Ding, Cheng Seo, Haewon Kishimoto, Masashi Iwai, Hiroshi 2024-01-19T09:30:47Z 2024-01-19T09:30:47Z 2023-07-13 2023-06 1615-6846 https://pubs.kist.re.kr/handle/201004/113644 A temperature-controlled microextrusion printing technique is proposed to realize the increased aspect ratio of mesoscale convex structures at the anode-electrolyte interface in solid oxide fuel cells (SOFCs). The rheological properties of the anode ink for microextrusion printing are experimentally measured at various temperatures, and it is found that the viscosity of the ink and the wettability of the ink to the anode substrate decrease at lower temperatures, which is desirable for the ink to retain its shape on the substrate. The anode-supported SOFC button cells are fabricated by microextrusion printing with and without temperature control and compared in terms of their interfacial structures and electrochemical performance. The aspect ratio of the interfacial structure is increased from 0.16 to 0.28 by lowering the ink temperature, resulting in a higher interface enlargement of 25%. Owing to the enlarged interfacial area, enhanced cell performance is also achieved. English John Wiley & Sons Ltd. Temperature-controlled microextrusion printing for mesoscale interfacial designing in solid oxide fuel cells Article 10.1002/fuce.202200170 1 Fuel Cells, v.23, no.3, pp.264 - 272 Fuel Cells 23 3 264 272 N scie scopus 001016644600001 2-s2.0-85162912824 Electrochemistry Energy & Fuels Electrochemistry Energy & Fuels Article ELECTRODE-ELECTROLYTE INTERFACE ACTIVE THICKNESS VISCOSITY PERFORMANCE SOFC ANODES ION electrode-electrolyte interface microextrusion printing powder suspension rheology shape retention solid oxide fuel cell temperature