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POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION

2022-12-14  |  百检 260浏览

作者:TOKORO,Hisato | TAKAHASHI SHIN | GUNJI,Akira | TAKANO,Shuichi | TOYAMA,Tatsuya | NAKAJIMA,Genei

申请者:HITACHI METALS, LTD.

发明人:TOKORO,Hisato | TAKAHASHI SHIN | GUNJI,Akira | TAKANO,Shuichi | TOYAMA,Tatsuya | NAKAJIMA,Genei 年:2022,

语种:英语

公开国家:KR 国家:韩国

专利申请号:KR10-2021-7041452 专利申请日期:2018-12-26

公开(公告)号:KR10-2354265B1 公开日期:2022-01-21

优先权号:JP2017252400 | 2017JP-0252400 | KR20207003253 | 2020KR-7003253 | WOJP2018047888 | 2018WO-JP47888

分类号:H01M 4/525 20100101AFI20220121BHKR 国际主分类号:H01M 4/525 20100101AFI20220121BHKR 国际分类号:H01M-4/525 | C01G-53/00 | H01M-4/505 | H01M-10/052 CPC分类号:H01M-004/505 | C01G-053/50 | C01G-053/42 | C01P-2004/03 | C01P-2004/54 | C01P-2006/12 | C01P-2002/54 | C01P-2002/52 | C01P-2004/45 | C01P-2004/51 | C01P-2004/61 | C01P-2004/62 | C01P-2006/16 | H01M-2004/028 | H01M-004/131 | H01M-010/052 | Y02E-060/10 | H01M-004/525 | C01G-053/44 | C01P-2004/50 | C01P-2006/14 | C01P-2006/40 | H01M-010/0525 | H01M-2004/021

法律状态:GRANTED

摘要:

The present invention provides a positive electrode active material for a lithium ion secondary battery having high breaking strength of secondary particles constituting powder and excellent coating properties, a method for producing a positive electrode active material for a lithium ion secondary battery, and a lithium ion secondary battery. A positive electrode active material for lithium ion secondary batteries includes primary particles of a lithium composite compound represented by the following formula (1) and secondary particles in which the primary particles are aggregated. a ratio of an average particle diameter of the primary particles to an average particle diameter of the secondary particles is 0.006 or more and 0.25 or less, an amount of lithium carbonate is 0.4% by mass or less, and a breaking strength of the secondary particles is 30 MPa or more. (In the formula (1), M1 is at least one element selected from the group consisting of Mn and Al, m2 is at least one element selected from the group consisting of Mg, Ti, Zr, Mo and Nb, and -0.1 ≦ a ≦ 0.2, 0.7 ≦ x < 1.0, 0 ≦ y < 0.3, 0 ≦ z ≦ 0.25, 0 < 1-x-y-z < 0.3, and -0.2 ≦ α ≦ 0.2.)