Selection of cathode materials for forsterite-supported solid oxide fuel cells – Part II: Electro-catalytic activity
Grimm F, Neubert M, Karl J, Menzler NH, Guillon O (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 451
Article Number: 227811
DOI: 10.1016/j.jpowsour.2020.227811
Abstract
Based on the interactions and the formation of secondary phases of various SOFC cathode materials if they are processed with the restrictions of an inert-supported cell utilizing forsterite as support material (described in Part I), impedance measurements and cell tests were performed to clarify the impact of the described interactions on the material combinations electrocatalytic performance. Subsequently Part II focusses on the preselection of a cathode material displaying a higher catalytic activity compared to the currently used LSM/8YSZ cathode of the inert-supported cell concept. In order to do so symmetrical cells, mimicking the processing, were fabricated by co-firing various cathodes (La0.58Sr0.4Co0.2Fe0.8O3; Pr0.58Sr0.4Co0.2Fe0.8O3; La0.58Sr0.4CoO3; La0.58Sr0.4FeO3; La0.58Ca0.4Co0.2Fe0.8O3; (La0.8Sr0.2)0.95Fe0.2Mn0.8O3; (La0.9Sr0.1)0.95Fe0.7Mn0.3O3) together with an La0.65Sr0.3MnO3 current collector layer (CCL) or with one LSM CCL containing 20 wt% of forsterite. The results indicate that the catalytic activity of the cathodes cannot simply be related to the number or amount of secondary phases formed during the co-firing if forsterite is present or not as LSF, which displayed the formation of numerous secondary phases (Part I), exhibits the best catalytic activity. The following ascending order of catalytic activity was obtained: LSF (0.25 Ωcm2) > LSM/8YSZ > PSCF > LSFM > LSCF > LCCF > LSC (77.43 Ωcm2).
Authors with CRIS profile
Michael Neubert
Lehrstuhl für Energieverfahrenstechnik
Jürgen Karl
Lehrstuhl für Energieverfahrenstechnik
Involved external institutions
Germany (DE)How to cite
APA:
Grimm, F., Neubert, M., Karl, J., Menzler, N.H., & Guillon, O. (2020). Selection of cathode materials for forsterite-supported solid oxide fuel cells – Part II: Electro-catalytic activity. Journal of Power Sources, 451. https://dx.doi.org/10.1016/j.jpowsour.2020.227811
MLA:
Grimm, Fabian, et al. "Selection of cathode materials for forsterite-supported solid oxide fuel cells – Part II: Electro-catalytic activity." Journal of Power Sources 451 (2020).
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