Title:
リチウムイオン二次電池
Document Type and Number:
Japanese Patent JP5105765
Kind Code:
B2
Abstract:
The invention provides a lithium ion secondary battery comprising a positive electrode, a negative electrode and an electrolysis solution containing an aprotic solvent having an electrolyte dissolved in it, wherein the negative electrodes uses an amorphous carbon material as a negative electrode active material. The amorphous carbon material has (A) an average particle diameter (median size) of 7 mum to 20 mum inclusive as measured by a laser diffraction scattering method and (B) a particle size distribution as measured by a laser diffraction scattering method, in which distribution the ratio of particles of less than 3 mum in diameter is 1% by mass to 10% mass inclusive, and is free of an electrical conducting material.
Inventors:
Hiroshi Sakauchi
Tatsuharu Numata
Ryuichi Kasahara
Tatsuharu Numata
Ryuichi Kasahara
Application Number:
JP2006116733A
Publication Date:
December 26, 2012
Filing Date:
April 20, 2006
Export Citation:
Assignee:
NEC Energy Device Co., Ltd.
International Classes:
H01M4/133; H01M2/02; H01M4/02; H01M4/587; H01M10/05; H01M10/0525; H01M10/0566
Domestic Patent References:
| JP5036413A | ||||
| JP11135109A | ||||
| JP11246209A | ||||
| JP2005158623A | ||||
| JP2000311716A | ||||
| JP11185821A | ||||
| JP2005322420A | ||||
| JP9289012A |
Attorney, Agent or Firm:
Akira Yonezawa
Ryukichi Abe
Teiji Tanaka
Takashi Koyama
Satoshi Morikawa
Yoshiaki Minami
Ryukichi Abe
Teiji Tanaka
Takashi Koyama
Satoshi Morikawa
Yoshiaki Minami