摘要 |
To provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which if used as a positive electrode for a lithium ion secondary battery, the battery internal resistance can be reduced, giving a secondary battery superior in output characteristics and life property. After mixing raw material powders in specified quantities of each so as to become a lithium-metal complex oxide represented by Li z Ni 1-w M w O 2 (wherein M is at least one kind or more of metal elements selected from the group consisting of Co, Al, Mg, Mn, Ti, Fe, Cu, Zn, and Ga; and w and z respectively satisfy 0<w‰¤0.25, and 1.0‰¤z‰¤1.1), baking is performed in two stages. At first the temperature is raised from room temperature to a first stage baking temperature (450 to 550°C) at a temperature rise rate of 0.5 and 15°C/min, and held for 1 to 10 hours. Then the temperature is raised to a second stage baking temperature (650 to 800°C), and held for 0.6 to 30 hours. |
申请人 |
SUMITOMO METAL MINING CO., LTD.;TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
ODA, SYUUHEI;KUZUO, RYUICHI;UEKI, TOMOYOSHI;SUZUKI, SATORU;YAMADA, MANABU |