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Jrondi, A., Buvat, G., De La Pena, F., Marinova, M., Huve, M., Brousse, T., Roussel, P. & Lethien, C. (2023) Major Improvement in the Cycling Ability of Pseudocapacitive Vanadium Nitride Films for Micro-Supercapacitor. Advanced Energy Materials, 13 2203462. 
Added by: Richard Baschera (2023-03-02 14:07:38)   Last edited by: Richard Baschera (2023-05-19 08:18:23)
Type de référence: Article
DOI: 10.1002/aenm.202203462
Numéro d'identification (ISBN etc.): 1614-6832
Clé BibTeX: Jrondi2023
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Catégories: ST2E
Créateurs: Brousse, Buvat, De La Pena, Huve, Jrondi, Lethien, Marinova, Roussel
Collection: Advanced Energy Materials
Consultations : 1/244
Indice de consultation : 11%
Indice de popularité : 2.75%
Vanadium nitride film made using a thin film deposition technique is a promising electrode material for micro-supercapacitor applications owing to its high electrical conductivity and high volumetric and surface capacitance values in aqueous electrolyte. Nevertheless, the cycling stability has to be improved to deliver good capacitance during a large number of cycles. Here, it is shown that vanadium nitride films made by a magnetron sputtering deposition method exhibit remarkable cycling stability (high capacitance retention value after 150 000 cycles), ultra-high rate capability (75% of the initial capacitance at 1.6 V s(-1)), while providing high surface capacitance values (approximate to 1.4 F cm(-2)) and very low ageing of the VN electrodes (no loss of performance after 13 months). Additionally, new findings regarding the location of vanadium oxides species responsible for the charge storage mechanism in pseudocapacitive VN films are revealed by transmission electron microscopy electron energy-loss spectroscopy analyses at the nanoscale.
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