Preparation and characterization of peanut shell-based microporous carbons as electrode materials for supercapacitors

Guo, Pei-Zhi, Ji, Qian-Qian, Zhang, Li-Li, Zhao, Shan-Yu and Zhao, Xiu-Song (2011) Preparation and characterization of peanut shell-based microporous carbons as electrode materials for supercapacitors. Wuli Huaxue Xuebao, 27 12: 2836-2840. doi:10.3866/PKU.WHXB20112836


Author Guo, Pei-Zhi
Ji, Qian-Qian
Zhang, Li-Li
Zhao, Shan-Yu
Zhao, Xiu-Song
Title Preparation and characterization of peanut shell-based microporous carbons as electrode materials for supercapacitors
Journal name Wuli Huaxue Xuebao   Check publisher's open access policy
Translated journal name Acta Physico - Chimica Sinica
ISSN 1000-6818
Publication date 2011-12
Sub-type Article (original research)
DOI 10.3866/PKU.WHXB20112836
Volume 27
Issue 12
Start page 2836
End page 2840
Total pages 5
Place of publication Beijing, China
Publisher Beijing Daxue Huaxue yu Fenzi Gongcheng Xueyuan
Collection year 2012
Language chi
eng
Formatted 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.
Keyword Supercapacitor
Electrode
Microporous carbon
Peanut shell
Capacitance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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