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

Energies

Man Zhang¹  Siyu Lu¹  Jie Wu¹  Wei Kong¹ 

[1] School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China;

关键词: solid oxide fuel cell;    interconnector;    vertical rib design;    oxygen transfer;    ohmic loss;   

DOI  :  10.3390/en15030979

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown