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Acta Phys. Chim. Sin.  2011, Vol. 27 Issue (12): 2836-2840    DOI: 10.3866/PKU.WHXB20112836
ELECTROCHEMISTRY AND NEW ENERGY     
Preparation and Characterization of Peanut Shell-Based Microporous Carbons as Electrode Materials for Supercapacitors
GUO Pei-Zhi1, JI Qian-Qian1, ZHANG Li-Li2, ZHAO Shan-Yu2, ZHAO Xiu-Song1,2
1. 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;
2. Department of Chemical and Biomolecular Engineering, National University of Singapore,4 Engineering Drive 4, Singapore 117576
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Abstract  Microporous carbons (PSC-1 and PSC-2) were obtained directly by the carbonization of peanut shells without and with NaOH solution pretreatment, respectively. Both samples have a main pore size of ~0.8 nm. The surface area increases from 552 m2·g-1 for PSC-1 to 726 m2·g-1 for PSC-2. Cyclic voltammograms (CVs) of the PSC-1 and PSC-2 electrodes and the symmetrical supercapacitors show almost rectangular shape indicating excellent capacitance features. The specific capacitances of PSC-1 and PSC-2 can reach 233 and 378 F·g-1, respectively, at a current density of 0.1 A·g-1 in a three-electrode system using porous carbon as the working electrode, a platinum electrode as the counter electrode and a Ag/AgCl electrode as the reference electrode. Furthermore, the electrodes in both three-electrode systems and supercapacitors show high stability and capacitance retainability after 1000 cycles. The formation mechanisms for the two microporous carbons and the relationship between the carbon materials and their electrochemical properties are discussed based on the experimental results.

Key wordsSupercapacitor      Electrode      Microporous carbon      Peanut shell      Capacitance     
Received: 18 July 2011      Published: 13 October 2011
MSC2000:  O646  
Fund:  

The project was supported by the National Natural Science Foundation of China (20803037, 21143006), Foundation of Qingdao Municipal Science and Technology Commission, China (11-2-4-2-(8)-jch) and“Taishan Scholar”Program of Shandong Province, China.

Corresponding Authors: GUO Pei-Zhi, ZHAO Xiu-Song     E-mail: pzguo@qdu.edu.cn; chezxs@qdu.edu.cn
Cite this article:

GUO Pei-Zhi, JI Qian-Qian, ZHANG Li-Li, ZHAO Shan-Yu, ZHAO Xiu-Song. Preparation and Characterization of Peanut Shell-Based Microporous Carbons as Electrode Materials for Supercapacitors. Acta Phys. Chim. Sin., 2011, 27(12): 2836-2840.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20112836     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2011/V27/I12/2836

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