Performance Investigation on Mono-Block-Layer Build Type Solid Oxide Fuel Cells with a Vertical Rib Design

Siyu Lu, Man Zhang, Jie Wu and Wei Kong
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Siyu Lu: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Man Zhang: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Jie Wu: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Wei Kong: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China

Energies, 2022, vol. 15, issue 3, 1-12

Abstract: Compared with planar-type solid oxide fuel cells (SOFCs), mono-block-layer build (MOLB)-type SOFCs have additional three-phase boundaries per unit volume, and their performance is severely limited by their longer current path. To resolve this issue, a vertical rib design, which was evaluated using a numerical method, was proposed. Compared with the conventional design, the power density for the vertical rib design increased by 12.32%. This is because the vertical rib design provides another short path for current, which not only reduces the ohmic loss in the cathode, but also decreases the ohmic polarization caused by the contact resistance. However, the vertical rib design hinders the transport of oxygen in the cathode and increases the concentration loss. Therefore, the vertical rib size design is crucial. Based on the influence of the vertical rib width, the vertical rib widths on the cathode and anode sides of 0.7 and 1 mm are recommended for different contact resistances, respectively.

Keywords: solid oxide fuel cell; interconnector; vertical rib design; oxygen transfer; ohmic loss (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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