Abstract Reduced graphene oxide – cerium oxide (rGO-CeO2) nanocomposite is prepared by simple hydrothermal method for enhanced charge storage supercapacitor performance. The prepared nanocomposite is characterized by various techniques, such as X-ray diffraction (XRD), Fourier Transform – Raman Spectra (FT-Raman), Field Emission - Scanning Electron Microscope (FE-SEM), High Resolution –Transmission Electron Microscope (HR-TEM), Thermo-gravimetric and Differential Thermal Analysis (TG-DTA), Cyclic Voltametric (CV), Galvanostatic Charge/Discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS) studies to understand its morphology, composition, thermal stability and charge storage efficiency as electrode material. The nanocomposite formation is confirmed with FE-SEM and HR-TEM images where the ceria is anchored on the surface of the graphene sheets and the interplanar distances are observed as fringes. The Energy Dispersive Analysis of X-Ray (EDAX) has provided substantial evidence for the nanocomposite formation with the elemental composition. The maximum specific capacitance is measured as 280 F/g using GCD studies. The surface area of the nanocomposite is determined using the Brunauer-Emmett-Teller (BET) analysis.

中文翻译：

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水热法合成石墨烯基氧化铈纳米复合材料增强超级电容器性能

摘要 通过简单的水热法制备还原氧化石墨烯-氧化铈 (rGO-CeO2) 纳米复合材料，以增强电荷存储超级电容器的性能。制备的纳米复合材料通过各种技术进行表征，例如 X 射线衍射 (XRD)、傅里叶变换-拉曼光谱 (FT-Raman)、场发射-扫描电子显微镜 (FE-SEM)、高分辨率-透射电子显微镜 (HR) -TEM)、热重和差热分析 (TG-DTA)、循环伏安 (CV)、恒电流充电/放电 (GCD) 和电化学阻抗谱 (EIS) 研究，以了解其形态、组成、热稳定性和电荷存储作为电极材料的效率。纳米复合材料的形成通过 FE-SEM 和 HR-TEM 图像证实，其中氧化铈锚定在石墨烯片的表面上，并观察到晶间距离作为条纹。X 射线能量色散分析 (EDAX) 为纳米复合材料的形成与元素组成提供了大量证据。使用 GCD 研究测得的最大比电容为 280 F/g。使用Brunauer-Emmett-Teller (BET)分析确定纳米复合材料的表面积。