Zhi-yi Jiang, Chang-rong Xia, Fang-lin Chen. Efficient Thickness of Solid Oxide Fuel Cell Composite Electrode[J]. Chinese Journal of Chemical Physics , 2010, 23(2): 217-225. doi: 10.1088/1674-0068/23/02/217-225
Citation: Zhi-yi Jiang, Chang-rong Xia, Fang-lin Chen. Efficient Thickness of Solid Oxide Fuel Cell Composite Electrode[J]. Chinese Journal of Chemical Physics , 2010, 23(2): 217-225. doi: 10.1088/1674-0068/23/02/217-225

Efficient Thickness of Solid Oxide Fuel Cell Composite Electrode

doi: 10.1088/1674-0068/23/02/217-225
Funds:  This work was supported by the National Natu-ral Science Foundation of China (No.10979046 andNo.50730002) and the Ministry of Science and Tech-nology of China (No.2007AA05Z151). Fang-lin Chenwas supported as part of Science Based Nano-Structure Design and Synthesis of Heterogeneous Functional Ma-terials for Energy Systems, an Energy Frontier Research Center funded by the U.S. Department of Energy, Of-fice of Science, Office of Basic Energy Sciences (No.DE-SC0001061).
  • Received Date: 2010-01-07
  • The efficient thickness of a composite electrode for solid oxide fuel cells was directly calcu-lated by developing a physical model taking into account of the charge transfer process, the oxygen ion and electron transportation, and the microstructure characteristics of the elec-trode. The efficient thickness, which is defined as the electrode thickness corresponding to the minimum electrode polarization resistance, is formulated as a function of charge trans-fer resistivity, effective resistivity to ion and electron transport, and three-phase boundary length per unit volume. The model prediction is compared with the experimental reports to check the validity. Simulation is performed to show the effect of microstructure, intrinsic material properties, and electrode reaction mechanism on the efficient thickness. The results suggest that when an electrode is fabricated, its thickness should be controlled regarding its composition, particle size of its components, the intrinsic ionic and electronic conductivities,and its reaction mechanisms as well as the expected operation temperatures. The sensitivity of electrode polarization resistance to its thickness is also discussed.
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Efficient Thickness of Solid Oxide Fuel Cell Composite Electrode

doi: 10.1088/1674-0068/23/02/217-225
Funds:  This work was supported by the National Natu-ral Science Foundation of China (No.10979046 andNo.50730002) and the Ministry of Science and Tech-nology of China (No.2007AA05Z151). Fang-lin Chenwas supported as part of Science Based Nano-Structure Design and Synthesis of Heterogeneous Functional Ma-terials for Energy Systems, an Energy Frontier Research Center funded by the U.S. Department of Energy, Of-fice of Science, Office of Basic Energy Sciences (No.DE-SC0001061).

Abstract: The efficient thickness of a composite electrode for solid oxide fuel cells was directly calcu-lated by developing a physical model taking into account of the charge transfer process, the oxygen ion and electron transportation, and the microstructure characteristics of the elec-trode. The efficient thickness, which is defined as the electrode thickness corresponding to the minimum electrode polarization resistance, is formulated as a function of charge trans-fer resistivity, effective resistivity to ion and electron transport, and three-phase boundary length per unit volume. The model prediction is compared with the experimental reports to check the validity. Simulation is performed to show the effect of microstructure, intrinsic material properties, and electrode reaction mechanism on the efficient thickness. The results suggest that when an electrode is fabricated, its thickness should be controlled regarding its composition, particle size of its components, the intrinsic ionic and electronic conductivities,and its reaction mechanisms as well as the expected operation temperatures. The sensitivity of electrode polarization resistance to its thickness is also discussed.

Zhi-yi Jiang, Chang-rong Xia, Fang-lin Chen. Efficient Thickness of Solid Oxide Fuel Cell Composite Electrode[J]. Chinese Journal of Chemical Physics , 2010, 23(2): 217-225. doi: 10.1088/1674-0068/23/02/217-225
Citation: Zhi-yi Jiang, Chang-rong Xia, Fang-lin Chen. Efficient Thickness of Solid Oxide Fuel Cell Composite Electrode[J]. Chinese Journal of Chemical Physics , 2010, 23(2): 217-225. doi: 10.1088/1674-0068/23/02/217-225

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