ACTIVE MATERIAL, METHOD FOR PRODUCING ACTIVE MATERIAL, ELECTRODE, LITHIUM ION SECONDARY BATTERY, AND METHOD FOR MANUFACTURING LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an active material which can improve a discharge capacity of a lithium ion secondary battery.

SOLUTION: A method for producing an active material according to the present invention comprises: a first step of heating a mixture including a lithium source, a phosphate source, a vanadium source and water to 150-190°C under increased pressure to produce a precursor in the mixture and adjusting a pH of the mixture including the precursor to 6-8; and a second step of, after the first step, heating the precursor to 425-650°C to produce an active material.

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