LiMn2 − xCoxO4 cathode with enhanced cycleability

Lithium—manganese—cobalt oxides, LiMn2 − xCoxO2 with 0 < x < 0.2 were synthesized by a solid-state multi-steep reaction, in air, from a mixed manganese—cobalt oxide with lithium hydroxide. The samples were characterized by X-ray diffraction and electrochemical tests. The crystal structure of the obtained compounds is spinel-related. The discharge capacity of an Li/LiMn2 − xCoxO2 cell with x = 0.1 was 114 mAh/g for the fifth discharge and stayed almost the same at the cycle no. 100–107 mAh/g — related to the cathode capacity. The demonstrated cycling stability for 100 cycles reaches 99.93%. The improvement in cycleability can be attributed to the stabilizing role of Co3+ ions, substituting Mn3+ in the initial structure.