HE Xiao-jun, WANG Ting, QIU Jie-shan, ZHANG Xiao-yong, WANG Xiao-ting, ZHEN. Effect of microwave-treatment time on the properties of activated carbons for electrochemical capacitors. New Carbon Mater., 2011, 26(4): 313-319. doi: 10.1016/S1872-5805(11)60084-X
Citation:
HE Xiao-jun, WANG Ting, QIU Jie-shan, ZHANG Xiao-yong, WANG Xiao-ting, ZHEN. Effect of microwave-treatment time on the properties of activated carbons for electrochemical capacitors. New Carbon Mater., 2011, 26(4): 313-319. doi: 10.1016/S1872-5805(11)60084-X
HE Xiao-jun, WANG Ting, QIU Jie-shan, ZHANG Xiao-yong, WANG Xiao-ting, ZHEN. Effect of microwave-treatment time on the properties of activated carbons for electrochemical capacitors. New Carbon Mater., 2011, 26(4): 313-319. doi: 10.1016/S1872-5805(11)60084-X
Citation:
HE Xiao-jun, WANG Ting, QIU Jie-shan, ZHANG Xiao-yong, WANG Xiao-ting, ZHEN. Effect of microwave-treatment time on the properties of activated carbons for electrochemical capacitors. New Carbon Mater., 2011, 26(4): 313-319. doi: 10.1016/S1872-5805(11)60084-X
1. School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Coal Clean Conversion and Utilization,
2.
Anhui University of Technology, Maanshan 243002, China|
Funds:
National Natural Science Foundation of China (50802002, 20836002 and 20725619), Natural Science Foundation of Anhui Province of China(KJ2008A120).
HE Xiao-jun(1973-), male, Ph D., engaged in research on carbon materials for energy storage. Tel: +86-555-2311807|Fax: +86-555-2311822. E-mail: xjhe@ahut.edu.cn
Activated carbons (ACs) made from petroleum coke by KOH activation were further treated by microwaves to investigate the effect of microwave-treatment time on the pore structure, the surface properties (functional groups) and the electrochemical properties of the as-made ACs for electrochemical capacitors (ECs). Results show that the specific capacitance and the equivalent series resistance of microwave-treated ACs become smaller with a decrease in the Brunauer-Emmett-Teller surface area and the total pore volume (vt) of the treated ACs. Compared with the AC sample heated at 1073K for 1h by a conventional heating method, the AC sample treated by microwaves at 700W for only 7min has a pore size distribution with a high (meso- and macropore volume)/vt ratio and a high carbonyl content, and exhibits a high energy density and powder density as an electrode of ECs. This has clearly shown that the microwave-treatment is a simple and efficient approach to obtain high-performance ACs for ECs.
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