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Acta Physico-Chimica Sinca  2016, Vol. 32 Issue (2): 493-502    DOI: 10.3866/PKU.WHXB201511131
ARTICLE     
Preparation and Performance of Polypyrrole/Nitric Acid Activated Carbon Aerogel Nanocomposite Materials for Supercapacitors
Ya-Jie LI,Xing-Yuan NI*(),Jun SHEN,Dong LIU,Nian-Ping LIU,Xiao-Wei ZHOU
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Abstract  

Polypyrrole (PPY)/nitric acid (HNO3) activated carbon aerogel (HCA) composites are prepared through chemical oxidative polymerization with different PPY/HCAmass ratios. Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM) were employed to investigate the components and morphology of the samples. The results demonstrate that the synthesized materials maintain the threedimensional nanoporous structure of the carbon aerogel (CA); the activation by nitric acid and composition with PPY do not destroy the porous structure of the carbon aerogel and the complex still has the original threedimensional nanoporous structure. Composites with different mass ratios (3:1, 2:1, 1:1, 1:2, 1:3) of PPY/HCA were prepared and the electrochemical properties were measured by cyclic voltammetry, galvanostatic charge-discharge test, and electrochemical impedance spectroscopy. The results confirm that the PPY/HCA composite with a ratio of 1:1 exhibits the best electrochemical performances; it has a high specific capacitance of 336 F·g-1, which is more than two times higher than that of CA (103 F·g-1); it also exhibits outstanding conductivity and cycling stability, retaining 91% of its initial capacitance after 2000 cycles. Therefore, this composite is quite a promising electrode material for supercapacitors.



Key wordsActivated carbon aerogel      Polypyrrole      Supercapacitor      Chemical oxidative polymerization      Composite electrode material      Capacitive property     
Received: 25 June 2015      Published: 13 November 2015
MSC2000:  O646  
Fund:  the National Natural Science Foundation of China(51072137, 50802064, 11074189);Key Projects in the NationalScience & Technology Pillar Program, China(2009BAC62B02);Shanghai Committee of Science and Technology, China(11nm0501600)
Corresponding Authors: Xing-Yuan NI     E-mail: nixingyuan@tongji.edu.cn
Cite this article:

Ya-Jie LI,Xing-Yuan NI,Jun SHEN,Dong LIU,Nian-Ping LIU,Xiao-Wei ZHOU. Preparation and Performance of Polypyrrole/Nitric Acid Activated Carbon Aerogel Nanocomposite Materials for Supercapacitors. Acta Physico-Chimica Sinca, 2016, 32(2): 493-502.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB201511131     OR     http://www.whxb.pku.edu.cn/Y2016/V32/I2/493

 
 
 
 
 
 
 
 
Sample Specific capacitance/(F?g-1)
5 mV?s-1 10 mV?s-1 50 mV?s-1 100 mV?s-1
CA103958780
HCA139136133124
PPY-HCA-11336325257228
PPY-HCA-21316295221214
PPY-HCA-31334318229174
PPY-HCA-12210191171150
PPY-HCA-13202185174140
 
 
 
 
 
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