Surface Coating Modification of Lithium-Rich Manganese-Based Oxide as Cathode Material for Lithium-Ion Batteries

Abstract:

Lithium-rich manganese-based oxides (Li_1.2Mn_0.54Ni_0.13Co_0.13O₂, LMNCO) as cathode materials were prepared by the sol-gel method. Then, LMNCO was coated with γ-basic manganese oxide (γ-MnOOH) to form the composite cathodes. Through the structural characterization and performance test, it is found that the composite cathode with 10% γ-MnOOH coating exhibits the best electrochemical performance. After 50 cycles at 0.1 C (1 C = 200 mA g^-1), the specific discharge capacity is 264.4 mAh g^-1 with capacity retention of 96.1%. Even at a high current density of 1C, its discharge capacity reaches up to 200.5 mAh g^-1 after 30 cycles, which suggests that surface coating of γ-MnOOH is an effective strategy for further enhancing the electrochemical performance of LMNCO.

• Periodical: Key Engineering Materials (Volume 939)
• Pages: 135-142
• DOI: https://doi.org/10.4028/p-187050
• Online since: January 2023
• Authors: Sheng Zhou Bu, Yu Xing Long, Liang Bin Zhang, Mei Yan Lu, Yue Mei Li, Dan Wei, Yong Peng Xia, Yu Mei Luo, Shu Jun Qiu, Fen Xu, Li Xian Sun, Hai Liang Chu*
• Keywords: Li_1.2Mn_0.54Ni_0.13Co_0.13O₂, Lithium-Ion Battery, Lithium-Rich Manganese-Based Cathode, Surface Coating, γ-MnOOH

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