超级电容器
材料科学
石墨烯
纳米复合材料
电极
扫描电子显微镜
电容
电化学
氧化物
化学工程
纳米颗粒
纳米技术
复合材料
冶金
化学
物理化学
工程类
作者
Rahúl Singhal,D. J. Thorne,Peter K. LeMaire,Xavier Martinez,Chen Zhao,Ram K. Gupta,David Uhl,Ellen Scanley,C. Broadbridge,Rakesh K. Sharma
出处
期刊:AIP Advances
[American Institute of Physics]
日期:2020-03-01
卷期号:10 (3)
被引量:25
摘要
Supercapacitors or electrochemical capacitors are receiving greater interest because of their high-power density, long life, and low maintenance. We have synthesized CuS nanoparticles and graphene oxide (CuS–GO) nanocomposites for supercapacitor applications because of their low cost and excellent electrochemical properties. The phase purity of each material was determined using powder XRD studies. The bandgap was determined by UV-visible spectrophotometric studies. Scanning electron microscope and transmission electron microscope images revealed the nano-scale morphology of the synthesized particles. All the electrochemical measurements were conducted in a standard three-electrode configuration, using a platinum wire as the counter electrode and Hg/HgO as the reference electrode. CuS and its composites with graphene oxide on nickel foam were used as working electrodes. All the electrochemical measurements were performed in 3M KOH solution. The CuS–GO nanocomposite electrode showed a specific capacitance of 250 F/g, 225 F/g, 182 F/g, 166 F/g, 161 F/g, and 158 F/g at a current density of 0.5 A/g, 1 A/g, 5 A/g, 10 A/g, 15 A/g, and 20 A/g, respectively. CuS–GO electrodes showed a specific capacitance retention of 70% after 5000 charge–discharge cycles at a current density of 5 A/g.
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