期刊
JOURNAL OF SAUDI CHEMICAL SOCIETY
卷 23, 期 7, 页码 958-966出版社
ELSEVIER
DOI: 10.1016/j.jscs.2019.04.002
关键词
Tars; Activated carbon; Potassium hydroxide; Supercapacitors; Gasification
资金
- President Foundation of Xiamen University [20720150095]
- Natural Science Foundation of China [21206142]
- Energy development Foundation of college of Energy, Xiamen University [2017NYFZ02]
For the first time, toxic bio-tars collected from the gasification of pine sawdust are used as the precursor for activated carbons. Various types of activation agents including KOH, K2CO3, H3PO4 and ZnCl2 were screened for obtaining superior activated carbons. When KOH was used as an activation agent, the obtained activated carbons exhibited high specific surface area and large mesopore volume. The activated carbons were further employed to be the electrode material of supercapacitors, and its specific capacitance reached up to 260 F g(-1) at 0.25 A g(-1) current density. Also, it showed an excellent rate performance from preserving a relatively high specific capacitance of 151 F g(-1) at 50 A g(-1). The assembled device also exhibited the good electrochemical stability with the capacity retention of 90% after 5000 cycles. Furthermore, the maximum energy density of the activated carbons in organic electrolyte reached 17.8 Wh kg(-1). (C) 2019 King Saud University. Production and hosting by Elsevier B.V.
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