发明授权
US08790824B2 Graphite anode active material for use in lithium secondary battery
有权
用于锂二次电池的石墨阳极活性材料
- 专利标题: Graphite anode active material for use in lithium secondary battery
- 专利标题(中): 用于锂二次电池的石墨阳极活性材料
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申请号: US13814145申请日: 2011-08-05
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公开(公告)号: US08790824B2公开(公告)日: 2014-07-29
- 发明人: Chiaki Sotowa , Takahiro Tamura
- 申请人: Chiaki Sotowa , Takahiro Tamura
- 申请人地址: JP Tokyo
- 专利权人: Showa Denko K.K.
- 当前专利权人: Showa Denko K.K.
- 当前专利权人地址: JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2010-176783 20100805
- 国际申请: PCT/JP2011/004453 WO 20110805
- 国际公布: WO2012/017676 WO 20120209
- 主分类号: H01M4/02
- IPC分类号: H01M4/02
摘要:
By a method that includes coking a residue resulting from distillation of crude oil under reduced pressure and having API gravity of 1 to 5, an asphaltene content of 10 to 50%, a resin content of 5 to 30%, and a sulfur content of 1 to 12% to obtain coke, pulverizing the coke to obtain a carbon powder, and heating the carbon powder at 1000 to 3500 deg C., a graphite anode active material for use in a lithium secondary battery is obtained that has, in X-ray powder diffraction, d002 of not smaller than 0.3354 nm and not greater than 0.337 nm, Lc(004) of smaller than 100 nm, La(110) of not smaller than 100 nm, and a half width of the peak of a plane (101) at a diffraction angle (2θ) of 44 degrees to 45 degrees of not smaller than 0.65 degree.
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