Enhancing the electrochemical performance of the LiMn2O4 hollow microsphere cathode with a LiNi0.5Mn1.5O4 coated layer

Spinel cathode materials consisting of LiMn2O4@LiNi0.5Mn1.5O4 hollow microspheres have been synthesized by a facile solution-phase coating and subsequent solid-phase lithiation route in an atmosphere of air. When used as the cathode of lithium-ion batteries, the double-shell LiMn2O4@LiNi0.5Mn1.5O4 hollow microspheres thus obtained show a high specific capacity of 120mAhg(-1) at 1C rate, and excellent rate capability (90mAhg(-1) at 10C) over the range of 3.5-5V versus Li/Li+ with a retention of 95% over 500cycles.