超级电容器
电容
钒
材料科学
硫化镍
镍
制作
电极
化学工程
功率密度
硫化物
冶金
化学
功率(物理)
医学
替代医学
物理化学
病理
工程类
物理
量子力学
作者
Ziang Gao,Huihui Wang,Xia Chen
标识
DOI:10.1016/j.est.2023.107117
摘要
Herein, nickel-vanadium binary sulfide (NVS) was directly grown on the basis of nickel-vanadium layered double hydroxides (NiV-LDH) using the combination of hydrothermal method and gas-phase vulcanization method, forming a unique structure (NVS@NiV-LDH). The results suggest that the growth of NVS significantly increases the number of active sites and enhances the stability of the structure. The NVS@NiV-LDH electrode reaches a standout specific capacitance of 465.33 F g−1 at a high current density of 6 A g−1 and an excellent cycle stability of 90.69 % after 5000 charge-discharge cycles at 12 A g−1. Furthermore, an asymmetric supercapacitor (NVS@NiV-LDH//AC) was also assembled, achieving a high energy density of 133.98 Wh kg−1 at a high power density of 15,120 W kg−1 with a superior cycling stability (82.8 % of its initial specific capacitance after 5000 cycles at 12 A g−1). These results demonstrate an optimistic prospect of the NVS@NiV-LDH in electrode materials for supercapacitor applications.
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