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

Lithium-rich manganese-based oxides (Li1.2Mn0.54Ni0.13Co0.13O2, 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 tha...

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Bibliographic Details
Published in:Key engineering materials 2023-01, Vol.939, p.135-142
Main Authors: Li, Yue Mei, Sun, Li Xian, Luo, Yu Mei, Long, Yu Xing, Zhang, Liang Bin, Lu, Mei Yan, Wei, Dan, Chu, Hai Liang, Qiu, Shu Jun, Xu, Fen, Bu, Sheng Zhou, Xia, Yong Peng
Format: Article
Language:English
Subjects:
Basic oxides
Cathodes
Coating
Discharge
Electrochemical analysis
Electrode materials
Lithium-ion batteries
Manganese oxyhydroxides
Performance tests
Sol-gel processes
Structural analysis
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Summary:Lithium-rich manganese-based oxides (Li1.2Mn0.54Ni0.13Co0.13O2, 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.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/p-187050