发明名称 |
Positive electrode active material for non-aqueous electrolyte secondary battery and production method for same, precursor for positive electrode active material, and non-aqueous electrolyte secondary battery using positive electrode active material |
摘要 |
Provided is a cathode active material for a non-aqueous electrolyte secondary battery capable of obtaining high initial discharge capacity and good output characteristics at low temperature. In order to achieve this, a cathode active material that is a lithium nickel composite oxide composed of secondary particles that are an aggregate of primary particles is expressed by the general expression: Liw(Ni1-x-yCoxAly)1-zMzO2 (where 0.98≦w≦1.10, 0.05≦x≦0.3, 0.01≦y≦0.1, 0≦z≦0.05, and M is at least one metal element selected from a group consisting of Mg, Fe, Cu, Zn and Ga), and where the crystallite diameter at (003) plane of that lithium nickel composite oxide that is found by X-ray diffraction and the Scherrer equation is within the range of 1200 {acute over (Å)} to 1600 {acute over (Å)} is used as the cathode material. |
申请公布号 |
US8999573(B2) |
申请公布日期 |
2015.04.07 |
申请号 |
US201113638171 |
申请日期 |
2011.03.24 |
申请人 |
Sumitomo Metal Mining Co., Ltd. |
发明人 |
Kase Katsuya;Oda Syuhei;Kuzuo Ryuichi;Oyama Yutaka |
分类号 |
H01M4/02;H01M4/525;H01M4/485;C01G53/00;H01M10/052;H01M10/0525 |
主分类号 |
H01M4/02 |
代理机构 |
Finnegan, Henderson, Farabow, Garrett & Dunner LLP |
代理人 |
Finnegan, Henderson, Farabow, Garrett & Dunner LLP |
主权项 |
1. A cathode active material for a non-aqueous electrolyte secondary battery, comprising:
secondary particles that are an aggregate of primary particles of a lithium nickel composite oxide expressed by the general expression:
Liw(Ni1-x-yCoxAly)1-zMzO2 where 0.98≦w≦1.10, 0.05≦x≦0.3, 0.01≦y≦0.1, 0≦z≦0.05, and M is at least one metal element chosen from Mg, Fe, Cu, Zn and Ga, and where the crystallite diameter at (003) plane of the lithium nickel composite oxide that is found by X-ray diffraction and the Scherrer equation is within the range of 1200 Å to 1600 Å. |
地址 |
Tokyo JP |