Graphene Quantum Dots Enhanced Electrochemical Performance of Polypyrrole as Supercapacitor Electrode

Authors

Kun WU, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China;
Si-zhe XU, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China;
Xue-jiao ZHOU, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China;
Hai-xia WU, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China;Follow

Corresponding Author

Hai-xia WU(haixiawu@sjtu.edu.cn)

Abstract

With an objective to develop electrode materials with high specific capacitance and good stability, a completely new nanocomposite of Polypyrrole (PPY) and graphene quantum dots (GQD) was successfully obtained through in-situ polymerization of pyrrole in the presence of GQD suspension. The obtained composites with different mass ratios were characterized by X-Ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). GQD enhanced electrochemical performance of PPY and, as supercapacitor electrodes, the PPY/GQD composites with the mass ratio of PPY to GQD at 50:1 showed a competitive specific capacitance of 485 F·g^-1 at a scan rate of 0.005 V·s^-1. The attenuation of the specific capacitance is about 2% after 2000 cycles. The high specific capacitance and good stability of the PPY/GQD nanocomposites are promising for applications in electrochemical supercapacitors.

Graphical Abstract

Keywords

graphene oxide, graphene quantum dots, polypyrrole, supercapacitor

DOI Link

https://doi.org/10.61558/2993-074X.2122

Publication Date

2013-08-28

Online Available Date

2012-10-30

Revised Date

2012-10-09

Received Date

2012-08-16

Recommended Citation

Kun WU, Si-zhe XU, Xue-jiao ZHOU, Hai-xia WU. Graphene Quantum Dots Enhanced Electrochemical Performance of Polypyrrole as Supercapacitor Electrode[J]. Journal of Electrochemistry, 2013 , 19(4): 361-370.
DOI: 10.61558/2993-074X.2122
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss4/9

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