LITHIUM-MANGANESE-NICKEL COMPLEX OXIDE, MANUFACTURING METHOD OF THE SAME, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY POSITIVE ELECTRODE ACTIVATOR, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a lithium-manganese-nickel complex oxide with high tap density, substantially not including different phases, usable as a lithium ion secondary battery positive electrode activator.

SOLUTION: Mixed aqueous solution of manganese salt and nickel salt is prepared so that a ratio of manganese atom and nickel atom substantially fulfills a general formula: Li1+XMn2-Y-XNiYO4(wherein, -0.05≤X≤0.10, 0.45≤Y≤0.55), and the mixed aqueous solution and alkaline aqueous solution are concurrently and continuously put into a reaction chamber without using any complexing agent. The complex compound is co-precipitated while keeping the temperature and pH of the mixed aqueous solution within the range of 60°C to 80°C and 10 to 11 respectively, and filtered and cleaned by water. The lithium-manganese-nickel complex oxide is obtained by sintering the above compound. The above complex oxide and a lithium compound are mixed and sintered so that a ratio of the sum of manganese atom and nickel atom to lithium atom substantially becomes 2 : 0.95 to 1.10.

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