发明申请
- 专利标题: POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, METHOD FOR MANUFACTURING THE SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING SAID POSITIVE ELECTRODE ACTIVE MATERIAL
- 专利标题(中): 用于非电解电解质二次电池的正极电极活性材料,其制造方法和使用正电极活性材料的非电解电解质二次电池
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申请号: US14696745申请日: 2015-04-27
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公开(公告)号: US20150228974A1公开(公告)日: 2015-08-13
- 发明人: Rei Kokado , Kensaku Mori
- 申请人: Sumitomo Metal Mining Co., Ltd.
- 优先权: JP2010-221587 20100930
- 主分类号: H01M4/36
- IPC分类号: H01M4/36 ; H01M4/525 ; H01M4/505 ; H01M4/131
摘要:
Provided is a method for manufacturing the positive electrode active material for nonaqueous electrolyte secondary batteries, the method comprising: a first step, wherein an alkaline solution with a tungsten compound dissolved therein is added to and mixed with a lithium metal composite oxide powder represented by a general formula LizNi1—x—yCoxMyO2 (wherein, 0.10≦x≦0.35, 0≦y≦0.35, 0.97≦Z≦1.20, and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti, and Al), including primary particles and secondary particles composed of aggregation of the primary particles, and thereby W is dispersed on a surface of the primary particles; and a second step, wherein, by heat treating the mixture of the alkaline solution with the tungsten compound dissolved therein and the lithium metal composite oxide powder, fine particles containing W and Li are formed on a surface of the primary particles.
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