水热组装合成石墨烯/聚苯胺/石墨烯复合电极材料的研究

Hydrothermally assembled synthesis of sandwich-like graphene/polyaniline/graphene electrode materials

通过在氧化石墨烯表面原位聚合苯胺制备聚苯胺阵列/石墨烯复合物,再将一定量的石墨烯加入到复合物分散液中,经水热反应制备了石墨烯/聚苯胺/石墨烯复合材料。利用SEM和FT-IR对其形貌和结构进行了表征,讨论了投料比、水热温度及水热时间对材料电化学性能的影响。结果表明,质量比PGO∶GO(后加的)=15∶1,180℃下水热反应4h,所得样品用作超级电容器电极时,表现出优异的电化学性能,当电流密度为1A/g时,其比电容为553F/g;且在电流密度为20A/g,1000次恒电流充放电后,其比电容保持率高达94.2%。

By in-situ polymerization of aniline on the surface of graphene oxide（GO）, the PANI/GO composites （PGO） were prepared. Then by adding the additional GO, the composites of graphene/PANI/graphene （GPG） were synthesized via a hydrothermal process. The morphologies and structures of the composites were investigated by SEM and FF-IR. By discussing the feed ratio, hydrothermal temperature and hydrothermal time, it is concluded that the sample obtained at 180 ℃ for 4 h with the PGO to GO weight ratio of 15：1 performs the best electrochemical performance as supercapacitors electrode material,which exhibits a high specific capacitance of 553 F/g at a current density of 1 A/g and excellent cycling stability up to 94.2% after 1000 cycles at a current density of 20 A/g.