Abstract
Two porous carbon materials, one synthesised by pyrolysis of an organic aerogel prepared using sol–gel method and the other synthesised from molybdenum carbide by high temperature chlorination method, were tested as supercapacitor electrode materials in a non-aqueous tetraalkylammonium salt-based electrolyte. The gravimetric capacitance values calculated for the carbon aerogel (CAG)-based system were almost two times smaller (~55 F g−1) compared to carbide-derived carbon (C(Mo2C))-based system (~125 F g−1). However, due to the very wide region of ideal polarizability, 3.6 V for C(Mo2C) and 3.8 V for CAG-based test cells, very high energy densities up to 63 Wh kg−1 (34 Wh dm−3) and power densities up to 757 kW kg−1 (314 kW dm−3) were estimated for these systems, respectively. CAG-based system shows very short characteristic charge/discharge time constant values (0.05 s).
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Acknowledgements
This work has been partially supported by Estonian Science Foundation Grant No. 8172, Estonian Ministry of Education and Research (project SF0180002s08) and by graduate school ‘Functional materials and processes’ receiving funding from the European Social Fund under project 1.2.0401.09-0079 in Estonia. Prof. Kalle Kirsimäe and Mr. Jaan Aruväli from the Institute of Ecology and Geography and Mrs. Heisi Kurig from the Institute of Chemistry at the University of Tartu are thanked for the help with XRD and adsorption studies of carbon samples.
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Laheäär, A., Peikolainen, AL., Koel, M. et al. Comparison of carbon aerogel and carbide-derived carbon as electrode materials for non-aqueous supercapacitors with high performance. J Solid State Electrochem 16, 2717–2722 (2012). https://doi.org/10.1007/s10008-012-1660-4
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DOI: https://doi.org/10.1007/s10008-012-1660-4