石墨烯
超级电容器
材料科学
循环伏安法
介电谱
氧化物
纳米孔
电容
电化学
咪唑酯
碳纤维
电极
化学工程
复合数
复合材料
纳米技术
化学
冶金
物理化学
工程类
作者
Abiola Ganiyat Olatoye,Jie Zhang,Qianyu Wang,Enhong Cao,Wenli Li,Emmanuel Oluwaseyi Fagbohun,Yanbin Cui
标识
DOI:10.1016/j.crcon.2022.06.002
摘要
In the present work, nanoporous carbon (NPC) was prepared from a metal–organic framework (zeolite imidazolate framework 8, ZIF-8). Different concentrations of graphene oxide (GO) were used to make NPC/reduced graphene oxide (NPC/rGO-x, x = 0.5, 1.0, 1.5, and 2.0) composites, and then γ-MnS/NPC/rGO-1 composite was synthesized via a simple hydrothermal technique. The electrochemical characteristics of porous carbon composites (NPC/rGO-x) and γ-MnS/NPC/rGO-1 electrodes were investigated by galvanostatic charge and discharge, cyclic voltammetry, and electrochemical impedance spectroscopy. NPC/rGO-1 showed the highest specific capacitance of 207 F/g at 0.5 A/g. Also, the γ-MnS/NPC/rGO-1 electrode demonstrates exceptional electrochemical performance with a high specific capacitance of 300 F/g at 0.5 A/g and impressive cyclic stability of 70% capacitance retention after 10,000 cycles at 1 A/g. As a result, this study demonstrates that γ-MnS/NPC/rGO-1 electrode can be considered a promising candidate for high-performance supercapacitors.
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