화학공학소재연구정보센터
Journal of Power Sources, Vol.196, No.3, 1620-1625, 2011
Spark plasma sintered carbon electrodes for electrical double layer capacitor applications
The spark plasma sintering (SPS) is an emerging process for shaping any type of materials (metals, ceramic, polymers and their composites). The advantage of such process is to prepare densified ceramic materials in a very short time, while keeping the materials internal porosity. In the present work, we have used the SPS technique to prepare activated carbon-based electrodes for Electrochemical Double Layer Capacitor applications (EDLC). Self-supported 600 and 300 mu m-thick electrodes were prepared and characterized using of Electrochemical Impedence Spectroscopy and galvanostatic cycling in a non-aqueous 1.5M NEt4BF4 in acetonitrile electrolyte. Electrochemical performance of these sintered electrodes were found to be in the same range - or even slightly better - than the conventional tape-casted activated carbon electrodes. Although organic liquid electrolyte was used to characterize the electrochemical performance of the sintered electrodes, these results demonstrate that the SPS technique could be worth of interesting in the ultimate goal of designing solid-state supercapacitors. (C) 2010 Elsevier B.V. All rights reserved.