不同比例CeO2包覆LNMO材料的电化学性能研究OA北大核心CSTPCD

LiNi0.5Mn1.5O4(LNMO)cathode material was prepared by pH controlled co precipitation method,and SEM physical characterization showed that the material exhibited agglomerated spheri-cal particle morphology.Different proportions of CeO2 were used to coat and optimize the electro-chemical performance of LNMO cathode materials.The structure and morphology of CeO2-LNMO materials were characterized through physical tests.The electrochemical performance of CeO2-LNMO materials was analyzed through cycling,rate,voltammetry,and impedance tests.The CeO2-LNMO material with a CeO2 coating amount of 2%showed the best electrochemical performance.The first discharge specific capacities at high rate 5 C and 10 C were 108.8 and 97.6 mAh/g,and the capacity retention rate was 92.5%after 100 cycles at 1 C.CeO2 coating can enhance the conductivity of LNMO materials,improve the interfacial stability of materials,and optimize the electrochemical performance of LNMO cathode materials.