POSITIVE POLE MATERIAL FOR LITHIUM SECONDARY BATTERY AND BATTERY

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PROBLEM TO BE SOLVED : To provide a lithium secondary battery which attains both higher safety and higher output. SOLUTION : In a positive material for the lithium secondary battery, a compound oxide having a layered structure including at least Li, Ni, Mn and Co includes a rare earth element(s) of at least one or more kinds other than the elements described above.