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Synthesis and electrochemical properties of three-dimensional graphene/polyaniline composites for supercapacitor electrode materials |
Zhao Wen (赵文), He Da-Wei (何大伟), Wang Yong-Sheng (王永生), Du Xiang (杜翔), Xin Hao (忻昊) |
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China |
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Abstract To improve the specific capacitance and rate capability of electrode material for supercapacitors, three-dimensional graphene/polyaniline (3DGN/PANI) composite is prepared via in situ polymerization on GN hydrogel. PANI grows on the GN surface as a thin film, and its content in the composite is controlled by the concentration of reaction monomer. The specific capacitance of 3DGN/PANI composite containing 10 wt% PANI reaches 322.8 F·g-1 at a current density of 1 A·g-1, nearly twice as large as that of the pure 3DGN (162.8 F·g-1). The capacitance of the composite is 307.9 F·g-1 at 30 A·g-1 (maintaining 95.4%), and 89% retention after 500 cycles. This study demonstrates the exciting potential of 3DGN/PANI with high capacitance, excellent rate capability and long cycling life for supercapacitors.
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Received: 06 October 2014
Revised: 22 November 2014
Accepted manuscript online:
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PACS:
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72.80.Tm
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(Composite materials)
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82.45.Rr
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(Electroanalytical chemistry)
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61.48.Gh
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(Structure of graphene)
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Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2011CB932700 and 2011CB932703), the National Natural Science Foundation of China (Grant Nos. 61335006, No 61378073, and 61077044), the Beijing Natural Science Foundation, China (Grant No. 4132031), and the Fundamental Research Funds for the Central Universities of Beijing Jiao tong University, China (Grant No. 2014YJS136). |
Corresponding Authors:
He Da-Wei
E-mail: dwhe@bjtu.edu.cn
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Cite this article:
Zhao Wen (赵文), He Da-Wei (何大伟), Wang Yong-Sheng (王永生), Du Xiang (杜翔), Xin Hao (忻昊) Synthesis and electrochemical properties of three-dimensional graphene/polyaniline composites for supercapacitor electrode materials 2015 Chin. Phys. B 24 047204
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