Citation: Shi Lintao, Cui Hongfu, Xu Chaoxiang, Yu Chunpeng. Effect of Li₄Mn₅O₁₂ Coating on Structure and Performance of the Ternary Cathode Materials[J]. Chemistry, ;2020, 83(1): 42-49. shu

Effect of Li₄Mn₅O₁₂ Coating on Structure and Performance of the Ternary Cathode Materials

School of Materials Science and Engineering, Shanghai University, Shanghai, 200444

Received Date: 7 August 2019
Accepted Date: 10 October 2019

Figures(8)

LiNi_1/3Mn_1/3Co_1/3O₂ has high theoretical specific capacity, but the surface structure of the cathode material greatly decays at high charging voltage, which leads to the deterioration of cycle performance and rate performance for batteries. In this paper it was reported that LiNi_1/3Mn_1/3Co_1/3O₂ coated with lithium-rich spinel Li₄Mn₅O₁₂ can effectively improve the electrochemical performance. XRD, SEM, XPS and TEM were used to analyze the cathode material. It was confirmed that Li₄Mn₅O₁₂uniformly formed a coating layer of 10 nm thick on the surface of LiNi_1/3Mn_1/3Co_1/3O₂. LiNi_1/3Mn_1/3Co_1/3O₂@Li₄Mn₅O₁₂ has a high discharge capacity of 179.5 mAh/g, and the capacity retention rate is 88.6% after 100 cycles, which is significantly higher than that of LiNi_1/3Mn_1/3Co_1/3O₂(78.3%). Therefore, the coating of LiNi_1/3Mn_1/3Co_1/3O₂ with lithium-rich spinel Li₄Mn₅O₁₂ provides a new way to achieve a high energy density of lithium-ion batteries.
- Cathode materials,
- Li₄Mn₅O₁₂,
- Coating,
- Lithium-ion battery
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Effect of Li₄Mn₅O₁₂ Coating on Structure and Performance of the Ternary Cathode Materials