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Research Papers

Microstructure Optimization Designs for Anode-Supported Planar Solid Oxide Fuel Cells

[+] Author and Article Information
Junxiang Shi

Department of Mechanical Engineering,  University of South Carolina, Columbia, SC 29208

Xingjian Xue1

Department of Mechanical Engineering,  University of South Carolina, Columbia, SC 29208xue@cec.sc.edu

1

Corresponding author.

J. Fuel Cell Sci. Technol 8(6), 061006 (Sep 26, 2011) (8 pages) doi:10.1115/1.4004642 History: Received October 20, 2010; Revised July 01, 2011; Published September 26, 2011; Online September 26, 2011

Suitable porous electrode design may play a significant role in the performance enhancement of solid oxide fuel cells (SOFCs). In this paper a genetic algorithm optimization method is employed to design electrodes based on a 2D planar SOFC model development. The objective is to find suitable porosities and particle sizes distributions for both anode and cathode electrodes so that the cell performance can be maximized. The results indicate that the optimized heterogeneous morphology may better improve SOFC performance than the homogeneous counterpart, particularly under relatively high current density conditions. The optimization results are dependent on the operating conditions. The effects of inlet mass flow rates and fuel compositions are investigated. The proposed approach provides a systematical method for electrode microstructure designs of high performance SOFCs.

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Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Two-dimensional schematic illustration of a planar SOFC

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Figure 2

Comparisons between simulation results and experimental data [15]

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Figure 3

Flow diagram of genetic algorithm

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Figure 4

Optimized cell performances with different operating conditions

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Figure 5

Optimized porosities and particle sizes distributions corresponding to third row in Table 4, and 4

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Figure 6

Hydrogen and oxygen molar fraction distributions under the operating conditions with xH2(0.75):xH2O(0.25), mca,in/man,in = 2200/390 and the cell voltage of 0.4 V

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