Graphene nanoplate-MnO2 composites for supercapacitors: a controllable oxidation approach
Graphene nanoplate-MnO2 composites for supercapacitors: a controllable oxidation approach
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用于超级电容器的石墨烯纳米板-MnO2复合材料：一种可控氧化方法
DOI：
10.1039/c1nr10229j
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发表时间：
2011-01-01
期刊：
影响因子：
6.7
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Huang, Huajie;Wang, Xin
通过氧化石墨烯纳米片骨架中的部分碳原子，在室温下制备了石墨烯纳米片-二氧化锰复合材料。采用X射线衍射（XRD）、拉曼光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和循环伏安（CV）等测试手段对复合材料进行了表征。结果表明，反应时间对复合材料中石墨烯骨架中碳原子的氧化程度有一定的影响，同时也影响复合材料的微观结构、形貌和电化学性能。与MnO 2纳米片相比，反应时间为3 h时制备的纳米复合材料具有更好的电化学性能。
Graphene nanoplate-MnO2 composites have been synthesized by oxidising part of the carbon atoms in the framework of graphene nanoplates at ambient temperature. The composites were characterized by means of X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV). It was found that the oxidation extent of the carbon atoms in the graphene framework in these composites was dependent on the reaction time, which also influenced their microstructure, morphology and electrochemical properties. Compared with MnO2 nanolamellas, the nanocomposite prepared with a reaction time of 3 h reveals better electrochemical properties as a supercapacitor electrode material.