Polyaniline/porous carbon electrodes by chemical polymerisation: effect of carbon surface chemistry

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Title: Polyaniline/porous carbon electrodes by chemical polymerisation: effect of carbon surface chemistry
Authors: Bleda Martínez, María Jesús | Morallon, Emilia | Cazorla-Amorós, Diego
Research Group/s: Materiales Carbonos y Mediambiente | Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Departamento de Química Física
Keywords: Activated carbon | Polyaniline | Surface oxygen complexes | Capacitance | Chemical polymerisation
Knowledge Area: Química Inorgánica | Química Física
Date Created: 2006
Issue Date: 20-Apr-2007
Publisher: Elsevier
Citation: BLEDA MARTÍNEZ, María Jesús; MORALLÓN NÚÑEZ, Emilia; CAZORLA AMORÓS, Diego. "Polyaniline/porous carbon electrodes by chemical polymerisation: effect of carbon surface chemistry". Electrochimica Acta. Vol. 52, Issue 15 (20 Apr. 2007). ISSN 0013-4686, pp. 4962-4968
Abstract: Polyaniline/porous carbon composite electrodes were prepared by chemical polymerisation and characterized in terms of porosity and performance as electrochemical capacitors. To obtain the composite electrodes two methods were used. The first method consisted of mixing, directly, the activated carbon with chemically polymerised polyaniline. The second one consisted of mixing the activated carbon with aniline and subsequent chemical polymerisation. Additionally, the second process was carried out with the porous carbon previously thermally treated in N2 up to 900 °C in order to remove surface oxygen groups. Changes in porosity with the polyaniline addition were analysed. It has been proved that the method used strongly affects the porous structure. Dealing with the electrochemical performance, polyaniline and carbon mechanically mixed seem to work independently, being the composite behaviour a combination of the corresponding performance of both materials separately. The composites prepared by the second method (polymerisation over carbon) reveal the key role of surface chemistry in polyaniline coating. Aniline reacts with the oxygen complexes and their positive effect in capacitance is not observed. The second method (polymerisation over carbon) using a thermally treated carbon seems to be the best one since a more porous (or thinner) polyaniline film is produced.
Sponsor: The authors thank MEC for financial support (Project PPQ2003-03884 andMAT 2004-01479).
URI: http://hdl.handle.net/10045/2642
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2007.01.073
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.electacta.2007.01.073
Appears in Collections:INV - MCMA - Artículos de Revistas
INV - GEPE - Artículos de Revistas

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