摘要
采用水热法将氧化石墨烯和氧化碳黑均匀分散体系还原,制得石墨烯/碳黑复合材料。用X射线衍射、场发射扫描电镜、循环伏安法、恒流充放电和电化学阻抗谱等技术,对该复合材料的结构及其电化学性能进行表征。结果表明:纳米碳黑颗粒成功插入到石墨烯片层之间,且有效抑制了石墨烯的团聚,增大了石墨烯片层间距,形成具有开放纳米通道的三维结构;该复合材料的比电容和倍率性能明显优于单一的石墨烯。
A reduced graphene/carbon black composite was prepared by reducing homogeneous mixed suspensions of graphene oxide and carbon black oxide with hydrothermal method. The structure and electrochemical performance of the composite were characterized by the techniques of X-ray diffraction and field emission scanning electron microscope, cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The results show that the nano-sized carbon black particles are successfully intercalated into graphene nanosheets, the agglomeration of graphene nanosheets is effectively restrained, the graphene layer spacing increases,and a composite with open 3-D channel structure is formed. The specific capacitance and rate capability of the composite are obviously better than those of the pristine graphene.
出处
《安徽工业大学学报（自然科学版）》
CAS
2017年第2期129-133,共5页
Journal of Anhui University of Technology（Natural Science）
基金
安徽省教育厅自然科学研究重点项目(KJ2012A045)
关键词
超电容性能
石墨烯
碳黑
复合材料
supercapacitive performance
graphene
carbon black
composite
