Sonochemical synthesis and electrochemical performance of reduced graphene oxide/cerium dioxide nanocomposites

Rui-Juan Bai, Yunpeng Zhao, Cuiying Lu, Yu Meng, Wen-wen Gao, Yan Wang, Rui Dang, Miao Mu, Jinxi Wang, Y. Jiao
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引用次数: 1

Abstract

Reduced graphene oxide/cerium dioxide (is synthesized by a simple sonochemical route. The morphology and chemical structure of the nanocomposites are characterized by scanning electron microscopy, energy disperse spectroscopy, insitu infrared spectroscopy, and X-ray diffraction. The electrochemical properties of a fabricat reduced graphene oxide/cerium dioxide2 nanocomposite electrode examined by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The results indicate that the reduced graphene oxide can prevent the aggregation of cerium dioxide nanoparticles; meanwhile, the reduced graphene oxide/cerium dioxide-3 nanocomposite electrode exhibits excellent electrochemical performance with a high specific capacitance of 185 F·g−1 at 0.5 A·g−1, a high rate capability, and good reversibility, which results from the synergism and coupling between reduced graphene oxide nanosheets and cerium dioxide nanoparticles.
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还原氧化石墨烯/二氧化铈纳米复合材料的声化学合成及电化学性能
还原氧化石墨烯/二氧化铈(通过一个简单的声化学路线合成。利用扫描电子显微镜、能量分散光谱、原位红外光谱和x射线衍射对纳米复合材料的形貌和化学结构进行了表征。采用循环伏安法、恒流充放电法和电化学阻抗法研究了制备还原氧化石墨烯/二氧化铈纳米复合电极的电化学性能。结果表明:还原后的氧化石墨烯能够阻止二氧化铈纳米粒子的聚集;同时,还原后的氧化石墨烯/二氧化铈-3纳米复合电极表现出优异的电化学性能,在0.5 a·g−1时具有185 F·g−1的高比电容、高倍率性能和良好的可逆性,这是还原后的氧化石墨烯纳米片与二氧化铈纳米颗粒之间的协同耦合作用的结果。
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来源期刊
Journal of Chemical Research-s
Journal of Chemical Research-s 化学科学, 有机化学, 有机合成
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期刊介绍: The Journal of Chemical Research is a peer reviewed journal that publishes full-length review and research papers in all branches of experimental chemistry. The journal fills a niche by also publishing short papers, a format which favours particular types of work, e.g. the scope of new reagents or methodology, and the elucidation of the structure of novel compounds. Though welcome, short papers should not result in fragmentation of publication, they should describe a completed piece of work. The Journal is not intended as a vehicle for preliminary publications. The work must meet all the normal criteria for acceptance as regards scientific standards. Papers that contain extensive biological results or material relating to other areas of science may be diverted to more appropriate specialist journals. Areas of coverage include: Organic Chemistry; Inorganic Chemistry; Materials Chemistry; Crystallography; Computational Chemistry.
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