摘要
采用直流电电化学制备了聚吡咯和聚吡咯/石墨烯薄膜电极,研究发现聚吡咯/石墨烯复合电极表面产生了很多小孔和一些羊角状的结构,这可能是由于在聚合过程中,聚合围绕石墨烯吸附对甲基苯磺酸根离子形成的球状体所致。而这些小孔和羊角状的结构在电极的充放电过程中为内层聚吡咯提供了离子交换的通道。在循环伏安的测试中,当扫描速率达到1000mV/S时,聚吡咯/石墨烯复合电极的容量依然保持在229F/g,而纯的PPy电极的容量仅保持在112F/g。
Polypyrrole/graphene oxide composite and polypyrrole electrode were prepared by direct current polymerizationin aqueous solution.Polypyrrole/graphene oxide composite electrode exhibits porous appearance with hollow horns,which can result from polymer forming around the sphere composed of graphene oxide and p-toluene sulfonic acid anion.The pores and hollow horns on polypyrrole/graphene oxide composite electrode provide path for doping ion during charge/discharge process.When the scanning rate reaches 1000mV/S during cyclic voltammograms measure,the specific capacitance for polypyrrole/graphene oxide composite electrode remains 229F/g,while the specific capacitance for polypyrrole electrode is only 112F/g.
基金
国家863计划资助项目（2007AA03Z249）
国家自然科学基金项目（20804030）
