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Open AccessArticle

Inkjet Printed Y-Substituted Barium Zirconate Layers as Electrolyte Membrane for Thin Film Electrochemical Devices

Institut für Werkstoffe der Elektrotechnik 2 & JARA-FIT, RWTH Aachen University, 52074 Aachen, Germany
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Membranes 2019, 9(10), 131; https://doi.org/10.3390/membranes9100131
Received: 29 August 2019 / Revised: 30 September 2019 / Accepted: 6 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Ceramic Membranes for Fuel Cell Applications and Hydrogen Production )
In this work, the inkjet printing of proton conducting Y-substituted barium zirconate (BZY) thin films was studied. Two different kinds of precursor inks, namely a rather molecular BZY precursor solution and a BZY nanoparticle dispersion, have been synthesized and initially investigated with regard to their decomposition and phase formation behavior by thermal analysis, X-ray diffraction, and scanning electron microscopy. Their wetting behavior and rheological properties have been determined in order to evaluate their fundamental suitability for the inkjet process. Crystalline films have been already obtained at 700 °C, which is significantly lower compared to conventional solid-state synthesis. Increasing the temperature up to 1000 °C results in higher crystal quality. Permittivity measurements gave values of around 36 that are in good agreement with the literature while also proving the integrity of the materials. A modification of the as-synthesized BZY stock solution and nanoparticle dispersion by dilution with propionic acid improved the jetability of both inks and yielded homogeneous BZY coatings from both inks. In order to study the electrochemical properties of BZY films derived from the two printed inks, BZY coatings on sapphire substrates were prepared and characterized by electrochemical impedance spectroscopy. View Full-Text
Keywords: inkjet printing; chemical solution deposition; BZY; proton conductors; thin films; additive manufacturing; IT-SOFCs inkjet printing; chemical solution deposition; BZY; proton conductors; thin films; additive manufacturing; IT-SOFCs
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MDPI and ACS Style

Schneller, T.; Griesche, D. Inkjet Printed Y-Substituted Barium Zirconate Layers as Electrolyte Membrane for Thin Film Electrochemical Devices. Membranes 2019, 9, 131.

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