| abstract |
The purpose of the present invention is to provide a positive electrode active material for sodium ion secondary batteries, which has excellent charge/discharge capacity and is able to be reduced in the production cost, while being produced by an easy method.nA positive electrode active material for sodium ion secondary batteries, which is characterized by containing an oxyhydroxide that contains S, Na, and Ni or Ni and at least one transition metal element selected from the group consisting of Mg, Mn, Zn, Co and Al. |