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Numerical Study on Mass Transfer and Electrical Performances of Solid Oxide Fuel Cell With Gradient Porosity Anode

FU Pei;YANG Jian;ZENG Min;WANG Qiu-Wang;MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University;  
In the present paper, a three dimensional mathematic model of solid oxide fuel cell(SOFC)with gradient porosity anode was established to simulate mass transfer and electrical performances in the SOFC. Compared with homogeneous porosity anode SOFC, gradient porosity anode SOFC shows better mass transfer and electrical performances. Results show that gradient porosity anode design not only remains high mass transfer performance, but also effectively adjusts thermal expansion match between the electrode and electrolyte. The maximum output power density of the gradient porosity anode design in this paper could reach 1.005 W·cm~(-2), which is at least 8.78% higher than that of homogeneous porosity anode SOFC. Therefore, gradient porosity anode design can significantly improve the electrical performance of SOFC.
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