MoSe2@N, P-C composites for sodium ion battery
Tao Peng , Yu-hong Luo , Lin-bo Tang , Zhen-jiang He , Cheng Yan , Jing Mao , Ke-hua Dai , Xian-wen Wu , Jun-chao Zheng
Journal of Central South University ›› 2022, Vol. 29 ›› Issue (9) : 2991 -3002.
MoSe2@N, P-C composites for sodium ion battery
The conversion reaction-based anode materials of sodium ion batteries have relatively high capacity; however, the application of these materials is limited by their structural collapse due to the poor structure stability. In this work, MoSe2 nanosheets were synthesized by a solvothermal method. An organic solvent was intercalated into the MoSe2 materials to enlarge the interlayer spacing and improve the conductivity of the material. The MoSe2 material was coated with an organic pyrolysis carbon and then a uniform carbon layer was formed. The surface carbon hybridization of the nanosheet materials was realized by the introduction of heteroatoms during the sintering process. The as-prepared MoSe2@N, P-C composites showed a superior rate performance as it could maintain the integrity of the morphology and structure under a high current density. The composites had a discharge specific capacity of 302.4 mA·h/g after 100 cycles at 0.5 A/g, and the capacity retention rate was 84.96%.
sodium ion battery / MoSe2 / anode materials / atomic doping / electrochemical performance
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