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POSITIVE ELECTRODE ACTIVE MATERIAL FOR ORGANIC ELECTROLYTE SECONDARY BATTERY, MANUFACTURING METHOD OF THE POSITIVE ELECTRODE ACTIVE MATERIAL, AND ORGANIC ELECTROLYTE SECONDARY BATTERY USING THE POSITIVE ELECTRODE ACTIVE MATERIAL
POSITIVE ELECTRODE ACTIVE MATERIAL FOR ORGANIC ELECTROLYTE SECONDARY BATTERY, MANUFACTURING METHOD OF THE POSITIVE ELECTRODE ACTIVE MATERIAL, AND ORGANIC ELECTROLYTE SECONDARY BATTERY USING THE POSITIVE ELECTRODE ACTIVE MATERIAL
PROBLEM TO BE SOLVED: To provide a positive electrode active material which makes obtainable an organic electrolyte secondary battery excellent in the charge-discharge cycle characteristics at a high temperature, a method for manufacturing the active material, and an organic electrolyte secondary battery incorporating the active material, yielded by the method, and excellent in the charge-discharge cycle characteristics at high temperature. SOLUTION: Compound(s) selected among aluminum compound, cobalt compound, and nickel compound is mixed with dimanganese trioxide obtained by subjecting manganese oxide to a heat treatment at 550-750 deg.C, zinc compound, and lithium compound, and the product is pressurized by the air so that the oxygen partial pressure becomes 0.04-1 MPa and is subjected to a heating process for 1-40 hr at a heating temperature 600-900 deg.C, followed by gradual cooling to 500 deg.C at a temperature falling speed of 10 deg.C/min or below, and thereby the intended positive electrode active material is manufactured which has a composition expressed by (Li1-wZnw)8a [Mn2-x-yMlyLix]16dO4, where Ml is Al, Co or Ni and the conditions should be met as 0w=0.1, 0=x=0.1, and 0y=0.1, and using this positive electrode active material the intended organic electrolyte secondary battery is established.
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