Monolithic electrolyte-supported solid oxide fuel cells fabricated by gel-casting on 3D-printed moulds
A new approach for fabricating monolithic electrolyte-supported Solid Oxide Fuel Cells based on gel-casting technique on 3D-printed moulds is proposed to enhance their electrochemical and mechanical performances. Conventional planar and honeycomb configurations of 8¿mol% yttria-stabilized-zirconia (...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/439880 |
| Acceso en línea: | https://hdl.handle.net/2117/439880 https://dx.doi.org/10.1016/j.jeurceramsoc.2025.117379 |
| Access Level: | acceso abierto |
| Palabra clave: | Solid oxide fuel cells Electrolyte Yttria-stabilized zirconia Gel-casting 3D printing Àrees temàtiques de la UPC::Enginyeria dels materials::Materials ceràmics |
| Sumario: | A new approach for fabricating monolithic electrolyte-supported Solid Oxide Fuel Cells based on gel-casting technique on 3D-printed moulds is proposed to enhance their electrochemical and mechanical performances. Conventional planar and honeycomb configurations of 8¿mol% yttria-stabilized-zirconia (YSZ) electrolytes were gel-casted. Proper aqueous ink formulations of YSZ and agarose gelling agent were prepared, and moulds made of polylactic acid filament were fabricated by 3D-printing. The mechanical behaviour of gel-casted ceramics was compared with cold-isostatic-pressed ones, using ball-on-3-balls bending strength and nanoindentation tests. Complementarily, the effect of electrolyte geometry on the mechanical stress distribution was investigated by finite element simulation. Finally, complete fuel cells were fabricated and electrochemically characterized, using Ni-YSZ anode and lanthanum-strontium-manganite-YSZ cathode. Electrochemical performance of the honeycomb cell (227¿mW·cm-2 at 900°C) was significantly higher than the planar one (189¿mW·cm-2 at 900°C). The electrochemical and mechanical properties of gel-casted electrolytes, close to state-of-the-art ones, validate this new approach. |
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