发明授权
- 专利标题: Cathode material for lithium secondary battery and manufacturing method thereof
- 专利标题(中): 锂二次电池用正极材料及其制造方法
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申请号: US11718021申请日: 2005-10-13
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公开(公告)号: US07799301B2公开(公告)日: 2010-09-21
- 发明人: Yoshio Kajiya , Hiroshi Tasaki
- 申请人: Yoshio Kajiya , Hiroshi Tasaki
- 申请人地址: JP Tokyo
- 专利权人: Nippon Mining & Metals Co., Ltd.
- 当前专利权人: Nippon Mining & Metals Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Howson & Howson LLP
- 优先权: JP2004-318718 20041102
- 国际申请: PCT/JP2005/018843 WO 20051013
- 国际公布: WO2006/049001 WO 20060511
- 主分类号: C01D1/00
- IPC分类号: C01D1/00
摘要:
Provided is a cathode material for a lithium secondary battery composed of an aggregate of Li-A-O composite oxide particles (wherein A represents one or more metal elements selected from Mn, Fe, Co and Ni), wherein the lithium composite oxide contains 20 to 100 ppm (by mass) of P, and the total content of impurity elements excluding essential components is 2000 ppm or less. Also provided is a manufacturing method of such a cathode material for a lithium secondary battery including the steps of suspending lithium carbonate in water and thereafter introducing a metallic salt solution of one or more metal elements selected from Mn, Fe, Co and Ni in the lithium carbonate suspension, adding a small amount of phosphoric acid so that the P content in the Li-A-O composite oxide particles will be 20 to 100 ppm (by mass), and forming an aggregate of Li-A-O composite oxide particles containing 20 to 100 ppm (by mass) of P by filtering, cleansing, drying and thereafter oxidizing the obtained carbonate. This cathode material for a lithium secondary battery and its manufacturing method realize improved sinterability and battery characteristics.