石墨烯与聚苯胺复合材料的制备及在超级电容器中的应用

发布时间：2018-05-09 19:26

本文选题：电极材料 + 超级电容器　；参考：《北京交通大学》2014年硕士论文

【摘要】：摘要：石墨烯材料作为新型结构碳材料,具有优异的电学、力学、光学等特性,与导电聚合物复合,是高性能超级电容器电极材料的热点问题。本文以高性能的超级电容器电极材料为目标,制备了石墨烯材料、聚苯胺材料、氧化石墨烯／聚苯胺和石墨烯／聚苯胺复合材料以及将其作为电极材料组装成了超级电容器,并对比分析了这些电极材料的性能差别,主要研究内容如下： (1)采用Hummers法制备了单层氧化石墨烯和通过混合气体还原方法制备了石墨烯,通过SXR、XRD、FTIR表征手段对其进行了分析。 (2)采用扣式结构组装了石墨烯、活性炭超级电容器,选取了KOH作为电解液,测试了其循环伏安曲线、恒流充放电曲线和交流阻抗曲线。计算出了比电容量、能量密度等电学性质,并对其性能进行了比较分析。 (3)采用化学氧化法制备了纯聚苯胺,原位聚合法制备了氧化石墨烯／聚苯胺复合材料,通过SXR、XRD、FTIR表征手段对其进行了分析,证实了氧化石墨烯与聚苯胺成功复合。 (4)研究了聚苯胺和氧化石墨烯／聚苯胺在H2SO4电解液中的电化学测试,包括循环伏安测试、恒流充放电测试和交流阻抗测试。研究了此电极材料对电容器性能的影响,计算出了比电容量、能量密度等电学性质,并对其性能进行了比较分析。(5)采用原位聚合法制备了石墨烯／聚苯胺复合材料,通过改变了苯胺量、石墨烯量在复合材料中的百分含量,利用SXR、XRD、FTIR表征结果,进行了比较,来控制复合材料的形貌。 (6)采用扣式结构组装了不同配比的石墨烯／聚苯胺超级电容器,测试了其在KOH电解液中的循环伏安曲线、恒流充放电曲线和交流阻抗曲线。计算出了比电容量、能量密度等电学性质,并与石墨烯电极材料的电化学性能进行了综合比较分析。
[Abstract]:Abstract: as a new type of structural carbon material, graphene material has excellent electrical, mechanical and optical properties, and is combined with conductive polymer, which is a hot issue in electrode materials of high performance supercapacitors. In this paper, graphene materials, Polyaniline materials, graphene oxide / Polyaniline and graphene / Polyaniline composites were prepared and assembled as electrode materials to form supercapacitors. The properties of these electrode materials are compared and analyzed. The main research contents are as follows: (1) graphene oxide monolayer was prepared by Hummers method and graphene was prepared by gas mixture reduction method. (2) graphene and activated carbon supercapacitors were assembled with button structure, and KOH was selected as electrolyte. The cyclic voltammetry curves, constant current charge-discharge curves and AC impedance curves were measured. The electrical properties such as specific capacitance and energy density are calculated, and their performances are compared and analyzed. Pure Polyaniline was prepared by chemical oxidation, and graphene oxide / Polyaniline composite was prepared by in-situ polymerization. The results were analyzed by means of SXRX XRDX FTIR, and it was confirmed that graphene oxide was successfully combined with Polyaniline. The electrochemical measurements of Polyaniline and graphene oxide / Polyaniline in H2SO4 electrolyte were studied, including cyclic voltammetry, constant current charge-discharge test and AC impedance test. The effect of the electrode material on the performance of the capacitor was studied. The electrical properties such as specific capacitance and energy density were calculated, and its properties were compared and analyzed. The graphene / Polyaniline composites were prepared by in-situ polymerization. The morphology of the composites was controlled by changing the content of aniline and the percentage of graphene in the composites. The results were characterized by SXRX XRDX FTIR. (6) the graphene / Polyaniline supercapacitors with different ratios were assembled with button structure. The cyclic voltammetry curves, constant current charge-discharge curves and AC impedance curves of the supercapacitors in KOH electrolyte were measured. The electrical properties such as specific capacitance and energy density were calculated and compared with the electrochemical properties of graphene electrode materials.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM53

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