POSITIVE ELECTRODE ACTIVE MATERIAL AND ITS PREPARATION METHOD, SODIUM ION BATTERY AND APPARATUS CONTAINING THE SODIUM ION BATTERY

摘要

The present application discloses a positive electrode active material and its preparation method, a sodium ion battery and an apparatus containing the sodium ion battery. The positive electrode active material satisfies a chemical formula of Na1-xCuhFekMnlMmO2-y wherein M is one or more selected from Li, Be, B, Mg, Al, K, Ca, Ti, Co, Ni, Zn, Ga, Sr, Y, Nb, Mo, In, Sn, and Ba, 0