Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/86297
Title: Numerical study on electrochemical performance of low-temperature micro-solid oxide fuel cells with submicron platinum electrodes
Authors: Yoon, Yong-Jin
Su, Pei-Chen
Park, Jee Min
Kim, Dae Yun
Baek, Jong Dae
Lee, Seong Hyuk
Keywords: Low-temperature Micro-solid Oxide Fuel Cell (LT µ-SOFC)
Computational Fluid Dynamics (CFD)
Issue Date: 2018
Source: Park, J. M., Kim, D. Y., Baek, J. D., Yoon, Y.-J., Su, P.-C., & Lee, S. H. (2018). Numerical study on electrochemical performance of low-temperature micro-solid oxide fuel cells with submicron platinum electrodes. Energies, 11(5), 1204-.
Series/Report no.: Energies
Abstract: The present study established the two-dimensional axisymmetric model for a freestanding circular cell of the low-temperature micro-solid oxide fuel cell (µ-SOFC) that is composed of platinum (Pt) electrodes and a yttria-stabilized zirconia (YSZ) electrolyte. The only membrane electrode assembly (MEA) was constructed for the numerical simulation in order to avoid the meshing problem with a very high aspect ratio of the submicron layers. We considered the charge and species conservation equations and electrode kinetics to elucidate the intricate phenomena inside the µ-SOFC. The extensive numerical simulations were carried out by using the commercial code to predict the effect of operating temperature and electrolyte thickness on the electrochemical performance of µ-SOFC. Our numerical model was calibrated with the results from experiments, and we provided the average cell current density and overpotentials with respect to the electrolyte thickness and the operating temperature. It was found that the electrochemical performance increased with the increase in operating temperature, owing to both rapid electrochemical reactions and ionic conduction, even in µ-SOFC. Moreover, the major voltage loss of µ-SOFC at low-temperature was caused by the cathodic activation overpotential.
URI: https://hdl.handle.net/10356/86297
http://hdl.handle.net/10220/45233
ISSN: 1996-1073
DOI: http://dx.doi.org/10.3390/en11051204
Rights: © 2018 by The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
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