Electrochemical methods to enhance the capacitance in activated carbon/polyaniline composites

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Title: Electrochemical methods to enhance the capacitance in activated carbon/polyaniline composites
Authors: Bleda Martínez, María Jesús | Peng, Chuang | Zhang, Shenguen | Chen, George Z. | Morallon, Emilia | Cazorla-Amorós, Diego
Research Group/s: Electrocatálsis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales | University of Nottingham. School of Chemical and Environmental Engineering
Keywords: Supercapacitors | Conducting polymers | Polyaniline | Electrochemical methods | Activated carbon
Knowledge Area: Química Física
Date Created: 9-Jan-2008
Issue Date: 25-Jul-2008
Publisher: The Electrochemical Society
Citation: BLEDA MARTÍNEZ, María Jesús, et al. "Electrochemical methods to enhance the capacitance in activated carbon/polyaniline composites". Journal of the Electrochemical Society. Vol. 155, Issue 9 (2008). ISSN 0013-4651, pp. A672-A678
Abstract: Activated carbon/polyaniline composites have been prepared using different electrochemical methods: single-step potentiostatic polymerization, multiple-step potentiostatic polymerization, and potentiodynamic polymerization with the anodic potential limits being fixed at either 0.75 or 1 V (vs Ag/AgCl). The prepared composite samples were characterized by cyclic voltammetry, galvanostatic charge-discharge tests, electrochemical impedance spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. The synthesis conditions were found to strongly affect the electrochemical behavior of the samples. High capacitance was achieved by the potentiostatic polymerization methods. As a general trend, higher capacitance and lower resistance were observed in the composites than the sum of these parameters of the individual components. This benefit is attributed to the enhanced electron delocalization along the polymer chains in the composites resulting from the influence of the activated carbon, as evidenced by the FTIR. However, an influence of the polyaniline morphology induced by the porous carbon cannot be discarded.
Sponsor: MEC (project no. CTQ2006-08958/PPQ and no. MAT2007-60621) and Generalitat Valenciana-Feder (FTIR Microscopy equipment).
URI: http://hdl.handle.net/10045/10516
ISSN: 0013-4651
DOI: 10.1149/1.2956969
Language: eng
Type: info:eu-repo/semantics/article
Rights: © The Electrochemical Society, Inc. 2008. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in J. Electrochem. Soc., Volume 155, Issue 9, pp. A672-A678 (2008).
Peer Review: si
Publisher version: http://dx.doi.org/10.1149/1.2956969
Appears in Collections:INV - GEPE - Artículos de Revistas
INV - MCMA - Artículos de Revistas

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