Activated carbon/graphene composites with high-rate performance as electrode materials for electrochemical capacitors
Activated carbon/graphene composites with high-rate performance as electrode materials for electrochemical capacitors
复制标题
活性炭/石墨烯复合材料作为电化学电容器电极材料具有高倍率性能
DOI：
10.1007/s10008-013-2217-x
复制
发表时间：
2013-11-01
影响因子：
2.5
通讯作者：
Yi, Baolian
中科院分区：
文献类型：
--
作者：
Jiang, Lei;Yan, Jingwang;Yi, Baolian
葡萄糖基活性碳(GAC)/氧化石墨烯(RGO)复合材料是由前驱体(葡萄糖和氧化石墨烯的水溶液)预碳化和KOH活化热解产物制备的。研究了前驱体中氧化石墨烯(GO)的质量分数对GAC/RGO复合材料电化学电容器电极材料电化学性能的影响。结果表明，热还原后的氧化石墨烯作为一种起皱的载体来支撑活化后的活性碳颗粒。GO的质量分数决定了其孔径分布和比表面积。此外，通过在前驱体中引入GO，提高了GAC的倍率性能。由GO质量分数为3%的前驱体制备的GAc/−复合材料的比电容最高，为334F/RGO1。
Glucose-derived activated carbon (GAC)/reduced graphene oxide (RGO) composites are prepared by pre-carbonization of the precursors (aqueous mixture of glucose and graphene oxide) and KOH activation of the pyrolysis products. The effect of the mass ratio of graphene oxide (GO) in the precursor on the electrochemical performance of GAC/RGO composites as electrode materials for electrochemical capacitors is investigated. It is found that the thermally reduced graphene oxide sheets serves as a wrinkled carrier to support the activated carbon particles after activation. The pore size distribution and surface area are depended on the mass ratio of GO. Besides, the rate capability of GAC is improved by the introduction of GO in the precursor. The highest specific capacitance of 334 F g−1is achieved for the GAC/RGO composite prepared from the precursor with a GO mass ratio of 3 %.