Abstract CeO2/rGO nanocomposites have been successfully synthesized by a simple oil bath process. The morphology and structure of the CeO2/rGO composites was characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectra and Particle Size Analyzer. It is found that numerous of CeO2 nanocrystals are well dispersed over the surface of thin graphene nanosheets. The electrochemical properties of the CeO2/rGO composites were studied using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectra (EIS) measurements by a three-electrode system. The CeO2/rGO composites electrode exhibited high specific capacitance (282 F g− 1 at 2 A g− 1) and excellent electrochemical performance based on the cycling stability (retaining 243 F g− 1 after 1000 cycles). The binary composites possess higher electrochemical capacitance than each individual component as supercapacitor electrode materials. Such intriguing electrochemical performance is mainly attributed to the synergistic effects of CeO2 and graphene. The CeO2/rGO nanocomposites show excellent electrochemical properties for energy storage applications, which evidence their potential application as supercapacitors.

中文翻译：

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纳米晶CeO 2 修饰的rGO复合材料作为具有长时间循环稳定性的超级电容器电极材料的简单合成方法

摘要 CeO2/rGO 纳米复合材料已通过简单的油浴工艺成功合成。CeO2/rGO复合材料的形貌和结构通过场发射扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）、拉曼光谱和粒度分析仪进行表征。发现许多 CeO2 纳米晶体很好地分散在薄石墨烯纳米片的表面上。使用循环伏安法 (CV)、恒电流充放电 (GCD) 和三电极系统的电化学阻抗谱 (EIS) 测量来研究 CeO2/rGO 复合材料的电化学性能。CeO2/rGO复合材料电极表现出高比电容（2A g-1时为282 F g- 1）和基于循环稳定性的优异电化学性能（1000次循环后保留243 F g- 1）。与作为超级电容器电极材料的每个单独组件相比，二元复合材料具有更高的电化学电容。这种有趣的电化学性能主要归功于 CeO2 和石墨烯的协同作用。CeO2/rGO 纳米复合材料在储能应用中表现出优异的电化学性能，这证明了它们作为超级电容器的潜在应用。这种有趣的电化学性能主要归功于 CeO2 和石墨烯的协同作用。CeO2/rGO 纳米复合材料在储能应用中表现出优异的电化学性能，这证明了它们作为超级电容器的潜在应用。这种有趣的电化学性能主要归功于 CeO2 和石墨烯的协同作用。CeO2/rGO 纳米复合材料在储能应用中表现出优异的电化学性能，这证明了它们作为超级电容器的潜在应用。