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Fast Electrochemical Storage Process in Sputtered Nb2O5 Porous Thin Films

Arico, Cassandra and Ouendi, Saliha and Taberna, Pierre-Louis and Roussel, Pascal and Simon, Patrice and Lethien, Christophe Fast Electrochemical Storage Process in Sputtered Nb2O5 Porous Thin Films. (2019) ACS Nano, 13 (5). 5826-5832. ISSN 1936-0851

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Official URL: https://doi.org/10.1021/acsnano.9b01457

Abstract

The formation of a thin film electrode exhibiting high capacity and high rate capabilities is challenging in the field of miniaturized electrochemical energy storage. Here, we present an elegant strategy to tune the morphology and the properties of sputtered porous Nb2O5 thin films deposited on Si-based substrates via the magnetron sputtering deposition technique. Kinetic analysis of the redox reactions is studied to qualify the charge storage process, where we observe a non-diffusion-controlled mechanism within the porous niobium pentoxide thin film. To improve the surface capacity of the Nb2O5 porous electrode, the thickness is progressively increased up to 0.94 μm, providing a surface capacity close to 60 μAh·cm–2 at 1 mV·s–1. The fabrication of high energy density miniaturized power sources based on the optimized T-Nb2O5 films could be achieved for Internet of Things applications requiring high rate capability.

Item Type:Article
HAL Id:hal-02263481
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Collège de France (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Lille - ENSCL (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Other partners > Institut catholique de Lille - ICL (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > Sorbonne Université (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Nantes (FRANCE)
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > Yncrea Hauts de France (FRANCE)
Other partners > Ecole Centrale de Lille (FRANCE)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
Other partners > Université d'Artois (FRANCE)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Other partners > Université de Lille (FRANCE)
Other partners > Université de Montpellier (FRANCE)
Other partners > Université de Valenciennes et du Hainaut-Cambrésis - UVHC (FRANCE)
Laboratory name:
Funders:
Agence Nationale de la Recherche - ANR - Ministère de l’Enseignement Supe�rieur et de la Recherche, Re�gion Hauts de France and FEDER
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Deposited By: Yves MOMBOISSE
Deposited On:12 Nov 2019 13:45

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