Fabrication of microstructured yttria-stabilized zirconia electrolyte surface using centrifugal molding for high-performance solid oxide fuel cells. Issue 1 (2022)

• Record Type: Journal Article
• Authors: Nagato, Keisuke; Nagai, Kohei; Okamura, Toshihide; Tomizawa, Morio
• Is Part Of: CIRP annals. Volume 71:Issue 1(2022)
• Page Start: 477
• Page End: 480
• Publication Date: 2022
• Subjects: Ceramic -- Fuel cell -- Microstructure -- Molding; Production engineering -- Research -- Periodicals; 670.5
• DOI: 10.1016/j.cirp.2022.04.070
• Languages: English
• ISSNs: 0007-8506

Abstract

Abstract: This study replicated the surface of yttria-stabilized zirconia (YSZ) microstructures by centrifugal filling to improve the performance of solid oxide fuel cells. A slurry with YSZ nanoparticles were filled with centrifugal force in polymer replica mold, solvent dried, and then transferred and sintered onto a bulk YSZ electrolyte plate. 3 m-pitch pillar structure was successfully replicated with a centrifugal acceleration of 2, 500 G, and the polarization resistance of the electrodes was reduced by approximately 25%. Similarly, a line-and-space structure was formed to investigate the structure dependence, and resistance reduction was confirmed. Furthermore, a distribution relaxation time analysis confirmed that the reduction in resistance was due to decreasing tortuosity factor of YSZ.