摘要
以氧化石墨烯(GO)为基体,采用界面聚合法制备了聚苯胺纳米纤维/氧化石墨烯的复合物(PA-NI/GO),经水合肼还原和APS再氧化得到聚苯胺纳米纤维/石墨烯复合物(PANI/GR)。用FT-IR、UV-Vis、XRD、SEM和TEM对复合物的结构和形貌进行表征,结果表明氧化石墨烯不仅为苯胺提供了聚合的基体,同时对聚苯胺有掺杂作用,聚苯胺纤维夹在片状石墨烯之间呈现"三明治"结构。通过循环伏安和恒流充放电测试发现,PANI/GR复合材料表现出双电层电容和法拉第赝电容双重特点,受协同效应的作用,在电流密度为400mA/g时,比容量高达460F/g,呈现出优异的电化学活性。
A composite of graphene oxide（GO） and polyaniline（PANI） nanofibers was prepared by interfacial polymerization of aniline monomer using graphene oxide as substrates.The obtained PANI/graphene oxide composite was reduced to give the PANI nanofibers/graphene composite（PANI/GR） using hydrazine followed by reoxidation of ammonium peroxydisulfate（APS）.The morphology and structure of the composites were characterized by FT-IR,UV-Vis,XRD,SEM and TEM.It was found that the GO provided the substrates for polymerization of aniline,meanwhile had a doping effect on PANI.The ＂sandwich＂ structure composite was obtained in which the PANI fibers were between the graphene sheets.It exhibited the double-layer capacitor as well as Faraday pseudocapacitor charateristics,the highest specific capacitance of 460 F/g at a current density of 400mA/g due to synergistic effect between the two components,by cyclic voltammetry and galvanostatic charge-discharge analysis.The product shows a good electrochemical activity.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第4期562-565,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51173072)
关键词
石墨烯
界面聚合
聚苯胺纳米纤维
电化学性能
graphene
PANI nanofibers
interfacial polymerization
electrochemical property
