Title:
LITHIUM ION BATTERY, AND BATTERY MODULE UTILIZING SAME
Document Type and Number:
WIPO Patent Application WO/2012/039477
Kind Code:
A1
Abstract:
The present invention provides: a lithium ion battery which comprises a negative electrode that contains a negative electrode active material capable of absorbing and desorbing lithium, a positive electrode, a nonaqueous electrolyte and a nonaqueous solvent; a battery module which uses the lithium ion battery; and a power storage system for a mobile body and a stationary power storage system. The negative electrode active material is composed of composite carbon particles, each of which has a coating layer of low crystallinity carbon on the surface of a graphite nucleus material. The coating layer has functional groups, namely C=O groups, C-OH groups and C-O groups on the surface, and the ratio of oxygen atoms in the total of carbon atoms and oxygen atoms contained in the coating layer is from 2 atom% to 5 atom%. The negative electrode active material has at least one peak respectively in a temperature range not less than 350˚C but less than 600˚C and in a temperature range from 600˚C to 850˚C (inclusive) as determined by thermogravimetric measurement, and the peak temperature difference between an oxidation peak that has the highest peak temperature within the temperature range from 350˚C to 850˚C (inclusive) and an oxidation peak that has the lowest peak temperature within the temperature range from 350˚C to 850˚C (inclusive) is 300˚C or less.
Inventors:
NISHIMURA ETSUKO (JP)
TANAKA AKIHIDE (JP)
FEN KOHRYOH (JP)
HONBOU HIDETOSHI (JP)
TANAKA AKIHIDE (JP)
FEN KOHRYOH (JP)
HONBOU HIDETOSHI (JP)
Application Number:
PCT/JP2011/071705
Publication Date:
March 29, 2012
Filing Date:
September 22, 2011
Export Citation:
Assignee:
HITACHI CHEMICAL CO LTD (JP)
NISHIMURA ETSUKO (JP)
TANAKA AKIHIDE (JP)
FEN KOHRYOH (JP)
HONBOU HIDETOSHI (JP)
NISHIMURA ETSUKO (JP)
TANAKA AKIHIDE (JP)
FEN KOHRYOH (JP)
HONBOU HIDETOSHI (JP)
International Classes:
H01M4/587; H01M4/36; H01M4/505; H01M4/525; H01M4/58; H01M10/052; H01M10/0525
Foreign References:
| JP2003151533A | 2003-05-23 | |||
| JP2007123142A | 2007-05-17 | |||
| JP2003059490A | 2003-02-28 | |||
| JPH11317228A | 1999-11-16 | |||
| JP2000306582A | 2000-11-02 | |||
| JP2009029677A | 2009-02-12 | |||
| JP2004207252A | 2004-07-22 | |||
| JP2009187924A | 2009-08-20 |
Attorney, Agent or Firm:
HIZATATE, Shoji et al. (JP)
膝舘 Yoshiharu (JP)
膝舘 Yoshiharu (JP)
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Claims: