发明名称 |
POSITIVE ELECTRODE MATERIAL FOR NONAQUEOUS ELECTROLYTE RECHARGEABLE BATTERIES, METHOD FOR PRODUCING POSITIVE ELECTRODE MATERIAL, ELECTRODE FOR NONAQUEOUS ELECTROLYTE RECHARGEABLE BATTERIES, NONAQUEOUS ELECTROLYTE RECHARGEABLE BATTERIES AND METHOD OF PRODUCTION THEREFOR |
摘要 |
An object of the present invention is to provide a positive active material for a nonaqueous electrolyte secondary battery which has a large discharge capacity and is superior in charge-discharge cycle performance, initial efficiency and high rate discharge performance, and a nonaqueous electrolyte secondary battery using the positive active material. The present invention pertains to a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide which has a crystal structure of an ±-NaFeO 2 type, is represented by a compositional formula Li 1+± Me 1-± O 2 (Me is a transition metal element including Co, Ni and Mn, ± > 0), and has a molar ratio Li/Me of Li to the transition metal element Me of 1.2 to 1.6, wherein a molar ratio Co/Me of Co in the transition metal element Me is 0.02 to 0.23, a molar ratio Mn/Me of Mn in the transition metal element Me is 0.62 to 0.72, and the lithium transition metal composite oxide is observed as a single phase attributed to a space group R3-m on an X-ray diffraction chart when it is electrochemically oxidized up to a potential of 5.0 V (vs. Li/Li + ). |
申请公布号 |
EP2660907(A1) |
申请公布日期 |
2013.11.06 |
申请号 |
EP20110852696 |
申请日期 |
2011.12.27 |
申请人 |
GS YUASA INTERNATIONAL LTD. |
发明人 |
ENDO, DAISUKE;KATAYAMA , YOSHIHIRO;MURAI , TETSUYA;SHIBATA, MASAFUMI |
分类号 |
H01M4/525;C01G53/00;H01B1/08;H01M4/505;H01M10/052;H01M10/44 |
主分类号 |
H01M4/525 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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