Issue 10, 2010

A nanostructured graphene/polyaniline hybrid material for supercapacitors

Abstract

A flexible graphene/polyaniline hybrid material as a supercapacitor electrode was synthesized by an in situ polymerization-reduction/dedoping-redoping process. This product was first prepared in an ethylene glycol medium, then treated with hot sodium hydroxide solution to obtain the reduced graphene oxide/polyaniline hybrid material. Sodium hydroxide also acted as a dedoping reagent for polyaniline in the composite. After redoping in an acidic solution, the thin, uniform and flexible conducting graphene/polyaniline product was obtained with unchanged morphology. The chemical structure of the materials was characterized by X-ray photoelectron spectroscopy and Raman spectroscopy. The composite material showed better electrochemical performances than the pure individual components. A high specific capacitance of 1126 F g−1 was obtained with a retention life of 84% after 1000 cycles for supercapacitors. The energy density and power density were also better than those of pure component materials.

Graphical abstract: A nanostructured graphene/polyaniline hybrid material for supercapacitors

Article information

Article type
Paper
Submitted
29 mar 2010
Accepted
02 jun 2010
First published
06 ago 2010

Nanoscale, 2010,2, 2164-2170

A nanostructured graphene/polyaniline hybrid material for supercapacitors

H. Wang, Q. Hao, X. Yang, L. Lu and X. Wang, Nanoscale, 2010, 2, 2164 DOI: 10.1039/C0NR00224K

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