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Martínez, J. A. Z., Náñez, S. E. G., Calvez, E. L., Porto, R. L., Cortez, I. E. M., Brousse, T. & Pavón, L. A. L. (2021) Layered Vanadium Phosphates as Electrodes for Electrochemical Capacitors Part I: The Case of VOPO4 center dot 2H(2)O. J. Electrochem. Soc. 168 070531.
Added by: Richard Baschera (2021-07-29 08:08:14) Last edited by: Richard Baschera (2021-07-29 08:10:47) |
| Type de référence: Article DOI: 10.1149/1945-7111/ac11a3 Numéro d'identification (ISBN etc.): 1945-7111 Clé BibTeX: Martnez2021 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, ST2E Créateurs: Brousse, Calvez, Cortez, Martínez, Náñez, Pavón, Porto Collection: J. Electrochem. Soc. |
Consultations : 1/400
Indice de consultation : 8% Indice de popularité : 2% |
| Liens URLs https://doi.org/10.1149/1945-7111/ac11a3 |
| Résumé |
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VOPO4·2H2O was synthesized and investigated as an electrode material for electrochemical supercapacitors. The electrochemical characterizations were performed in three different electrolytes (3M LiNO3, 3M KOH and 3M LiOH). Ion intercalation is shown by extracting the charge of the double layer, pseudocapacitive and faradaic processes from cyclic voltammograms. This takes place across the entire applied potential window even at scan rates as high as 100 mV.s−1. However, the amount of charge related to each mechanism depends on the nature of the electrolyte. The highest areal capacitance is 500 μF cm−2 (70 Fg−1) in 3M LiOH. Moreover, after an initial fade the capacitance stabilizes at 90% of the starting value after 5000 cycles, thus opening a new use of transition metal phosphates as electrodes for energy storage devices.
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Publisher: The Electrochemical Society
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