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Improvement in electrochemical capacitance of activated carbon from scrap tires by nitric acid treatment |
Yan HAN1,2,3,Ping-Ping ZHAO1,2,3,Xiao-Ting DONG1,2,3,Cui ZHANG1,2,3,*( ),Shuang-Xi LIU1,2,3,*( ) |
1. Institute of New Catalytic Materials Science, College of Chemistry, Nankai University, Tianjin 300071, China 2. Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, China 3. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China |
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Abstract Activated carbon (AC) obtained from the industrial pyrolytic tire char is treated by concentrated nitric acid (AC-HNO3) and then used as the electrode material for supercapacitors. Surface properties and electrochemical capacitances of AC and AC-HNO3 are studied. It is found that the morphology and the porous texture for AC and AC-HNO3 have little difference, while the oxygen content increases and functional groups change after the acid treatment. Electrochemical results demonstrate that the AC-HNO3 electrode displays higher specific capacitance, better stability and cycling performance, and lower equivalent series resistance, indicating that AC obtained from the industrial pyrolytic tire char treated by concentrated nitric acid is applicable for supercapacitors.
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| Keywords
pyrolytic tire char
activated carbon (AC)
nitric acid treatment
electrochemical capacitance
supercapacitor
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Corresponding Author(s):
Cui ZHANG
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Issue Date: 04 December 2014
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