| 发明名称 | Cathode active material and lithium secondary battery containing them | ||
| 摘要 | Provided is a non-aqueous electrolyte-based, high-power lithium secondary battery having a long service life and superior safety at both room temperature and high temperature, even after repeated high-current charging and discharging. The battery comprises a mixture of a lithium/manganese spinel oxide having a substitution of a manganese (Mn) site with a certain metal ion and a lithium/nickel/cobalt/manganese composite oxide, as a cathode active material. | ||
| 申请公布号 | US9269951(B2) | 申请公布日期 | 2016.02.23 |
| 申请号 | US201414537979 | 申请日期 | 2014.11.11 |
| 申请人 | LG Chem, Ltd. | 发明人 | Ryu Ji Heon;Kim Min Su;Hyun Jung Eun;Lee Jaepil;Lee Eun Ju;Shin Youngjoon |
| 分类号 | H01M4/36;H01M10/052;H01M4/505;H01M4/525;H01M10/0525;H01M4/02 | 主分类号 | H01M4/36 |
| 代理机构 | Lerner, David, Littenberg, Krumholz & Mentlik, LLP | 代理人 | Lerner, David, Littenberg, Krumholz & Mentlik, LLP |
| 主权项 | 1. A cathode active material for a lithium secondary battery, comprising a mixture of a lithium/manganese spinel oxide represented by Formula I and a lithium/nickel/cobalt/manganese oxide represented by Formula II: Li1+xMn2-yMyO4 (I) Li1+zNibMncCo1−(b+c)O2 (II) wherein, M is a metal having an oxidation number of 2 to 3; 0<x≦0.2; 0<y≦0.2; 0.1≦z≦0.1; 0.45≦b≦65; 0.2≦c≦0.4; and 0.65≦b+c≦0.85 wherein the mixing ratio of the lithium/manganese spinel oxide of Formula I to the lithium/nickel/cobalt/manganese composite oxide of Formula II is in the range of 10:90 to 90:10 (w/w); and wherein the cathode active material exhibits the life characteristics that the capacity at 300 cycles is more than 80% relative to the initial capacity. | ||
| 地址 | KR | ||