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Improving atmospheric plasma sprayed electrolyte layers of solid oxide fuel cells by use of a powder separator

Liu, Taikai und Arnold, Johannes (2016) Improving atmospheric plasma sprayed electrolyte layers of solid oxide fuel cells by use of a powder separator. International Thermal Spray Conference & Exhibition 2016, 2016-05-09 - 2016-05-12, Shanghai, China.

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Kurzfassung

In order to increase the performance of solid oxide fuel cells (SOFCs) the property of the electrolyte deposited by atmospheric plasma spraying (APS) has to be optimized concerning surface roughness and density. In this work, a dense YSZ coating with homogenous structure was realized on a NiO-YSZ anode which was supported by a porous metal substrate made of Crofer 22 H. A powder separator, which was able to diminish fluctuations of the in-flight particle stream, was used the first time to stabilize the APS process. During powder feeding a fully yttria-stabilized zirconia powder was on-line separated into two parts: a fraction of fine particles which were fed directly to the plasma, and a fraction of coarse particles which were collected and reused. The resulting coating exhibited a high homogeneity both in cross section and on surface. Validated by SEM images, the optimized coating did not possess any cracks and the porosity ratio was close to that found by vacuum plasma spraying (VPS) when two separators were employed. The gas leak rate shows an obvious increase of electrolyte performance compared to results without any powder separator.

elib-URL des Eintrags:https://elib.dlr.de/110531/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Improving atmospheric plasma sprayed electrolyte layers of solid oxide fuel cells by use of a powder separator
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Liu, TaikaiTaikai.Liu (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Arnold, Johannesjohannes.arnold (at) dlr.dehttps://orcid.org/0000-0002-3215-2215NICHT SPEZIFIZIERT
Datum:11 Mai 2016
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Performance, SOFC, electrolyte, atmospheric plasma spraying, APS, YSZ coating, NiO-YSZ anode, metal substrate, Crofer 22 H, powder separator, fine and coarse particles.
Veranstaltungstitel:International Thermal Spray Conference & Exhibition 2016
Veranstaltungsort:Shanghai, China
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:9 Mai 2016
Veranstaltungsende:12 Mai 2016
Veranstalter :DVS – German Welding Society
HGF - Forschungsbereich:Energie
HGF - Programm:Speicher und vernetzte Infrastrukturen
HGF - Programmthema:Brennstoffzellen
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E EV - Energieverfahrenstechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Prozesse (Brennstoffzellen) (alt), E - Elektrochemische Prozesse (Elektrolyse) (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Elektrochemische Energietechnik
Hinterlegt von: Arnold, Dr.-Ing. Johannes
Hinterlegt am:12 Jan 2017 07:32
Letzte Änderung:24 Apr 2024 20:15

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