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Effect of Microwave-Treatment Power on the Properties of Activated Carbons as Electrode Materials for Supercapacitors

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Abstract:

Activated carbons (ACs) from petroleum coke by microwave heating KOH activation are treated by microwave to investigate the effect of microwave−treatment power on AC properties. The electrochemical properties of AC electrodes for supercapacitors were investigated by cyclic voltammetry, constant current charge−discharge and electrochemical impedance spectroscopy. The results showed that specific surface area (SBET) and total pore volume of microwave−treated ACs, specific capacitance and energy density of microwave−treated AC electrodes decreased. The electrical conductivity and stability of AC electrodes for supercapacitors were improved. Fast microwave−treatment is an efficient method to obtain suitable ACs for supercapacitors.

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Periodical:

Advanced Materials Research (Volumes 194-196)

Pages:

2151-2155

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.194-196.2151

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Online since:

February 2011

Authors:

Xiao Jun He, Ru Chun Li, Ming Dong Zheng, Ting Wang, Xiao Yong Zhang

Keywords:

Activated Carbon (AC), Microwave−Treatment, Specific Capacitance, Super-Capacitor (SC)

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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References

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