A Free-standing Graphene-Polypyrrole Hybrid Paper via Electropolymerization with an Enhanced Areal Capacitance

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• 作者：Kewei Shu ; Caiyun Wang ; ^{caiyun@uow.edu.au" class="auth_mail" title="E-mail the corresponding author} ; Chen Zhao ; Yu Ge ; Gordon G. Wallace ; ^{gwallace@uow.edu.au" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Graphene ; Areal capacitance ; Polypyrrole ; Supercapacitor ; Flexible hybrid paper electrode
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 September 2016
• 年：2016
• 卷：212
• 期：Complete
• 页码：561-571
• 全文大小：4631 K

文摘

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.