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Achour, A., Ducros, J. B., Porto, R. L., Boujtita, M., Gautron, E., Le Brizoual, L., Djouadi, M. A. & Brousse, T. (2014) Hierarchical nanocomposite electrodes based on titanium nitride and carbon nanotubes for micro-supercapacitors. Nano Energy, 7 104–113.
Added by: Laurent Cournède (2016-03-10 21:01:55) |
| Type de référence: Article DOI: 10.1016/j.nanoen.2014.04.008 Numéro d'identification (ISBN etc.): 2211-2855 Clé BibTeX: Achour2014a Voir tous les détails bibliographiques  |
Catégories: ID2M Mots-clés: carbon nanotubes, energy-storage, fabrication, hydrous ruo2, nanorods, nanostructure, oxide-films, Oxygen vacancies, performance electrochemical capacitors, raman-scattering, Super-capacitors, Surface chemistry, thin-film supercapacitors, tio2, Titanium nitride Créateurs: Achour, Boujtita, Brousse, Djouadi, Ducros, Gautron, Le Brizoual, Porto Collection: Nano Energy |
Consultations : 1/1025
Indice de consultation : 7% Indice de popularité : 1.75% |
| Résumé |
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Electrochemical capacitors that can store high density of electrical energy with fast power delivering and long operating life time are important for many challenging applications. Tremendous research efforts aim at developing electrodes which gather the advantages of both electrochemical double layer capacitors (high power density, long cycling life) and pseudo-capacitors (high energy density). Here we highlight the design of hierarchically composite electrodes consisting of porous and nanostructured TiN grown on vertically aligned CNTs as high-performance electrode for micro-supercapacitors. The electrodes, which are deposited on silicon substrates, exhibit an areal capacitance as high as 18.3 mF cm(-2) at 1 Vs(-1) that can be further enhanced by increasing the TiN layer thickness. Furthermore, this capacitance is maintained over 20,000 cycles. We propose that such high performance originates from the high surface area of the electrodes having a nanoporous structure, as well as to their specific surface chemistry, which contains large amount of oxygen vacancies as a result of nitrogen self-doping of anatase which forms at the TiN surface. (C) 2014 Elsevier Ltd. All rights reserved.
Added by: Laurent Cournède |