Study on the effect of ceria-coated LiNi0.8Co0.1Mn0.1O2 on its electrochemical performance

LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) cathode material has attracted much attention as a candidate material for lithium-ion batteries due to its high specific capacity. Unfortunately, due to problems such as unfavorable interfacial side reactions between electrode materials and electrolytes, the battery capacity rapidly decays during cycling, which is not conducive to the use in the field of new energy. In this paper, CeO₂ was successfully coated on the surface of NCM811. When the coating amount is 1 wt%, the NCM811 electrode material exhibits excellent electrochemical performance. After 70 cycles, the reversible capacity at 1 C is 149.2 mA h/g, much higher than pristine NCM811. The good electrochemical performance of modified NCM811 may be due to CeO₂ as a barrier between the cathode material and the electrolyte, which can effectively inhibit the side reaction between NCM811 and the electrolyte, thereby improving its electrochemical performance.