Positive electrode material for nonaqueous electrolyte secondary battery and method for producing same

The present invention is a method for producing a positive electrode material for a non-aqueous electrolyte secondary battery, the method comprising: producing a positive electrode material for a non-aqueous electrolyte secondary battery, the positive electrode material containing lithium ions and an oxidized polyaniline having an-NLi-group in which a proton of a nitrogen atom of the-NH-group is exchanged with a lithium ion; the present invention relates to a method for producing an acidic oxidized polyaniline as a raw material by electrolytic polymerization of aniline in an acidic solution, said method comprising: a step in which the acidic oxidized polyaniline is doped in the presence of sulfur and/or LiFePO4; a step in which the starting material is washed with an alkaline solution, thereby making the starting material into an alkaline type; and performing a reaction for obtaining a semi-reduced polyaniline by partially or completely reducing the alkali-type starting material in a lithium salt containing l