LITHIUM ION SECONDARY BATTERY - NEC ENERGY DEVICES LTD

Title:

LITHIUM ION SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2012/014793

Kind Code:

A1

Abstract:

Disclosed is a lithium ion secondary battery with little reduction in battery capacity during rapid charging and with high energy density. Specifically disclosed is a lithium ion secondary battery wherein a cathode contains a lithium-nickel manganese oxide indicated by the formula (I) LixNiaM1bMn2-a-bO4 (wherein, M1 is at least one type selected from a group formed from Ti, Si, Co, Fe, Cr, Al, Mg, B, and Li; 0＜x≦1, 0.4≦a≦0.6, and 0≦b≦0.4.) and which has a specific surface area of 0.2-1 m2g-1, and an anode contains a lithium titanium oxide indicated by the formula (II) LiyTi5/3-cM2cO4 (wherein M2 is at least one type selected from a group formed by Ta, Zr, Cr, Ni, and V. 4/3≦y≦7/3 and 0≦ｃ＜0.1.) and which has a specific surface area of 4-20 m2g-1.+

Inventors:

TAMURA HIDETOSHI (JP)
NOGUCHI TAKEHIRO (JP)
UEHARA MAKIKO (JP)

Application Number:

PCT/JP2011/066657

Publication Date:

February 02, 2012

Filing Date:

July 22, 2011

Export Citation:

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Assignee:

NEC ENERGY DEVICES LTD (JP)
TAMURA HIDETOSHI (JP)
NOGUCHI TAKEHIRO (JP)
UEHARA MAKIKO (JP)

International Classes:

H01M4/485; H01M10/0525; H01M4/505; H01M4/525

Foreign References:

JP2000235857A	2000-08-29
JP2000156229A	2000-06-06
JP2007087875A	2007-04-05
JP2005317512A	2005-11-10
JP2001176557A	2001-06-29
JP2000235857A	2000-08-29
JP2000156229A	2000-06-06
JP2006066341A	2006-03-09
JP2010169248A	2010-07-28

Other References: