Remarkable electrochemical performance of 0.5Li2MnO3·0.5LiNi0.5Mn0.3Co0.2O2 synthesized by means of a citric acid–aided route

Lithium-manganese-rich–lithiated nickel-manganese-cobalt oxides are advantageous for using in lithium-ion batteries due to low toxicity and high specific capacity but suffer from low high-rate capability. In this paper, characterization and electrochemical testing of 0.5Li 2 MnO 3 ·0.5LiNi 0.5 Mn 0.3 Co 0.2 O 2 (Li 1.2 Ni 0.2 Mn 0.52 Co 0.08 O 2 ) obtained by means of a citric acid–aided route is described. It demonstrates excellent electrochemical performance possessing specific capacity equal to the theoretical value (280 mAh g −1 ), being able to be discharged with currents of 2240 mA g −1 (8 C), having high coulombic efficiency (~ 99%) even after high-rate tests, and manifesting low capacity fade after high current loads and upon further cycling by 0.1 C currents (0.144 mAh g −1 per cycle).