| 摘要 |
To obtain a positive electrode active material which has excellent cycle characteristics, while being suppressed in decrease in the discharge voltage. A method for producing a positive electrode active material, which comprises: a step wherein at least one sulfate (A) selected from the group consisting of sulfates of Ni, sulfates of Co and sulfates of Mn and at least one carbonate (B) selected from the group consisting of carbonates of Na and carbonates of K are mixed with each other in the form of an aqueous solution, so that a carbonate compound is precipitated; a step wherein the carbonate compound and an aqueous solution (C) that contains at least one element (Y) selected from the group consisting of Al, F, Si, Zr, Y, Mo, Ce and Ca are mixed with each other; a step wherein the water content is vaporized from the mixture of the carbonate compound and the aqueous solution (C), so that a precursor compound is obtained; and a step wherein the precursor compound and a lithium compound are mixed with each other and fired at 500-1,000°C. |
