A Free-standing Graphene-Polypyrrole Hybrid Paper via Electropolymerization with an Enhanced Areal Capacitance
By Shu, Kewei; Wang, Caiyun; Zhao, Chen; Ge, Yu; Wallace, Gordon G.
Published in Electrochimica Acta
NULL
2016
Abstract
Abstract Here we developed a free-standing reduced graphene oxide (rGO)-polypyrrole (PPy) hybrid paper via electropolymerization on a paper-like graphene gel. This flexible hybrid paper displayed a uniform layered structure with {PPy} coated onto the graphene layers. A high areal mass of 2.7 mg cm?2 could be obtained. It delivered a greatly enhanced areal capacitance of 440 mF cm?2 at 0.5 A g?1, in contrast to that 151?198.5 mF cm?2 previously reported for graphene paper or polypyrrole-graphene paper. It can retain ?81% of the initial capacitance at a high current density of 6 A g?1. The combined high flexibility with outstanding electrochemical performance, makes such novel hybrid paper a promising electrode for flexible supercapacitors.
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