超级电容器
钒
电极
材料科学
二硫键
二硫化钼
化学工程
纳米技术
电化学
无机化学
化学
冶金
工程类
生物化学
物理化学
作者
Anila Bhuvanendran Nandana,R.B. Rakhi
标识
DOI:10.1002/ente.202402153
摘要
Transition metal dichalcogenides (TMDs) emerge as promising electrode materials for next‐generation electrochemical energy‐storage devices. In the present study, vanadium disulfide (VS 2 ), an underexplored TMD, is investigated as an electrode material for supercapacitors. VS 2 nanosheets are synthesized via a single‐step hydrothermal method at 220 °C for 24 h. Multiple characterization techniques, including Fourier‐transform infrared, Raman spectroscopy, scanning electron microscope–energy dispersive X‐ray analysis, and transmission electron microscope, confirm the formation of phase‐pure VS 2 nanosheets with a hexagonal structure. The specific surface area, measured using Brunauer–Emmett–Teller analysis, is 12 m 2 g −1 . A specific capacitance of 106 F g −1 at a current density of 1 A g −1 is demonstrated using symmetric supercapacitors fabricated using these VS 2 nanosheets. Using this device, an energy density of 34 Wh kg −1 at a power density of 800 W kg −1 is achieved. Moreover, the supercapacitor maintains 94% capacitance retention after 9000 charge–discharge cycles at 5 A g −1 , highlighting the potential of VS 2 nanosheets as efficient electrode materials for supercapacitor applications.
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