基于天然辉钼矿制备的少层MoS2纳米片及其超电容性能研究

Preparation of Few-layer MoS2 Nanosheets Based on Natural Molybdenite and Its Supercapacitor Properties

  • 摘要: 以天然辉钼矿为原料,采用Na+离子辅助液相剥离法制备了一种少层的MoS2纳米片(F-MoS2)。分析结果表明,剥离得到的F-MoS2纳米片厚度约为1.1~1.5 nm,对应为2~3层MoS2。电化学性能测试发现,F-MoS2在0.25 A/g的电流密度下质量比容量可达到73.7 F/g,远高于未剥离的辉钼矿(9.2 F/g)和商品MoS2(19.6 F/g),F-MoS2显著提升的电容量主要归因于其充分暴露的活性表面。本研究证实了通过Na+离子辅助液相剥离法制备的F-MoS2是一类非常有应用前景的储能材料。

     

    Abstract: A few-layer of MoS2 nanosheets (F-MoS2) was prepared from natural molybdenite by Na+ ion-assisted liquid phase peeling method. The results showed that the thickness of F-MoS2 nanosheets obtained by peeling was about 1.1-1.5 nm, the number of layers corresponding to MoS2 was 2-3 layers. It was confirmed by electrochemical performance tests that the specific capacitance of F-MoS2 was 73.7 F/g at a current density of 0.25 A/g, which was much higher than that of unstripped molybdenite (9.2 F/g) and commercial MoS2 (19.6 F/g), the significantly increased capacitance of F-MoS2 was mainly attributed to its fully exposed active surface. This research confirms that F-MoS2 obtained through Na+ ion-assisted liquid phase peeling method was a very promising class of energy storage materials.

     

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