Equivalent Circuit Model for the Electrochemical Reaction Process within the Solid Oxide Fuel Cell Composite Electrode

2013 ◽  
Vol 662 ◽  
pp. 266-272 ◽  
Author(s):  
Dai Fen Chen ◽  
Qi Ce Zeng ◽  
Huan Huan He ◽  
Liang Wei ◽  
Zi Dong Yu

As the fabrication technology of the composite electrode becomes sophisticated, the understanding of the detailed knowledge of the microstructure’s effect on the electrochemical process is essential for the commercializing of the solid oxide fuel cell (SOFC). In this paper, an equivalent circuit for the SOFC structure is proposed to clearly describe the electronic electric current transfer process, ionic electric current transfer process and the charge transfer process at the electrochemical reaction interface between electronic and ionic conducting materials. And types of the boundary condition setting constraints for the developing of the multi-physics coupling numerical model of SOFC are obtained basing on the electrochemical kinetic analysis.

2015 ◽  
Vol 68 (1) ◽  
pp. 2831-2843
Author(s):  
M. Kinoshita ◽  
K. Tomomichi ◽  
S. Yamagami ◽  
Y. Yamada ◽  
T. Terai ◽  
...  

2009 ◽  
Vol 11 (7) ◽  
pp. 1381-1384 ◽  
Author(s):  
Chun-Hsiu Wang ◽  
Maw-Chwain Lee ◽  
Ta-Jen Huang ◽  
Yang-Chuang Chang ◽  
Wei-Xin Kao ◽  
...  

Author(s):  
Masayuki Suzuki ◽  
Naoki Shikazono ◽  
Koji Fukagata ◽  
Nobuhide Kasagi

Three-dimensional heat and mass transfer and electrochemical reaction in an anode-supported flat-tube solid oxide fuel cell (FT-SOFC) are studied. Transport and reaction phenomena mainly change in the streamwise direction. Exceptionally, hydrogen and water vapor have large concentration gradients also in the cross section perpendicular to the flow direction, because of the insufficient mass diffusion in the porous anode. Based on these results, we develop a simplified one-dimensional cell model. The distributions of temperature, current, and overpotential predicted by this model show good agreement with those obtained by the full three-dimensional simulation. We also investigate the effects of pore size, porosity and configuration of the anode on the cell performance. Extensive parametric studies reveal that, for a fixed three-phase boundary (TPB) length, rough material grains are preferable to obtain higher output voltage. In addition, when the cell has a thin anode with narrow ribs, drastic increase in the volumetric power density can be achieved with small voltage drop.


2015 ◽  
Vol 68 (1) ◽  
pp. 2819-2829
Author(s):  
K. Tomomichi ◽  
M. Kinoshita ◽  
S. Yamagami ◽  
Y. Yamada ◽  
T. Terai ◽  
...  

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