电化学制备钛网负载聚吡咯/石墨烯复合膜及其在超级电容器中的应用

通过电化学的方法在钛网上制备了聚吡咯与石墨烯的复合物薄膜，其过程是先在钛网上通过自组装干燥膜法附着上石墨烯氧化物膜，而后采用电化学还原的方法原位还原制备得到石墨烯膜，随后加入吡咯单体，再通过电化学聚合的方法在石墨烯的表面生长聚吡咯，得到的聚吡咯开始以颗粒的形式存在，而后随着聚合的进行得到了链状的聚吡咯.得到的复合膜有高的比表面积和导电性，可以作为电极活性材料用于超级电容器中提供赝电容，结果表明，复合膜作为电极材料的超级电容器拥有高的性能，比电容达400 F/g，并且电极的充放电稳定性高，5000次复合膜充放电循环后比电容还能保留82%，说明该材料适合于超级电容器.

Electrochemical Preparation of Polypyrrole/Graphene Films on Titanium Mesh as Active Materials for Supercapacitors

Films of polypyrrole/graphene on titanium mesh were prepared by electrochemical reduction of the fresh dried foam films of graphene oxide followed by an electrochemical polymerization of pyrrole. The as-obtained composite had highly surface area, conductivity, and could be used as the electrode for supercapacitors, especially directly used as the active materials in free of binders while the Ti mesh worked as the collector. Plenty of polypyrrole nanoparticles formed on the surface of reduced graphene film, and some fiber-like aggregates could be formed during the polymerization, which worked as the material for pseudo-capacitance. The specific capacitance of the supercapacitor reached 400 F/g and showed high stability with retaining capacitance of 82% after 5000 cycles, indicating that the nanocomposite is a suitable active material for supercapacitors.