Design of Activated Carbon/Activated Carbon Asymmetric Capacitors

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Title: Design of Activated Carbon/Activated Carbon Asymmetric Capacitors
Authors: Piñeiro-Prado, Isabel | Salinas Torres, David | Ruiz-Rosas, Ramiro | Morallon, Emilia | Cazorla-Amorós, Diego
Research Group/s: Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Supercapacitors | Activated carbons | Electrochemistry | Asymmetric capacitors | Energy storage
Knowledge Area: Química Inorgánica | Química Física
Issue Date: 24-Mar-2016
Publisher: Frontiers Media
Citation: Piñeiro-Prado I, Salinas-Torres D, Ruiz-Rosas R, Morallón E and Cazorla-Amorós D (2016) Design of Activated Carbon/Activated Carbon Asymmetric Capacitors. Front. Mater. 3:16. doi: 10.3389/fmats.2016.00016
Abstract: Supercapacitors are energy storage devices that offer a high power density and a low energy density in comparison with batteries. Their limited energy density can be overcome by using asymmetric configuration in mass electrodes, where each electrode works within their maximum available potential window, rendering the maximum voltage output of the system. Such asymmetric capacitors are optimized using the capacitance and the potential stability limits of the electrodes, with the reliability of the design largely depending on the accuracy and the approach taken for the electrochemical characterization. Therefore, the performance could be lower than expected and even the system could break down, if a well thought out procedure is not followed. In this work, a procedure for the development of asymmetric supercapacitors based on activated carbons is detailed. Three activated carbon materials with different textural properties and surface chemistry have been systematically characterized in neutral aqueous electrolyte. The asymmetric configuration of the masses of both electrodes in the supercapacitor has allowed to cover a higher potential window, resulting in an increase of the energy density of the three devices studied when compared with the symmetric systems, and an improved cycle life.
Sponsor: The authors would like to thank MINECO (CTQ2012/31762, MAT2013-42007-P) and Generalitat Valenciana (PROMETEO/2013/038 and PROMETEOII/2014/010) for the financial support. RRR thanks MINECO for a “Juan de la Cierva” contract (JCI-2012-12664).
ISSN: 2296-8016
DOI: 10.3389/fmats.2016.00016
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2016 Piñeiro-Prado, Salinas-Torres, Ruiz-Rosas, Morallón and Cazorla-Amorós. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Peer Review: si
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