Graphene, as a new type of carbon material in the forefront of research, has been applied widely in the area of supercapacitors with the advantages of a large positive specific surface, high conductivity, stable chemical properties and good supercapacitor performance. In this study, an investigation on the electrochemical performance of reduced graphene oxides (rGOs) prepared from various natural graphites was conducted. X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, atomic force microscopy and electrochemical performance analysis were performed to characterize the as-prepared GOs and rGOs. The results demonstrated that a reduction modification of GO was necessary to optimize its electrochemical performance. The rGO has a great electrochemical performance with a good repair ability, better oxygen-containing functional group removal effect, lower structural defects, larger average size of the in-plane sp² region and great specific capacitance.

中文翻译：

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不同类型天然石墨制备还原氧化石墨烯的电化学性能

石墨烯作为研究前沿的新型碳材料，具有正比表面积大、导电率高、化学性质稳定、超级电容器性能良好等优点，在超级电容器领域得到了广泛应用。在这项研究中，对由各种天然石墨制备的还原氧化石墨烯（rGO）的电化学性能进行了研究。通过 X 射线衍射、X 射线光电子能谱、傅里叶变换红外光谱、拉曼光谱、原子力显微镜和电化学性能分析来表征所制备的 GO 和 rGO。结果表明，GO 的还原修饰对于优化其电化学性能是必要的。rGO具有良好的电化学性能，具有良好的修复能力、较好的含氧官能团去除效果、较低的结构缺陷、较大的面内sp 2 区平均尺寸和较大的比^电容。