SODIUM LAYERED OXIDE AS CATHODE MATERIAL FOR SODIUM ION BATTERY

摘要

The present invention relates to a mixed oxide of sodium and transition metals having the formula (1) : Nax[MnaNibCOc]02+y, wherein: 0.5≤ x ≤0.9, -0.1≤ y ≤0.1, a + b + c = 1, 4a + 2b + 3c = 4 - x + 2y, 0 < c ≤ 0.5 The present invention further relates to a process for producing such a mixed oxide, a positive electrode comprising such a mixed oxide and a sodium ion secondary battery comprising such a positive electrode.