影响热还原氧化石墨烯超级电容器性能的因素比较（英文）

发布时间：2018-01-27 10:40

本文关键词： 石墨烯赝电容超级电容器表面官能团热还原　出处：《电化学》2014年06期 　论文类型：期刊论文

【摘要】：通过改进的Hummer法制得氧化石墨烯,并在不同温度的氩气气氛中还原得到一系列热还原氧化石墨烯(T-RGO).电化学测试表明,T-RGO作为超级电容器电极材料时,良好的导电性是必需的,但石墨烯表面含氧官能团对其电容性能的影响要远大于导电性和比表面积的影响.900oC还原的T-RGO比表面积为314 m2·g-1,电导率为2421 S·m-1,但其容量只有56 F·g-1.而300 oC还原的T-RGO比表面积为18.8 m2·g-1,电导率为574 S·m-1,其容量却达到281 F·g-1.材料表征分析表明,300 oC还原的石墨烯之所以有更高的电容,是因为除双电层电容外,更多的是由其表面含氧官能团提供的赝电容,这使作者以后在设计制备超级电容器等储能设备用石墨烯基电极材料时更加有针对性.
[Abstract]:Graphene oxide was prepared by improved Hummer method and a series of thermal reductive graphene oxide (T-RGON) were obtained by reduction in argon atmosphere at different temperatures. When T-RGO is used as electrode material for supercapacitor, good conductivity is necessary. However, the effect of oxygen functional groups on the surface of graphene is much greater than that of conductivity and specific surface area. The specific surface area of T-RGO reduced by .900oC is 314 m ~ 2 路g ~ (-1). The conductivity is 2421 S 路m -1, but its capacity is only 56 F 路g -1. The specific surface area of T-RGO reduced by 300oC is 18.8 m2 路g -1. The conductivity is 574s 路m -1, but its capacity is 281 F 路g -1. The analysis of the material characterization shows that the graphene reduced by 300oC has higher capacitance. This is due to the fact that, in addition to the double-layer capacitance, the pseudo-capacitance provided by the oxygen-containing functional groups on the surface of the capacitor makes the author more specific in designing and preparing graphene based electrode materials for energy storage equipment such as supercapacitors.
【作者单位】：兰州理工大学材料科学与工程学院;中国科学院兰州化学物理研究所清洁能源化学与材料实验室;
【基金】：supported by The Top Hundred Talents Program of the Chinese Academy of Sciences National Natural Science Foundations of China(No.51005225,No.21203223)
【分类号】：TM53;O613.71
【正文快照】： Environmentally friendly,high-performancemesoporous carbon,carbon aerogels and carbonenergy-storage system is crucial for the survival ofnanofibers have been extensively studied for superca-our civilization[1-2].As a kind of energy storage/conve-pacitors

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