LITHIUM SECONDARY CELL - NGK INSULATORS LTD

Title:

LITHIUM SECONDARY CELL

Document Type and Number:

WIPO Patent Application WO/2001/073884

Kind Code:

A1

Abstract:

A lithium secondary cell which has an electrode body containing a positive electrode plate and a negative electrode plate being wound or laminated via a separator and a nonaqueous electrolytic solution containing a lithium compound as an electrolyte, characterized in that at least one of the positive electrode plate, the negative electrode plate the separator and the nonaqueous electrolytic solution comprises at least one of (a) an organic or inorganic inhibitor which is a Cu corrosion inhibitor or a Cu trapping agent, (b) a compound having an organic base moiety and an inorganic moiety in one molecule thereof, (c) a cyclic compound containing a N-O radical in the molecule thereof, (d) a cyclic compound which acts as a donor of Mn?+2� in the nonaqueous electrolytic solution, (e) a compound containing an atom exhibiting Lewis acidity and an atom exhibiting Lewis basicity in one molecule thereof, (f) a three dimension type siloxane compound, and (g) a nonionic surfactant, or the nonaqueous electrolytic solution comprises (h) a water extracting agent or (i) a hydrofluoric acid extracting agent. The lithium secondary cell is improved in self-discharge characteristics, cycle characteristics, long-term stability and reliability.

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Inventors:

YANG LI (JP)
YOSHIDA TOSHIHIRO (JP)
NEMOTO HIROSHI (JP)
TAKAHASHI MICHIO (JP)

Application Number:

PCT/JP2001/001135

Publication Date:

October 04, 2001

Filing Date:

February 16, 2001

Export Citation:

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Assignee:

NGK INSULATORS LTD (JP)
YANG LI (JP)
YOSHIDA TOSHIHIRO (JP)
NEMOTO HIROSHI (JP)
TAKAHASHI MICHIO (JP)

International Classes:

H01M4/13; H01M10/052; H01M10/0567; H01M10/36; H01M50/571; H01M10/0525; H01M10/42; H01M50/409; (IPC1-7): H01M10/40

Foreign References:

JP2000077103A	2000-03-14
JPH11273683A	1999-10-08
JPH1167233A	1999-03-09
JPH09139233A	1997-05-27
JPH11126633A	1999-05-11
JPH0660877A	1994-03-04
JPH1116602A	1999-01-22
JP2000012080A	2000-01-14
JP2000058123A	2000-02-25
JP2000268861A	2000-09-29

Other References: