2021
DOI: 10.1016/j.electacta.2021.138765
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Electrode kinetics of porous Ni-3YSZ cermet operated in fuel cell and electrolysis modes for solid oxide cell application

Abstract: The electrochemical reactions of hydrogen oxidation and steam reduction have been investigated for a porous cermet electrode made of Ni and 3YSZ. The electrochemical characterizations have been performed over a large range of gas compositions at 700°C. It has been shown that the fuel electrode response is activated by the potential under anodic current while a limiting current density appears under cathodic polarization. Moreover, the impedance diagrams exhibit a shape representative of a kind of finite-length… Show more

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Cited by 26 publications
(30 citation statements)
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“…on the reaction mechanisms and electrode performances. Two models were developed considering the state-of-the-art materials with the LSCF-CGO [28], [47] composite and Ni-YSZ [48] cermet for the air and fuel electrodes, respectively. Both models were built up considering a slice of porous electrode described as a homogenous medium.…”
Section: Micro-scale Models: Electrodes Functional Layermentioning
confidence: 99%
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“…on the reaction mechanisms and electrode performances. Two models were developed considering the state-of-the-art materials with the LSCF-CGO [28], [47] composite and Ni-YSZ [48] cermet for the air and fuel electrodes, respectively. Both models were built up considering a slice of porous electrode described as a homogenous medium.…”
Section: Micro-scale Models: Electrodes Functional Layermentioning
confidence: 99%
“…All the kinetic constants are thermally activated and expressed with an Arrhenius law. Activations energies were already calculated and published in [28] and [48] for the air and fuel electrodes, respectively.…”
Section: Micro-scale Models: Electrodes Functional Layermentioning
confidence: 99%
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