Investigations on the rate performance of LiFePO4/CeO2 composite materials via polyol technique for rechargeable lithium batteries

Abstract

An attempt has been made to synthesize CeO₂ modified LiFePO₄ composite cathode materials via a polyol technique with a chemical combination route. The surface modified LiFePO₄ samples exhibit superior electrochemical performances compared to bare samples. CeO₂ may help to induce the fast lithium-ion diffusivity of LiFePO₄ cathode materials to promote high-rate stable cycling and a good coulombic efficiency. The complete coverage of a mild coating of CeO₂ under an optimized concentration on LiFePO₄ 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.