发明授权
- 专利标题： Lithium-cobalt composite oxide, process for its production, positive electrode for lithium secondary cell employing it, and lithium secondary cell
- 专利标题（中）： 锂钴复合氧化物，其制造方法，使用锂二次电池的正极和锂二次电池
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申请号： US10743479申请日： 2003-12-23
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公开(公告)号： US07306779B2公开(公告)日： 2007-12-11
- 发明人: Manabu Suhara , Kazuo Sunahara , Naoshi Saitoh , Tsutomu Katoh
- 申请人： Manabu Suhara , Kazuo Sunahara , Naoshi Saitoh , Tsutomu Katoh
- 申请人地址： JP Chigasaki
- 专利权人： Seimi Chemical Co., Ltd.
- 当前专利权人： Seimi Chemical Co., Ltd.
- 当前专利权人地址： JP Chigasaki
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权： JP11-287781 19991008; JP11-287785 19991008; JP2000-028860 20000207
- 主分类号： C01G51/00
- IPC分类号： C01G51/00
摘要：
A composite oxide suitable for an active material of a positive electrode for a lithium secondary cell which can be used in a wide range of voltage, has a large electric capacity and excellent low temperature performance and is excellent in the durability for charge-discharge cycles and highly safe, a process for its production, and a positive electrode and a cell employing it, are presented.The composite oxide is a lithium-cobalt composite oxide which is represented by the formula LiCo1-xMxO2, (wherein 0≦x≦0.02 and M is at least one member selected from the group consisting of Ta, Ti, Nb, Zr and Hf), and which has a half-width of the diffraction peak for (110) face at 2θ=66.5±1°, of from 0.070 to 0.180°, as measured by the X-ray diffraction using CuKα as a ray source.
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