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Chemcial Industry and Engineering 2017, Vol. 34 Issue (4) :69-74    DOI: 10.13353/j.issn.1004.9533.20151073
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Simulating the Ionic Conduction of Doped Ceria-CarbonateComposite Electrolyte via a Random Resistor Network Model
Yuan Chaowei, Zhang Wen, Wang Yuxin
School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science & Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, China

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Abstract 

For the first time, the structure of doped ceria-carbonate composite electrolytes in solid oxide fuel cells is modeled by a two phase random lattice, which is then converted into a random resistor network to calculate the ionic conductivity of the composite electrolytes. The dependence of O2- and H+ conductivities on the volume fraction of carbonate, the grain size of doped ceria and temperature is simulated. The simulation results are compared with the experimentally obtained conductivities of samarium doped ceria-carbonate composite electrolytes. The simulation and experimental results are found to be in good agreement.

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Articles by authors
Yuan Chaowei
Zhang Wen
Wang Yuxin
Keywordsdoped ceria;   carbonate;   composite electrolyte;   ionic conductivity;   random resistor network     
Received 2015-04-29;
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Yuan Chaowei, Zhang Wen, Wang Yuxin.Simulating the Ionic Conduction of Doped Ceria-CarbonateComposite Electrolyte via a Random Resistor Network Model[J]  Chemcial Industry and Engineering, 2017,V34(4): 69-74
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