| abstract |
To provide a positive electrode active material that, when used as a positive electrode active material for a lithium ion secondary battery, improves load resistance such as rate and output resistance, and improves powder properties, and the production cycle of the positive electrode active material is short and low in cost . A positive electrode active material produced by the following steps: a compound containing one or more elements selected from magnesium, calcium, zirconium, lanthanum and barium, a compound containing a halogen and an alkali metal, and a compound containing one or more elements selected from nickel, aluminum, manganese , fluorides of one or more metals of titanium, vanadium, iron and chromium are micronized and then mixed with powders of metal oxides to produce a first mixture; The second step of heating is performed at the following temperature. |