电化学还原法制备石墨烯膜电极

采用电化学还原法成功将氧化石墨烯还原,得到具有一定柔性的石墨烯膜。利用扫描电子显微镜法(SEM)、透射电子显微镜法(TEM)、拉曼光谱、X射线光电子光谱法(XPS)等测试手段对石墨烯材料的结构和形貌进行了表征;结果表明,所制备的石墨烯形貌较好、表面平整、无褶皱;通过测试其电化学性能对其还原电位、膜层厚度等制备条件进行了优化;当伏安循环电压范围为-2.0~2.0 V、膜厚度为1μm时,得到的石墨烯膜电化学性能优异,电流密度为0.1 A/g时,比电容可以达到123.8 F/g。

Easy electrochemical reduction preparation method for graphene membrane electrode

A graphene membrane with a certain flexibility was successfully prepared by an easy electrochemical reduction method using graphene oxide as the starting material.The structure and morphology of thus prepared graphene were characterized using SEM,TEM,Raman and XPS.The results show that the surface of graphene is smooth and has no obvious wrinkled structure.The preparation conditions of graphene such as the reductionpotential and film thickness were optimized by testing the electrochemical performance.The graphene membraneexhibited excellent electrochemical performance with the reduction potential at-2.0-2.0 V and the 1 μm filmthickness.The specific capacitance value of graphene could reach 123.8 F/g at a current density of 0.1 A/g.