Titanium vanadium nitride electrode for micro-supercapacitors

A. Achour (1) , R. Lucio-Porto (2) , M. Chaker (1) , A. Arman (3) , A. Ahmadpourian (3) , M.A. Soussou (4) , M. Boujtita (5) , L. Le Brizoual (6) , M.A. Djouadi (7) , T. Brousse (7, 8)

1 INRS - Institut National de la Recherche Scientifique [Québec]
2 Facultad de Ingeniería Mecánica y Eléctrica
3 Department of Physics
4 CRTEn - Centre de Recherches et des Technologies de l'Energie
5 CEISAM - Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation
6 IETR - Institut d'Électronique et des Technologies du numéRique
7 IMN - Institut des Matériaux Jean Rouxel
8 RS2E - Réseau sur le stockage électrochimique de l'énergie

Here we report on the synthesis of binary transition metal nitride electrodes based on titanium vanadium nitride (TiVN) thin films. These films were deposited by a method compatible with micro-electronic processes which consists of DC co-sputtering of vanadium (V) and titanium (Ti) targets. TiVN films with different Ti/V ratio were deposited. A dependence of the capacitance and the cycling stability with the Ti/V atomic ratio in the films was established. While V rich sample exhibits a Faradic behavior that limits its cycling ability despite a high areal and volumetric capacity, the addition of Ti in the film drastically improves the cycling ability with virtually no fade in capacitance after 10,000 cycles. Furthermore, a 1.1 Ti/V ratio leads to an areal capacitance up to 15 mF·cm− 2 in 1 M KOH electrolyte solution. Such electrodes shed light on the use of binary transition metal nitrides as candidate electrodes for micro-supercapacitor.

Mots clés: Electrolyte solutions; Cosputtering; Cycling stability; Bins; Capacitance; Electrodes; Electrolytes; Nitrides; Refractory metal compounds; Supercapacitor; Thin films; Titanium; Transition metals; Atomic ratio; Micro supercapacitors; Transition metal nitrides; Vanadium nitrides; Volumetric capacity; Titanium nitride

Domaines: Matériaux; Energie électrique

A. Achour, R. Lucio-Porto, M. Chaker, A. Arman, A. Ahmadpourian, et al.. Titanium vanadium nitride electrode for micro-supercapacitors. Electrochemistry Communications, 2017, 77, pp.40-43. ⟨10.1016/j.elecom.2017.02.011⟩. ⟨hal-01484528⟩