Optimization Design of Rib Width and Performance Analysis of Solid Oxide Electrolysis Cell

Meiting Guo, Xiao Ru, Zijing Lin, Guoping Xiao and Jianqiang Wang
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Meiting Guo: Department of Physics, University of Science and Technology of China, No. 96, JinZhai Road, Hefei 230026, China
Xiao Ru: Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, No. 96, JinZhai Road, Hefei 230026, China
Zijing Lin: Department of Physics, University of Science and Technology of China, No. 96, JinZhai Road, Hefei 230026, China
Guoping Xiao: Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
Jianqiang Wang: Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

Energies, 2020, vol. 13, issue 20, 1-18

Abstract: Structure design is of great value for the performance improvement of solid oxide electrolysis cells (SOECs) to diminish the gap between scientific research and industrial application. A comprehensive multi-physics coupled model is constructed to conduct parameter sensitivity analysis to reveal the primary and secondary factors on the SOEC performance and optimal rib width. It is found that the parameters of the O 2 electrode have almost no influence on the optimal rib width at the H 2 electrode side and vice versa. The optimized rib width is not sensitive to the electrode porosity, thickness, electrical conductivity and gas composition. The optimal rib width at the H 2 electrode side is sensitive to the contact resistance at the interface between the electrode and interconnect rib, while the extremely small concentration loss at the O 2 electrode leads to the insensitivity of optimal rib width to the parameters influencing the O 2 diffusion. In addition to the contact resistance, the applied cell voltage and pitch width also has a dramatic influence on the optimal rib width of the fuel electrode. An analytical expression considering the influence of total cell polarization loss, the pitch width and the contact resistance is further developed for the benefit of the engineering society. The maximum error in the cell performance between the numerically obtained and analytically acquired optimal rib width is only 0.14% and the predictive power of the analytical formula is fully verified.

Keywords: solid oxide electrolysis cell; multi-physics; optimal rib/pitch ratio; parameters sensitivity; analytical expression (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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