Cetyltrimethylammonium bromide intercalated graphene/polypyrrole nanowire composites for high performance supercapacitor electrode

Polypyrrole (PPy) nanowires were prepared by in situ polymerization of pyrrole in the presence of cetyltrimethylammonium bromide stabilized graphene (GCR). PPy nanowire/GCR composites with different loading ratios were tested as supercapacitor electrode materials in both 1 M H2SO4 (aq) and 1 M KCl (aq) electrolytes, and different electrochemical behaviors were observed. The incorporation of GCR nanosheets into the PPy nanowire matrix obviously improved the electrochemical performance of PPy and a high specific capacitance of 492 F g(-1) can be obtained for PPyGCR91 in 1 M H2SO4 at a current density of 0.2 A g(-1) with good cycling stability.