publication Date:

December 19, 2013

Filing Date:

May 17, 2013

Export Citation:

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Assignee:

NEC CORP (JP)

International Classes:

H01M10/0569; H01M2/02; H01M4/505; H01M4/525; H01M4/58; H01M10/052

Foreign References:

JP2001085056A	2001-03-30
JP2007258067A	2007-10-04
JP2010238510A	2010-10-21
JP2001023691A	2001-01-26

Attorney, Agent or Firm:

ITO, Katsuhiro et al. (JP)
Katsuhiro Ito (JP)

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