A Free-standing Graphene-Polypyrrole Hybrid Paper via Electropolymerization with an Enhanced Areal Capacitance
By Kewei Shu and Caiyun Wang and Chen Zhao and Yu Ge and Gordon G. Wallace
Published in Electrochimica Acta
NULL
2016
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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