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将氧化石墨烯GO(Graphene oxide)进行热还原得到RGO(Reduced graphene oxide),通过液相法原位合成出RGO/M n O2电极复合材料。采用扫描电镜(SEM)、X射线衍射(XRD)、傅里叶红外(FT-IR)、四探针法和循环伏安测试表征分析复合材料的表面形貌、微观结构、电导率和比电容。结果表明,相较于纯Mn O2和GO/Mn O2电极材料,RGO/Mn O2复合材料比电容得到提高。热还原温度为600℃时比电容最高,为321 F·g-1。这可能是GO的加入显著降低了Mn O2的团聚程度,增大了Mn O2参与赝电容反应的活性面积。热还原得到的RGO有效提高了复合材料的电导率,其残留的含氧官能团提供了一定的赝电容。
The graphene oxide (RGO) was obtained by thermal reduction of graphene oxide (GO), and the RGO / M n O2 electrode composite was synthesized in situ by liquid-phase method. The surface morphology, microstructure, electrical conductivity and specific capacitance of the composites were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), four-probe method and cyclic voltammetry . The results show that the specific capacitance of RGO / MnO2 composite is improved compared with pure Mn O2 and GO / Mn O2 electrode materials. Thermal reduction temperature of 600 ℃, the highest specific capacitance of 321 F · g-1. It is probable that the addition of GO significantly reduced the degree of Mn O2 agglomeration and increased the active area of Mn O2 involved in pseudocapacitive reaction. RGO obtained by thermal reduction effectively increases the electrical conductivity of the composites, and the residual oxygen-containing functional groups provide some pseudocapacitance.