Investigations on the rate performance of LiFePO 4 /CeO 2 composite materials via polyol technique for rechargeable lithium batteries

An attempt has been made to synthesize CeO 2 modified LiFePO 4 composite cathode materials via a polyol technique with a chemical combination route. The surface modified LiFePO 4 samples exhibit superior electrochemical performances compared to bare samples. CeO 2 may help to induce the fast lithium-ion diffusivity of LiFePO 4 cathode materials to promote high-rate stable cycling and a good coulombic efficiency. The complete coverage of a mild coating of CeO 2 under an optimized concentration on LiFePO 4 may limit the direct contact of the active material with the electrolyte, which improves the interface stability by preventing the dissolution of Fe ions in the electrolyte.