Functionalized graphene–polyaniline nanocomposite as electrode material for asymmetric supercapacitors

Functionalized graphene–polyaniline nanocomposite as electrode material for asymmetric... A polyaniline/sulfonated graphene (PANI/SG) nanostructure was synthesized as electrode material for an asymmetric supercapacitor via a novel in situ chemical oxidative polymerization method including two oxidants. The composite’s structure and morphology were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photo- electron spectroscopy (XPS), field-emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) measurements. Furthermore, the electrochemical performances of the composite were characterized by cyclic voltamm- etry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques in detail. In addition, we have triumphantly manufactured an asymmetric supercapacitor (ASC) employing activated carbon (AC) and PANI/ SG as the positive and negative electrodes, respectively. The ASC possessed an extended potential window (1.4 V), a remarkable cycling property (85.9% capacitance retention after 5000 cycles), and a satisfactory average energy and power density (23 Wh/kg and 6.1 kW/kg). Introduction high-activity electrode material is an essential factor for an effective development of a high-property supercapacitor [14, Since the end of the last century, unprecedented energy con- 15]. sumption and global climate changes are two major problems Recently, various novel electrode materials such as carbon which the world are facing nowadays [1–3]. At present, fossil materials (e.g., graphene, carbon nanotubes), conducting http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Solid State Electrochemistry Springer Journals

Functionalized graphene–polyaniline nanocomposite as electrode material for asymmetric supercapacitors

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Chemistry; Physical Chemistry; Electrochemistry; Energy Storage; Characterization and Evaluation of Materials; Analytical Chemistry; Condensed Matter Physics
ISSN
1432-8488
eISSN
1433-0768
D.O.I.
10.1007/s10008-018-4005-0
Publisher site
See Article on Publisher Site

Abstract

A polyaniline/sulfonated graphene (PANI/SG) nanostructure was synthesized as electrode material for an asymmetric supercapacitor via a novel in situ chemical oxidative polymerization method including two oxidants. The composite’s structure and morphology were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photo- electron spectroscopy (XPS), field-emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) measurements. Furthermore, the electrochemical performances of the composite were characterized by cyclic voltamm- etry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques in detail. In addition, we have triumphantly manufactured an asymmetric supercapacitor (ASC) employing activated carbon (AC) and PANI/ SG as the positive and negative electrodes, respectively. The ASC possessed an extended potential window (1.4 V), a remarkable cycling property (85.9% capacitance retention after 5000 cycles), and a satisfactory average energy and power density (23 Wh/kg and 6.1 kW/kg). Introduction high-activity electrode material is an essential factor for an effective development of a high-property supercapacitor [14, Since the end of the last century, unprecedented energy con- 15]. sumption and global climate changes are two major problems Recently, various novel electrode materials such as carbon which the world are facing nowadays [1–3]. At present, fossil materials (e.g., graphene, carbon nanotubes), conducting

Journal

Journal of Solid State ElectrochemistrySpringer Journals

Published: Jun 2, 2018

References

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