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- W2883707929 abstract "Intermediate temperature (IT) fuel cells using mixed conducting materials have been reported by many researchers by adopting different compositions, microstructures, manufacture processes and testing conditions. Most iop-Vop relationships of these button electrochemical devices are experimentally achieved based on anode or cathode surface area (i.e., Aan≠Aca). In this paper, a 3D multi-physics model for a typical IT solid oxide fuel cell (SOFC) that carefully considers detail electrochemical reaction, electric leakage, and e−, ion and gas transporting coupling processes has been developed and verified to study the effect of Aca/Aan on button cell iop-Vop performance. The result shows that the over zone of the larger electrode can enhance charges and gas transport capacities within a limited scale of only 0.03 cm. The over electrode zone exceed this width would be inactive. Thus, the active zone of button fuel cell is restricted within the smaller electrode area min(Aan, Aca) due to the relative large disc radius and thin component layer. For a specified Vop, evaluating the responded iop by dividing output current Iop with min(Aan, Aca) for a larger value is reasonable to present real performance in the current device scale of cm. However, while the geometry of button cells or other electrochemical devices approach the scale less than 100 μm, the effect of over electrode zone on electrochemical performance should not be ignored." @default.
- W2883707929 created "2018-08-03" @default.
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- W2883707929 date "2018-07-18" @default.
- W2883707929 modified "2023-10-17" @default.
- W2883707929 title "The Geometry Effect of Cathode/Anode Areas Ratio on Electrochemical Performance of Button Fuel Cell Using Mixed Conducting Materials" @default.
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- W2883707929 doi "https://doi.org/10.3390/en11071875" @default.
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