Polyaniline/porous carbon electrodes by chemical polymerisation: effect of carbon surface chemistry
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Título: | Polyaniline/porous carbon electrodes by chemical polymerisation: effect of carbon surface chemistry |
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Autor/es: | Bleda Martínez, María Jesús | Morallon, Emilia | Cazorla-Amorós, Diego |
Grupo/s de investigación o GITE: | Materiales Carbonos y Mediambiente | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Departamento de Química Física |
Palabras clave: | Activated carbon | Polyaniline | Surface oxygen complexes | Capacitance | Chemical polymerisation |
Área/s de conocimiento: | Química Inorgánica | Química Física |
Fecha de creación: | 2006 |
Fecha de publicación: | 20-abr-2007 |
Editor: | Elsevier |
Cita bibliográfica: | 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 |
Resumen: | 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. |
Patrocinador/es: | 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 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.electacta.2007.01.073 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas INV - GEPE - Artículos de Revistas |
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Polyaniline-porous carbon electrodes by chemical polymerisation.pdf | Versión final (acceso restringido) | 444,63 kB | Adobe PDF | Abrir Solicitar una copia |
Electrochimica Acta_aceptado.pdf | Versión revisada (acceso libre) | 430,28 kB | Adobe PDF | Abrir Vista previa |
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