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because the transition metal (Ni, Co, and Mn) ions dissolve from the cathode active materials and the side reactions occur with the electrolyte, resulting in poor cycling performance. [9][10][11][12] Furthermore, the LiNi 0.8 Co 0.10 Mn 0.1 O 2 (NCM811) material shows secondary crystal cracking and volume expansion under a fully charged state, which is enough to cause an expanding crack near the grain boundary inside the particle, so it causes poor cyclic stability. [13] The research shows that the volume expansion and contraction of NCM811 can reach 3.9% during the delithiation/lithiation process, which is enough to cause an expanding crack near the grain boundary inside the particle. [13,14] Continuous new cracks in the material particles expose fresh surfaces and continue to react with the electrolyte, resulting in pulverization of the electrode materials and battery failure. At present, coating methods to solve these problems include single-layer coatings, such as SiO 2 , [15