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Formulations of LSFN and LSCN as fuel electrode materials for high temperature co-electrolysis cells

Amaya-Dueñas, Diana M. und Sata, Noriko und Han, Feng und Schiller, Günter und Costa, Rémi und Friedrich, K. Andreas (2018) Formulations of LSFN and LSCN as fuel electrode materials for high temperature co-electrolysis cells. Electroceramics XVI, 2018-07-09 - 2018-07-12, Hasselt, Belgien.

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Kurzfassung

The efficient utilization of CO2 and its conversion into CO has received great interest since it is considered a suitable path for decarbonisation of human activity and a promising climate protection measure. Solid Oxide Electrolysis Cells (SOECs) offer a single step conversion by electrolysing simultaneously H2O and CO2 to obtain syngas (H2 + CO). This can subsequently be used as feedstock in the Fischer – Tropsch process to yield liquid synthetic fuels. In contrast to the syngas obtained by steam reforming of methane, high temperature co-electrolysis is advantageous since it enables fuel production without consuming non-renewable fossil fuels. In addition, SOEC operation at high temperatures, favours electrode reaction kinetics and decreases the electrolyte resistance, thereby decreasing the required electrical energy for co-electrolysis. State-of-the-art Ni-based cermets have been widely studied as fuel electrode materials due to their high catalytic properties towards H2O/CO2 splitting, as well as for their high electrical conductivity. However, they are susceptible to impurities and irreversible degradation in operation, e.g. by nickel depletion in the functional fuel electrode at high over-potential, as one of several effects. Therefore, further investigations are needed in order to propose mitigation strategies based on detailed understanding of degradation mechanisms. As an alternative, Perovskite-based oxides are promising electrode materials for SOECs due to their catalytic activity and stability in dual atmospheres, besides of being potentially resistant towards migration phenomena. With the aim to implement perovskite-based materials for the fuel electrode of a SOEC, lanthanum-transition-metal perovskites were investigated: (La0.6-x Sr0.4) Fe0.8Ni0.2O3 and (La0.7-x Sr0.3)Cr0.85Ni0.15O3. These precursors were produced by soft chemistry methods by varying their A-site deficiency stoichiometry. Particle morphologies were characterized by SEM and formation of crystalline phases were corroborated by XRD and TGA. Results are presented and discussed with the perspective of SOEC application.

elib-URL des Eintrags:https://elib.dlr.de/122758/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Formulations of LSFN and LSCN as fuel electrode materials for high temperature co-electrolysis cells
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Amaya-Dueñas, Diana M.Diana.AmayaDuenas (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Sata, NorikoNoriko.Sata (at) dlr.dehttps://orcid.org/0000-0002-3103-2051NICHT SPEZIFIZIERT
Han, FengFeng.Han (at) dlr.dehttps://orcid.org/0000-0003-1904-134XNICHT SPEZIFIZIERT
Schiller, Günterguenter.schiller (at) dlr.dehttps://orcid.org/0000-0001-5093-7625NICHT SPEZIFIZIERT
Costa, Rémiremi.costa (at) dlr.dehttps://orcid.org/0000-0002-3534-1935NICHT SPEZIFIZIERT
Friedrich, K. Andreasandreas.friedrich (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:9 Juli 2018
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Perovskite, A-site deficiency, fuel electrode, SOEC, co-electrolysis, CO2 conversion
Veranstaltungstitel:Electroceramics XVI
Veranstaltungsort:Hasselt, Belgien
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:9 Juli 2018
Veranstaltungsende:12 Juli 2018
Veranstalter :Hasselt University, Belgium
HGF - Forschungsbereich:Energie
HGF - Programm:Speicher und vernetzte Infrastrukturen
HGF - Programmthema:Elektrolyse und Wasserstoff
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SP - Energiespeicher
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Prozesse (Elektrolyse) (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Elektrochemische Energietechnik
Hinterlegt von: Amaya Duenas, Dr. Diana Maria
Hinterlegt am:19 Nov 2018 15:57
Letzte Änderung:24 Apr 2024 20:26

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