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

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Título: Electrochemical methods to enhance the capacitance in activated carbon/polyaniline composites
Autor/es: Bleda Martínez, María Jesús | Peng, Chuang | Zhang, Shenguen | Chen, George Z. | Morallon, Emilia | Cazorla-Amorós, Diego
Grupo/s de investigación o GITE: Electrocatálsis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Centro, Departamento o Servicio: 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
Palabras clave: Supercapacitors | Conducting polymers | Polyaniline | Electrochemical methods | Activated carbon
Área/s de conocimiento: Química Física
Fecha de creación: 9-ene-2008
Fecha de publicación: 25-jul-2008
Editor: The Electrochemical Society
Cita bibliográfica: 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
Resumen: 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.
Patrocinador/es: 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
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 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).
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1149/1.2956969
Aparece en las colecciones:INV - GEPE - Artículos de Revistas
INV - MCMA - Artículos de Revistas

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