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• W2069915541 abstract "The effects of various current collectors on the electrochemical property measurements of a Ni–YSZ cermet have been investigated. Electrochemical characteristics were determined by impedance spectroscopy (IS) at open-circuit voltage in H2–H2O atmosphere at 800°C using a symmetrical cell. We selected various current collectors made of gold, platinum and nickel and with two different structures, paste and mesh. When using paste, the electrochemical response, recorded with the same Ni–YSZ cermet sample, depends greatly on the nature of the current collector. Polarization resistance values follow the order: Ni<Pt<Au. This is the same order as reported in the literature for the hydrogen electrochemical oxidation activities of these metals. This demonstrates that paste current collectors interfere with the electrochemical properties of the anode material. Therefore, in order to compare the electrochemical activities of various anode materials, the same current collector has to be used. We have also observed that the polarization resistance increases with time, due to metal particle diffusion through the Ni–YSZ cermet. When using a nickel mesh, the electrochemical properties do not vary with time. Moreover, the structure of this current collector is most similar to the interconnect materials, which are the current collectors in planar SOFCs. It is, therefore, the best current collector for the study of the electrochemical properties of Ni–YSZ cermet." @default.
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• W2069915541 date "2000-01-01" @default.
• W2069915541 modified "2023-10-12" @default.
• W2069915541 title "Electrochemical properties of Ni–YSZ cermet in solid oxide fuel cells Effect of current collecting" @default.
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• W2069915541 doi "https://doi.org/10.1016/s0167-2738(99)00254-4" @default.
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