COMPOSITE METAL OXIDE, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY USING THE SAME, AND LITHIUM ION SECONDARY BATTERY

Japanese Patent JP2014197523

A

PROBLEM TO BE SOLVED: To provide a composite metal oxide excellent in charging and discharging cycle characteristics, a positive electrode for a lithium ion secondary battery, and a lithium ion secondary battery.SOLUTION: The composite metal oxide is a lithium nickel cobalt manganese oxide, and has a layer shape rock-salt structure. Mole fractions of the Ni-O octahedron, Co-O octahedron, and Mn-O octahedron in the total composite metal oxide are represented by Ni-O octahedron:Co-O octahedron:Mn-O octahedron=b1:c1:d1 (where, b1+c1+d1=1, 0