| abstract |
PROBLEM TO BE SOLVED: To provide a positive electrode active material capable of further improving chemical stability, a method for producing the same, and a battery. A coating layer containing at least one of Ni and Mn is formed on a Co-containing compound containing Co and not containing Li (step S110), and then mixed with a Li compound and heat-treated (step S120). Thereby, the particle | grain surface can be uniformly covered with the stable complex oxide containing at least one of Ni and Mn. Moreover, it can synthesize | combine by one heat processing. [Selection] Figure 1 |