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Lebegue, E., Benoit, C., Brousse, T., Gaubicher, J. & Cougnon, C. (2015) Effect of the Porous Texture of Activated Carbons on the Electrochemical Properties of Molecule-Grafted Carbon Products in Organic Media. J. Electrochem. Soc. 162 A2289–A2295.
Added by: Laurent Cournède (2016-03-10 18:36:42) |
| Type de référence: Article DOI: 10.1149/2.0481512jes Numéro d'identification (ISBN etc.): 0013-4651 Clé BibTeX: Lebegue2015 Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: chemical-modification, composite electrodes, diazonium chemistry, double-layer capacitance, energy-storage, fiber surfaces, mesoporous carbons, pore structure, redox couple, surface-chemistry Créateurs: Benoit, Brousse, Cougnon, Gaubicher, Lebegue Collection: J. Electrochem. Soc. |
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Two commercial activated carbons, different from their texture, were grafted with electroactive molecules and tested for determining what texture is well-suited for the grafting. Microporous and mesoporous carbons, having approximately the same BET surface area, were selected. The electroactive molecule consists in a naphthalimide compound having an amine as surface attachment group. The present work was divided in two parts. In a first part, the modified carbons were characterized by thermal gravimetric analysis, X-ray photoelectron spectroscopy, elemental chemical analysis and nitrogen gas adsorption measurements have been used for studying the impact of the grafting on the textural properties of carbons. In a second part, the electrochemical properties of the modified carbons were studied in propylene carbonate +1 M Bu4NBF4. Results show that the grafting ruins the performances of the microporous carbon, while the mesoporous carbon appears well-suited for the grafting, showing a good compromise between electrolyte-accessibility and ionic transportation. (C) 2015 The Electrochemical Society.
Added by: Laurent Cournède |