Effects of co-coating La₂O₃ and TiO₂ on tissue morphology and electrochemical properties of LiMn₂O₄ cathode materials

In this study, the impact of single-coating and co-coating of La₂O₃ and TiO₂ on the structural and electrochemical properties of LiMn₂O₄ cathode materials was investigated. Herein, La₂O₃ and TiO₂ were utilized as the coating materials. The results reveal that the electrochemical performance of LiMn₂O₄ cathode materials is improved to varying degrees after coating, among which the La₂O₃ and TiO₂ co-coated LiMn₂O₄ cathode materials demonstrated superior structural stability and electrochemical performance. Furthermore, the co-coated material achieved a capacity retention rate of 94.32% after 100 cycles at 1C. The initial discharge specific capacity was 108.74 mAh g⁻¹. In the multiplication test, a recovery rate of 96.78% was observed, and a high reversible discharge specific capacity of 95.02 mAh g⁻¹ was obtained at a high multiplication of 10 C. Moreover, the co-coated LiMn₂O₄ cathode material was characterized by high specific capacity and high reversible capacity. Thus, this study demonstrates that co-coating is beneficial for improving the electrochemical performance of LiMn₂O₄ cathode materials, providing an effective strategy for their coating modification.