LaF3 coated LiMn2O4 was prepared by a modified co-precipitation method.
LaF3 coating improves the Li+ diffusion coefficients of LiMn2O4.
LaF3 coating suppresses the dissolution of LiMn2O4 in LiNO3 aqueous electrolytes.
LaF3 coated LiMn2O4 exhibits superior electrochemical performance to LiMn2O4.