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Acta Physico-Chimica Sinica  2010, Vol. 26 Issue (05): 1254-1258    DOI: 10.3866/PKU.WHXB20100330
ELECTROCHEMISTRY     
Preparation of Chitosan-Based Porous Carbons and Their Application as Electrode Materials for Supercapacitors
JI Qian-Qian, GUO Pei-Zhi, ZHAO Xiu-Song
Laboratory of New Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, School of Chemistry, Chemical Engineering and Environmental Sciences, Qingdao University, Qingdao 266071, Shandong Province, P. R. China; Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
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Abstract  

Four porous carbon samples C-600, C-700, C-800, and C-900 were prepared by the carbonization of chitosan at 600, 700, 800, and 900 ℃ under N2 and had specific surface areas of 278, 461, 515, and 625 m2·g-1, respectively, based on nitrogen adsorption/desorption measurements. Their electrochemical properties were investigated by cyclic voltammetry (CV) and charge-discharge under constant current. The CV curves of C-800 have a rectangular shape and symmetrical anode and cathode processes. The capacitance of C-600, C-700, C-800, and C-900 are 96, 120, 154, and 28 F·g-1 derived fromthe galvanostatic charge-discharge curves at a current density of 50 mA·g-1, respectively. The C-800 composite electrode is highly stable and retains its capacitance well as the capacitance decreased by less than 2% after 1000 cycles at a current density of 1 A·g-1. Furthermore, with an increase in the concentration of the electrolyte, the shape of the CV curves of the C-800 based electrode becomes more and more rectangular and the specific current also increases. The relationship between the pore structures of the four porous carbon samples and their properties is discussed based on the experimental results. We suggest that chitosan-based porous carbon has potential application as electrochemical capacitor electrode materials.



Key wordsSupercapacitor      Electrode      Porous carbon      Chitosan      Capacitance     
Received: 27 August 2009      Published: 02 February 2010
MSC2000:  O646  
Corresponding Authors: GUO Pei-Zhi, ZHAO Xiu-Song     E-mail: pzguo@qdu.edu.cn; chezxs@qdu.edu.cn
Cite this article:

JI Qian-Qian, GUO Pei-Zhi, ZHAO Xiu-Song. Preparation of Chitosan-Based Porous Carbons and Their Application as Electrode Materials for Supercapacitors. Acta Physico-Chimica Sinica, 2010, 26(05): 1254-1258.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20100330     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2010/V26/I05/1254

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