| abstract |
[PROBLEMS] To stably charge and discharge in an operating voltage range (about 4 V) equivalent to that of an existing lithium cobalt oxide-based positive electrode material by using an inexpensive raw material with few resource restrictions. The main purpose is to provide new materials. SOLUTION: Composition formula Li 1 + x (Mn 1-mn Fe n Co m ) 1-x O 2 (where 0 <x <1/3, 0.01 ≦ m ≦ 0.50, 0.05 ≦ n ≦ 0.75, 0.06 ≦ A lithium ferrite complex oxide represented by m + n <1) and having a layered rock salt structure. [Selection] Figure 4 |