| 发明名称 |
POSITIVE ACTIVE MATERIAL AND LITHIUM-ION SECONDARY BATTERY |
| 摘要 |
The present disclosure provides a positive active material and a lithium-ion secondary battery. The positive active material comprises LiCoO2 (LCO) and LiFexMn1-xPO4 (LFMP), 0<x≦0.4; a mass ratio of LiFexMn1-xPO4 to LiCoO2 is m, and 0<m≦0.45; LiFexMn1-xPO4 is a polycrystalline particle with an olivine structure; LiCoO2 is a polycrystalline particle with a laminated structure; an average particle diameter D50 of the polycrystalline particle of LiFexMn1-xPO4 is smaller than an average particle diameter D50 of the polycrystalline particle of LiCoO2, and the polycrystalline particle of LiFexMn1-xPO4 is filled in the polycrystalline particle of LiCoO2. The lithium-ion secondary battery comprises the aforementioned positive active material. The lithium-ion secondary battery of the present disclosure has a high voltage platform and a high energy density, and also has an excellent rate performance, an excellent cycle performance and an excellent safety performance. |
| 申请公布号 |
US2015349330(A1) |
申请公布日期 |
2015.12.03 |
| 申请号 |
US201514723273 |
申请日期 |
2015.05.27 |
| 申请人 |
Nindge Amperex Technology Limited |
发明人 |
CHONG Jin |
| 分类号 |
H01M4/36;H01M4/131;H01M4/58;H01M4/525;H01M4/136;H01M10/0525 |
主分类号 |
H01M4/36 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A positive active material, comprising LiCoO2 (LCO) and LiFexMn1-xPO4 (LFMP), 0<x≦0.4;
a mass ratio of LiFexMn1-xPO4 to LiCoO2 being m, and 0<m≦0.45; LiFexMn1-xPO4 being a polycrystalline particle with an olivine structure; LiCoO2 being a polycrystalline particle with a laminated structure; an average particle diameter D50 of the polycrystalline particle of LiFexMn1-xPO4 being smaller than an average particle diameter D50 of the polycrystalline particle of LiCoO2, and the polycrystalline particle of LiFexMn1-xPO4 being filled in the polycrystalline particle of LiCoO2. |
| 地址 |
Ningde CN |
