Activated Carbon Fiber Monoliths as Supercapacitor Electrodes

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Title: Activated Carbon Fiber Monoliths as Supercapacitor Electrodes
Authors: Moreno-Fernandez, Gelines | Ibáñez Ulargui, Joaquín | Rojo, José M. | Kunowsky, Mirko
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica
Keywords: Activated carbon fibers | Monoliths | Supercapacitor electrodes
Knowledge Area: Química Inorgánica
Issue Date: 28-Jun-2017
Publisher: Hindawi Publishing Corporation
Citation: Advances in Materials Science and Engineering. Volume 2017 (2017), Article ID 3625414, 8 pages. doi:10.1155/2017/3625414
Abstract: Activated carbon fibers (ACF) are interesting candidates for electrodes in electrochemical energy storage devices; however, one major drawback for practical application is their low density. In the present work, monoliths were synthesized from two different ACFs, reaching 3 times higher densities than the original ACFs’ apparent densities. The porosity of the monoliths was only slightly decreased with respect to the pristine ACFs, the employed PVDC binder developing additional porosity upon carbonization. The ACF monoliths are essentially microporous and reach BET surface areas of up to 1838 m2 g−1. SEM analysis reveals that the ACFs are well embedded into the monolith structure and that their length was significantly reduced due to the monolith preparation process. The carbonized monoliths were studied as supercapacitor electrodes in two- and three-electrode cells having 2 M H2SO4 as electrolyte. Maximum capacitances of around 200 F g−1 were reached. The results confirm that the capacitance of the bisulfate anions essentially originates from the double layer, while hydronium cations contribute with a mixture of both, double layer capacitance and pseudocapacitance.
Sponsor: Financial support through the projects of reference MAT2014-57687-R, GV/FEDER (PROMETEOII/2014/010), and University of Alicante (VIGROB-136) is gratefully acknowledged.
ISSN: 1687-8434 (Print) | 1687-8442 (Online)
DOI: 10.1155/2017/3625414
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 Gelines Moreno-Fernandez et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Peer Review: si
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Appears in Collections:INV - MCMA - Artículos de Revistas

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