Synthesis and Electrochemical Properties of Nickel-Coated LiMnFePO ₄ Cathode Materials

Taking lithium manganese iron phosphate (LMFP) as the research object, surface modification was used to carry out the modification research on it, and the effects of the Ni coating method, different precipitating agents and different coating amounts on the electrochemical performance of LMF cathode materials were investigated. The effects of different precipitants (nickel oxalate and nickel hydroxide) and nickel coating amounts on the electrochemical performance of LMFP materials were investigated, and the optimal coating conditions were determined. The optimum cladding conditions are: nickel sulfate and sodium hydroxide as precipitant cladding 1% nickel. The discharge capacity at 0.2C magnification was 150.9[Formula: see text]mAh[Formula: see text]g[Formula: see text], and the retention of discharge specific capacity after 100 cycles was 95% (0.5C), 92.6% (1C) and 86.9% (2C), respectively.