A METHOD OF PREPARING POSITIVE ACTIVE MATERIAL PRECURSOR FOR LITHIUM BATTERY, POSITIVE ACTIVE MATERIAL FOR LITHIUM BATTERY WITH CONCENT RATION GRANDIENTS USING BATCH REACTOR, AND POSITIVE ACTIVE MATERIAL PRECURSOR FOR LITHIUM BATTERY, POSITIVE ACTIVE MATERIAL FOR LITHIUM BATTERY MADE BY THE SAME
- 申请公布号：
- KR20110083383(A)
- 申请号：
- KR20100003580
- 申请日期：
- 2010.01.14
- 申请公布日期：
- 2011.07.20
- 申请人：
- ECOPRO CO., LTD.
- 发明人：
- YU, JONG RYEOL;CHOI, SEUNG PHIL;SHIN, KYUNG;CHOI, MOON HO
- 分类号：
- H01M4/505;C01B13/14;H01M4/525;H01M10/0525
- 主分类号：
- H01M4/505
- 摘要：
- PURPOSE: A method for preparing a positive electrode active material precursor for a lithium secondary battery and a method for manufacturing a positive electrode active material are provided to form a concentration gradient layer by controlling the concentration of a precursor aqueous solution and the concentration of a chelating agent according to a reaction progress process. CONSTITUTION: A method for manufacturing a positive electrode active material precursor for a lithium secondary battery comprises the steps of: injecting a chelating agent aqueous solution into a batch reactor; successively injecting a first precursor solution, a chelating agent aqueous solution, and a basic solution into the reactor to obtain spherical precipitates constituting a core layer; successively injecting a second precursor aqueous solution, chelating agent aqueous solution, and basic solution to obtain precipitates constituting a concentration gradient layer on the surface of the core layer in which the concentration of nickel maganese cobalt is gradually changed; successively injecting a third precursor aqueous solution, chelating agent aqueous solution, and basic solution to obtain precipitates constituting a shell layer on the surface of the concentration gradient layer; and drying and heating the precipitates.
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