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Fabrication and electrochemical performance of graphene-ZnO nanocomposites

ISSN号：1674-1056
期刊名称：《中国物理B：英文版》
时间：0
分类：O646.54[理学—物理化学;理学—化学] TB332[一般工业技术—材料科学与工程]
作者机构：[1]School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
相关基金：Project supported by the National Natural Science Foundation of China （Grant Nos. 61265004, 51272097, and 11204113）, the Nature and Science Fund from Yunnan Province Ministry of Education, China （Grant No. 2011C13211708）, and the Natural Training Project from University of Shanghai for Science and Technology, China （Grant No. 14XPM06）.

关键词：纳米复合材料, 电化学性能, 石墨电极, 氧化锌, 傅里叶变换红外光谱学, 电化学稳定性, 扫描电子显微镜, 透射电子显微镜, graphene-ZnO nanocomposites, electrochemical performance, electrochemical capacitors

中文摘要：

Graphene–ZnO nanocomposites were synthesized successfully through a one-step solvothermal approach. The morphology, structure, and composition of the prepared nanocomposites were investigated by scanning electron microscopy(SEM), transmission electron microscope(TEM), laser micro Raman spectroscopy, and Fourier transform infra-red spectroscopy(FT-IR). The outcomes confirmed that this approach is comparatively steady, practicable, and operable compared with other reported methods. The electrochemical performance of the graphene-ZnO electrodes was analyzed through cyclic voltammetry, altering-current(AC) impedance, and chronopotentiometry tests. The graphene–ZnO electrodes exhibited an improved electrode performance with higher specific capacitance(115 F·g-1), higher electrochemical stability, and higher energy density than the graphene electrodes and most reported graphene–ZnO electrodes. Graphene–ZnO nanocomposites have a steady reversible charge/discharge behavior, which makes them promising candidates for electrochemical capacitors(ECs).

英文摘要：

Graphene-ZnO nanocomposites were synthesized successfully through a one-step solvothermal approach. The mor-phology, structure, and composition of the prepared nanocomposites were investigated by scanning electron microscopy （SEM）, transmission electron microscope （TEM）, laser micro Raman spectroscopy, and Fourier transform infra-red spec-troscopy （FT-IR）. The outcomes confirmed that this approach is comparatively steady, practicable, and operable compared with other reported methods. The electrochemical performance of the graphene-ZnO electrodes was analyzed through cyclic voltammetry, altering-current （AC） impedance, and chronopotentiometry tests. The graphene-ZnO electrodes exhib-ited an improved electrode performance with higher specific capacitance （115 F·g^-1 ）, higher electrochemical stability, and higher energy density than the graphene electrodes and most reported graphene-ZnO electrodes. Graphene-ZnO nanocom-posites have a steady reversible charge/discharge behavior, which makes them promising candidates for electrochemical capacitors （ECs）.