发明名称 |
COMPOSITE PARTICLES, METHOD FOR PRODUCING SAME, ELECTRODE MATERIAL FOR SECONDARY BATTERIES, AND SECONDARY BATTERY |
摘要 |
Provided is positive electrode material for a highly safe lithium-ion secondary battery that can charge and discharge a large current while having long service life. Disclosed are composite particles comprising: particles of lithium-containing phosphate; and carbon coating comprising at least one carbon material selected from the group consisting of (i) fibrous carbon material, (ii) chain-like carbon material, and (iii) carbon material produced by linking together fibrous carbon material and chain-like carbon material, wherein each particle is coated with the carbon coating. The fibrous carbon material is preferably a carbon nanotube with an average fiber size of 5 to 200 nm. The chain-like carbon material is preferably carbon black produced by linking, like a chain, primary particles with an average particle size of 10 to 100 nm. The lithium-containing phosphate is preferably LiFePO4, LiMnPO4, LiMnXFe(1-X)PO4, LiCoPO4, or Li3V2(PO4)3. |
申请公布号 |
US2014342231(A1) |
申请公布日期 |
2014.11.20 |
申请号 |
US201214358016 |
申请日期 |
2012.11.14 |
申请人 |
DENKI KAGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
Kawasaki Takashi;Yoshino Nobuyuki;Murata Hiroshi;Sawai Takehiko;Saito Shinji;Urao Kazunori |
分类号 |
H01M4/36;H01M4/58;H01M4/04;H01M4/50 |
主分类号 |
H01M4/36 |
代理机构 |
|
代理人 |
|
主权项 |
1. Composite particles comprising:
particles of lithium-containing phosphate; and carbon coating comprising at least one carbon material selected from the group consisting of (i) fibrous carbon material, (ii) chain-like carbon material, and (iii) carbon material produced by linking together fibrous carbon material and chain-like carbon material, wherein each particle is coated with the carbon coating. |
地址 |
Tokyo JP |