Title:
リチウムイオン二次電池、及び、リチウムイオン二次電池の充電方法
Document Type and Number:
Japanese Patent JP4087343
Kind Code:
B2
Abstract:
A lithium-ion secondary battery device comprises a positive electrode collector having a surface formed with a positive electrode active material layer containing a positive electrode active material; a negative electrode collector having a surface formed with a negative electrode active material layer containing a negative electrode active material; an electrically insulating porous separator; and an electrolyte containing a lithium salt and being in contact with the positive electrode active material layer, negative electrode active material layer, and separator. The negative electrode active material is a carbon material having a graphite structure. The amount of the carbon material supported by the negative electrode active material layer is 2.0 to 4.0 mg/cm2. The graphite structure in an X-ray diffraction pattern of the carbon material exhibits a peak intensity P101 of (101) plane and a peak intensity P100 of (100) plane having a ratio (P101/P100) of 2.0 to 2.8 therebetween.
Inventors:
Kazunari Ogawa
Tsuyoshi Iijima
Satoshi Maruyama
Tsuyoshi Iijima
Satoshi Maruyama
Application Number:
JP2004050356A
Publication Date:
May 21, 2008
Filing Date:
February 25, 2004
Export Citation:
Assignee:
tdk Corporation
International Classes:
H01M10/05; H01M4/13; H01M4/133; H01M4/587; H01M4/62; H01M10/04; H01M10/0525; H01M10/0585; H01M10/44; H01M6/16; H01M6/42; H01M50/119; H01M50/121; H01M50/124; H01M50/136
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Attorney, Agent or Firm:
Yoshiki Hasegawa
Shiro Terasaki
Toyotaka Abe
Takashi Mikami
Shiro Terasaki
Toyotaka Abe
Takashi Mikami