2 -coated cathode is 182.5 mAh·g −1 at a current density of 20 mA·g −1 , in contrast to 165.8 mAh·g −1 of the bared sample. The discharge capacity retention of 1.0 wt% CeO 2 -coated sample after 12 cycles reaches 93.2%, in comparison with 86.6% of the bared sample. CV results show that the CeO 2 coating could suppress phase transitions and prevent the surface of cathode material from direct contact with the electrolyte, thus enhance the electrochemical performance of the coated material.