Comparison of capacitive behavior of activated carbons with different pore structures in aqueous and nonaqueous systems

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dc.contributor.authorZHOU Shao-yun
dc.contributor.authorLI Xin-hai
dc.contributor.authorWANG Zhi-xing
dc.contributor.authorGUO Hua-jun
dc.contributor.authorPENG Wen-jie
dc.date.accessioned2014-04-25T06:41:27Z
dc.date.available2014-04-25T06:41:27Z
dc.date.issued2008
dc.description.abstractThe pore structures of two activated carbons from sawdust with KOH activation and coconut-shell with steam activation for supercapacitor were analyzed by N2 adsorption method. The electrochemical properties of both activated carbons in 6 mol/L KOH solution and 1 mol/L Et4NPF4/PC were compared, and the effect of pore structure on the capacitance was investigated by cyclic voltammetry, AC impedance and charge-discharge measurements. The results indicate that the capacitance mainly depends on effective surface area, but the power property mainly depends on mesoporosity. At low specific current (1 A/g), the maximum specific capacitances of 276.3 F/g in aqueous system and 123.9 F/g in nonaqueous system can be obtained from sawdust activated carbon with a larger surface area of 1 808 m2/g, but at a high specific current, the specific capacitance of coconut-shell activated carbon with a higher mesoporosity of 75.1% is more excellent. Activated carbon by KOH activation is fitter for aqueous system and that by steam activation is fitter for nonaqueous system.en_US
dc.identifier.citationJ. Cent. South Univ. Technol. (2008) 15: 674−678en_US
dc.identifier.urihttp://hdl.handle.net/123456789/546
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.subjectactivated carbonen_US
dc.subjectsupercapacitoren_US
dc.subjectaqueous systemen_US
dc.subjectnonaqueous systemen_US
dc.subjectcapacitanceen_US
dc.titleComparison of capacitive behavior of activated carbons with different pore structures in aqueous and nonaqueous systemsen_US
dc.typeArticleen_US

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