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3-D inkjet printed solid oxide electrochemical reactors III. cylindrical pillared electrode microstructures
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1-s2.0-S0013468622009938-main.pdf | Published version | 10.43 MB | Adobe PDF | View/Open |
Title: | 3-D inkjet printed solid oxide electrochemical reactors III. cylindrical pillared electrode microstructures |
Authors: | Farandos, NM Jang, I Alexander, JC Kelsall, GH |
Item Type: | Journal Article |
Abstract: | Inkjet printing is a scalable technique that can fabricate customised three-dimensional microstructures, reproducibly, accurately, and with high material utilisation, by printing multiple layers sequentially onto previously printed layers, to produce architectures tailored in this case to electrochemical reactors. Printable yttria-stabilised zirconia (YSZ) and lanthanum strontium manganite (LSM) inks were formulated to enable fabrication of solid oxide electrochemical reactors (SOERs): H2O-H2 | Ni(O)-YSZ | YSZ | YSZ pillars | LSM | O2. Of the geometries studied, equi-sized, hexagonally-arranged cylindrical pillars were predicted to produce the largest ratio of interfacial to geometric (cross-sectional) areas. However, this neglects effects of potential and current density distributions that constrain up-scaling to more modest factors. Hence, using kinetic parameter values from the literature, finite element computational simulations of the pillared SOER in (H2 - O2) fuel cell mode predicted peak power densities of 0.11 W cm−2 at 800 °C, whereas its counterpart with only a planar electrolyte layer produced only 0.05 W cm−2; i.e. the pillars were predicted to enhance peak power densities by ca. 2.3. Arrays of several thousand YSZ cylindrical pillars were printed, with post-sintering diameter, height, and spacing of 25, 95 and 63 μm, respectively. LSM was inkjet-printed onto the pillars, and sintered subsequently, to produce contiguous films ca. 4 μm thick. In (H2 - O2) fuel cell mode at 725, 770, and 795 °C, these reactors produced peak power densities of 0.09, 0.21, 0.30 W cm−2, respectively, 3–6 times greater than the performance of ‘benchmark’ Ni(O)-YSZ | YSZ | LSM reactors inkjet-printed with planar cathodes operating under the same conditions, thereby demonstrating the benefit of inkjet printing as a fabrication technique for SOERs. |
Issue Date: | 10-Sep-2022 |
Date of Acceptance: | 9-Jul-2022 |
URI: | http://hdl.handle.net/10044/1/99218 |
DOI: | 10.1016/j.electacta.2022.140834 |
ISSN: | 0013-4686 |
Publisher: | Elsevier BV |
Start Page: | 1 |
End Page: | 10 |
Journal / Book Title: | Electrochimica Acta |
Volume: | 426 |
Copyright Statement: | © 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
Sponsor/Funder: | Shell Global Solutions International BV |
Funder's Grant Number: | 4550155742 |
Keywords: | 02 Physical Sciences 03 Chemical Sciences 09 Engineering Energy |
Publication Status: | Published |
Article Number: | 140834 |
Online Publication Date: | 2022-07-12 |
Appears in Collections: | Chemical Engineering |
This item is licensed under a Creative Commons License