发明申请
- 专利标题： Non-aqueous electrolyte secondary battery-use cathode material, production method therefor, non-aqueous electrolyte secondary battery-use cathode and non-aqueous electrolyte secondary battery using the cathode material
- 专利标题（中）： 非水电解质二次电池用正极材料及其制造方法，使用正极材料的非水电解质二次电池用阴极及非水电解质二次电池
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申请号： US10570349申请日： 2004-09-02
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公开(公告)号： US20070015056A1公开(公告)日： 2007-01-18
- 发明人: Kouichi Takei , Kiyoshi Suzuki , Tatsuya Nishida , Hideyuki Inomata , Hiroshi Nakagawa , Katsuya Imai , Yoshihiro Shoji , Masayuki Terasaka
- 申请人： Kouichi Takei , Kiyoshi Suzuki , Tatsuya Nishida , Hideyuki Inomata , Hiroshi Nakagawa , Katsuya Imai , Yoshihiro Shoji , Masayuki Terasaka
- 优先权： JP2003=314675 20030905
- 国际申请： PCT/JP04/12726 WO 20040902
- 主分类号： H01M4/58
- IPC分类号： H01M4/58 ; H01M4/62 ; H01M4/04
摘要：
In order to provide a nonaqueous electrolyte secondary battery negative electrode material that has an excellent discharging capacity, the charge/discharge efficiency and the charge load characteristics, a manufacturing method thereof, a nonaqueous electrolyte secondary battery negative electrode with the negative electrode material and a nonaqueous electrolyte secondary battery, the invention provides a nonaqueous electrolyte secondary battery negative electrode material including graphite particles that have a block-like structure where a plurality of flat graphite fine particles assembles or bonds non-parallel with each other, the aspect ratio of 5 or less and a volume of fine pores in the range of 10 to 105 nm in a volume of 400 to 2000 cm3/kg; and a layer of carbon formed on a surface of the graphite particle, wherein a ratio (by weight ratio) of the layer of carbon to the graphite particle is in the range of 0.001 to 0.01, a manufacturing method thereof, a nonaqueous electrolyte secondary battery negative electrode with the negative electrode material and a nonaqueous electrolyte secondary battery.