FONDARD, Jérémie; BILLARD, Alain; BERTRAND, Ghislaine; FOURCADE, Sébastien; BATOCCHI, Pierre; MAUVY, Fabrice; BRIOIS, Pascal

doi:10.1016/j.surfcoat.2015.11.053

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FONDARD, Jérémie
Laboratoire d'Études et de Recherches sur les Matériaux, les Procédés et les Surfaces [IRTES - LERMPS]
Fuel Cell LAB : Vers des Systèmes Pile à Combustible Efficients [FCLAB]

BILLARD, Alain
Laboratoire d'Études et de Recherches sur les Matériaux, les Procédés et les Surfaces [IRTES - LERMPS]
Fuel Cell LAB : Vers des Systèmes Pile à Combustible Efficients [FCLAB]

BERTRAND, Ghislaine
Centre interuniversitaire de recherche et d'ingénierie des matériaux [CIRIMAT]

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Surface and Coatings Technology. 2016-06-15, vol. 295, p. 29-36

Elsevier

Résumé en anglais

This work focuses on the structural, microstructural, electrical and electrochemical characterization of La–Ni–O coatings deposited by reactive magnetron sputtering under different argon partial pressures. Deposition was driven by Plasma Emission Monitoring system (PEM) which allows high deposition rate. For each pressure, the optimal regulation setpoint for lanthanum oxide deposition is determined and then the current dissipated on the nickel target is adjusted to obtain the convenient La/Ni ratio to achieve the K2NiF4 structure. After an appropriate annealing treatment, coatings crystallize in the desired structure with more or less impurities. Increasing the device's pressure from 0.4 to 4.8Pa produces more porous samples with different microstructures. Then, a coating with porosity gradient was built by using these four different total pressures. Its electrical performances were tested and allowed its utilization as cathode layer in intermediate temperature-solid oxide fuel cell (IT-SOFC). This modified architecture cathode allows better performances (71mW·cm−2) than dense cathode produced by the same technique (51mW·cm−2).< Réduire

Mots clés en anglais

La2NiO4

Reactive magnetron sputtering

Effect of total pressure

Intermediate-temperature solid oxide fuel cell

Complete cell tests

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Effect of total pressure on La 2 NiO 4 coatings deposited by reactive magnetron sputtering using plasma emission monitoring

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