| 发明名称 |
CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND PREPARATION METHOD THEREOF |
| 摘要 |
PURPOSE: A cathode active material for lithium secondary battery is provided to improve the cycle life, capacity and service life at high temperature of a battery, due to its electrochemical stability in a wide range of voltage. CONSTITUTION: The cathode active material for a lithium secondary battery having 0.1-20 micrometer of particle size, comprises: a compound selected from Lix£Li(y/3)A(2y/3)Co(1-y)|O2zBO2 and Lix£Li(y/3)A(2y/3)Co(1-y)|O2zLi2BO3, in which A is selected from Ti, Mn and Ni; B is selected from Zr, Mo, Ru and Sn; and x, y and z satisfy the following inequalities: 0.9<x<1.1, 0<y<0.5 and 0<z<0.5. The positive electrode active material is prepared by a liquid phase method comprising the steps of: (i) preparing a mixed solution of: a water soluble compound containing cobalt; a water soluble compound containing lithium; and a water soluble compound containing at least one selected from Ti, Mn and Ni; (ii) adding a chelating agent to the solution from the step (i) to give a gel; and (iii) heating and milling the gel obtained from the step (ii). |
| 申请公布号 |
KR20040058667(A) |
申请公布日期 |
2004.07.05 |
| 申请号 |
KR20020085037 |
申请日期 |
2002.12.27 |
| 申请人 |
JES E CHEM;LG CHEM. LTD.;OH, SEUNG MO |
发明人 |
KANG, EUN YEONG;LEE, JONG HWA;OH, SEUNG MO;SONG, JUN HO |
| 分类号 |
H01M4/38;H01M4/04;(IPC1-7):H01M4/58 |
主分类号 |
H01M4/38 |
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