聚苯胺复合石墨烯纳米卷的制备及其在超级电容器中的应用（英文）

Preparation of graphene nanoscroll/polyaniline composites and their use in high performance supercapacitors

石墨烯纳米卷是一种具有开放式螺旋状纳米卷结构的管状石墨烯。以石墨烯纳米卷为模板,利用原位聚合的方法,将聚苯胺生长在石墨烯纳米卷表面。通过对材料形貌进行表征,发现聚苯胺均匀地分布在石墨烯纳米卷表面。分别对3种不同单体浓度的聚苯胺复合石墨烯纳米卷进行电化学性能考察,结果发现石墨烯纳米卷和聚苯胺产生的协同效应使得复合卷在继承石墨烯纳米卷良好的倍率特性同时显著地提升了比电容,在1 A/g时比电容可达320 F/g,100A/g时仍可以保持92.1%的初始电容,为制备高比容、快速充放电的石墨烯纳米卷基超级电容器奠定了基础。

The graphene nanoscroll is a kind of tubular graphene with an open end and a helical nanostructure. Different amountsof polyaniline were formed on the surface of the nanoscroll by the in-situ polymerization of aniline. SEM observation shows thatthe polyaniline nanoparticles are evenly distributed on the nanoscrolls and the number of free polyaniline clusters increases with the amount of monomer used. The electrochemical performance of three composites with different polyaniline/graphene nanoscroll ratios was evaluated. The best specific capacitance of the composites reaches 320 F/g at 1 A/g and a 92.1% retention capacitance rate is obtained at 100 A / g, indicating that the composite has a rate performance as good as graphene nanoscrolls and a higher specific ca-pacitance.