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Engineering and optimization of electrode/electrolyte interfaces to increase solid oxide fuel cell (SOFC) performances

Abstract : In this work, we have established an industrial fabrication protocol for single fuel cells with either architectured or planar electrode/electrolyte interfaces. We have demonstrated that in two types of samples, differing in materials, microstructure, number of layers, and architecture location, the architecturation of the electrode/electrolyte interface results in a highly significant performance increase. Polarization measurements and EIS are used to study the electrochemical performances of the cells, to compare the architectured and planar ones. We isolate the influence of the architecturation on global impedance spectra by using an innovative comparison method based on the study of the relative gaps of the frequency-dependent resistance parts. Thus, the architecturation has a strongly favorable influence on the electrochemical performances by enhancing the catalytic capabilities of the electrodes as well as the charge transfer (and in particular the ion transfer) within the cell. The architecturation induces a 60 % increase of the maximum power density for the Type I cells and 75% for the Type II cells.
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https://pastel.archives-ouvertes.fr/tel-03191339
Contributor : Abes Star :  Contact
Submitted on : Wednesday, April 7, 2021 - 9:24:03 AM
Last modification on : Friday, April 9, 2021 - 3:12:55 AM

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2021UPSLM001.pdf
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  • HAL Id : tel-03191339, version 1

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Rossen Tchakalov. Engineering and optimization of electrode/electrolyte interfaces to increase solid oxide fuel cell (SOFC) performances. Materials. Université Paris sciences et lettres, 2021. English. ⟨NNT : 2021UPSLM001⟩. ⟨tel-03191339⟩

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