Dong Guangsheng, Fang Yongzheng, Liao Shuqing, Zhu Kai, Yan Jun, Ye Ke, Wang Guiling, Cao Dianxue
Key Laboratory of Superlight Materials and Surface Technology (Ministry of Education), College Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, People's Republic of China.
Key Laboratory of Superlight Materials and Surface Technology (Ministry of Education), College Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, People's Republic of China.
J Colloid Interface Sci. 2021 Nov;601:594-603. doi: 10.1016/j.jcis.2021.05.150. Epub 2021 May 27.
MoS is regarded as an attractive anode material for lithium-ion batteries due to its layered structure and high theoretical specific capacity. Its unsatisfied conductivity and the considerable volume change during the charge and discharge process, however, limits its rate performance and cycling stability. Herein, 3D tremella-like nitrogen-doped carbon encapsulated few-layer MoS (MoS@NC) hybrid is obtained via a unique strategy with simultaneously poly-dopamine carbonization, and molybdenum oxide specifies sulfurization. The three-dimensional porous nitrogen-doped carbon served both as a mechanical supporting structure for stabilization of few-layers MoS and a good electron conductor. The MoS@NC exhibits enhanced high rate performance with a specific capacity of 208.7 mAh g at a current density of 10 A g and stable cycling performance with a capacity retention rate of 85.7% after 1000 cycles at 2 A g.
由于其层状结构和高理论比容量，二硫化钼被认为是一种有吸引力的锂离子电池负极材料。然而，其导电性不佳以及充放电过程中显著的体积变化限制了其倍率性能和循环稳定性。在此，通过一种独特的策略，即同时进行聚多巴胺碳化和氧化钼硫化，制备出了三维银耳状氮掺杂碳包覆少层二硫化钼（MoS@NC）复合材料。三维多孔氮掺杂碳既作为稳定少层二硫化钼的机械支撑结构，又作为良好的电子导体。MoS@NC在10 A g的电流密度下展现出增强的高倍率性能，比容量为208.7 mAh g，在2 A g下经过1000次循环后具有稳定的循环性能，容量保持率为85.7%。
