Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6947
Title: Mathematical analysis of SOFC based on co-ionic conducting electrolyte
Authors: Zheng, K
Ni, M 
Sun, Q
Shen, LY
Keywords: Co-ionic electrolyte
Proton transport number
Concentration overpotential
Mass transport
Model
Issue Date: Jun-2013
Publisher: Springer
Source: Acta mechanica Sinica, June 2013, v. 29, no. 3, p. 388-394 How to cite?
Journal: Acta mechanica Sinica 
Abstract: In co-ionic conducting solid oxide fuel cell (SOFC), both oxygen ion (O²⁻) and proton (H⁺) can transport through the electrolyte, generating steam in both the anode and cathode. Thus the mass transport phenomenon in the electrodes is quite different from that in conventional SOFC with oxygen ion conducting electrolyte (O-SOFC) or with proton conducting electrolyte (H-SOFC). The generation of steam in both electrodes also affects the concentration overpotential loss and further the SOFC performance. However, no detailed modeling study on SOFCs with co-ionic electrolyte has been reported yet. In this paper, a new mathematical model for SOFC based on co-ionic electrolyte was developed to predict its actual performance considering three major kinds of overpotentials. Ohm’s law and the Butler-Volmer formula were used to model the ion conduction and electrochemical reactions, respectively. The dusty gas model (DGM) was employed to simulate the mass transport processes in the porous electrodes. Parametric simulations were performed to investigate the effects of proton transfer number (t[sub H]) and current density (j[sub total]) on the cell performance. It is interesting to find that the co-ionic conducting SOFC could perform better than O-SOFC and H-SOFC by choosing an appropriate proton transfer number. In addition, the co-ionic SOFC shows smaller difference between the anode and cathode concentration overpotentials than O-SOFC and H-SOFC at certain t[sub H] values. The results could help material selection for enhancing SOFC performance.
URI: http://hdl.handle.net/10397/6947
ISSN: 0567-7718
EISSN: 1614-3116
DOI: 10.1007/s10409-013-0040-3
Rights: ©The Chinese Society of Theoretical and Applied Mechanics and Springer-Verlag Berlin Heidelberg 2013
The following article “Zheng, K. -., Ni, M., Sun, Q., & Shen, L. -. (2013). Mathematical analysis of SOFC based on co-ionic conducting electrolyte. Acta Mechanica Sinica/Lixue Xuebao, 29(3), 388-394.” is located at http://dx.doi.org/10.1007/s10409-013-0040-3. The final publication is available at http://www.springerlink.com."
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