| 发明名称 |
MODIFIED TERNARY MATERIAL AND PRECURSOR THEREOF AND PREPARATION METHODS FOR MODIFIED TERNARY MATERIAL AND PRECURSOR |
| 摘要 |
A precursor of a modified ternary material for a lithium ion battery positive material belongs to the technical field of application of lithium ion battery positive materials. A molecular formula of the precursor is: (Ni1/3Co1/3Mn1/3)(OH)2, and the precursor consists of three layers. An inner layer of the precursor is a ternary material with the Co content of more than ⅓ and equal Ni and Mn content, and the molecular formula of the inner layer of the precursor is: (Ni1/3−xCo1/3+2xMn1/3−x(OH)2, where 0<x≦⅓. An outer layer of the precursor is a ternary material with the Co content of 0 to ⅓ and equal Ni and Mn content, and the molecular formula of the outer layer of the precursor is: (Ni0.5−yCo2yMn0.5−y)(OH)2, where 0≦y<⅙. An intermediate layer of the precursor is a concentration gradient composite material of the two materials of the inner layer and the outer layer of the precursor. The modified ternary material containing the precursor has the chemical formula of Li(Ni1/3CO1/3Mn1/3)O2. The inside of each microscopic particle of the ternary material consists of three parts, namely, an inner layer, an intermediate layer and an outer layer. The present invention effectively improves the cyclic stability, thermal stability and compacted density, and has a high cost-performance advantage. |
| 申请公布号 |
US2014272590(A1) |
申请公布日期 |
2014.09.18 |
| 申请号 |
US201214355537 |
申请日期 |
2012.10.26 |
| 申请人 |
SHANGHAI PYLON TECHNOLOGY CO., LTD. |
发明人 |
Zhang Jun;Guo Jian;Zhang Lianqi;Yang Ruijuan;Hou Peiyu |
| 分类号 |
H01M4/36;H01M4/1391;H01M4/04 |
主分类号 |
H01M4/36 |
| 代理机构 |
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代理人 |
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| 主权项 |
1. A precursor of a modified ternary material for a lithium ion battery positive electrode material, wherein the precursor has a composition of the following molecular formula: Ni1/3Co1/3Mn1/3(OH)2;
and consists of three layers, wherein: an inner layer of the precursor is a ternary material with a cobalt content of greater than ⅓ and identical nickel and manganese contents, and the molecular formula of said inner layer of the precursor is: (Ni1/3−xCo1/2+2xMn1/3)(OH)2, where 0<x≦⅓; an outer layer of the precursor is a ternary material with a cobalt content of 0 to ⅓ and equal nickel and manganese contents, and the molecular formula of said outer layer of the precursor is: (Ni0.5−yCo2yMn0.5−y)(OH)2, where 0<y≦⅙; and an intermediate layer of the precursor is a concentration-gradient composite material of the above two materials of the inner layer and the outer layer of the precursor. |
| 地址 |
Shanghai CN |
