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High Temperature Water Electrolysis Using Metal Supported Solid Oxide Electrolyzer Cells (SOEC)

Schiller, Günter und Ansar, Asif Syed und Patz, Olaf (2010) High Temperature Water Electrolysis Using Metal Supported Solid Oxide Electrolyzer Cells (SOEC). CIMTEC 2010 - 5th Forum on New Materials, 2010-06-13 - 2010-06-18, Montecatini Terme, Italien.

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Kurzfassung

Metal supported cells as developed at DLR for use as solid oxide fuel cells by applying plasma deposition technologies were investigated in operation of high temperature steam electrolysis. The cells consisted of a porous ferritic steel support, a diffusion barrier layer, a Ni/YSZ fuel electrode, a YSZ electrolyte and a LSCF oxygen electrode. During fuel cell and electrolysis operation the cells were electrochemically characterized by means of i-V characteristics and electrochemical impedance spectroscopy measurements including a long-term test over 2000 hours. The results of electrochemical performance and long-term durability tests of both single cells and single repeating units (cell including metallic interconnect) are reported. During electrolysis operation at an operating temperature of 850 °C a cell voltage of 1.28 V was achieved at a current density of -1.0 Acm-2; at 800 °C the cell voltage was 1.40 V at the same operating conditions. The impedance spectra revealed a significantly enhanced polarization resistance during electrolysis operation compared to fuel cell operation which was mainly attributed to the hydrogen electrode. During a long-term test run of a single cell over 2000 hours a degradation rate of 3.2% per 1000 hours was observed for operation with steam content of 43% at 800 °C and a current density of -0.3 Acm-2. Testing of a single repeating unit proved that a good contacting of cell and metallic interconnect is of major importance to achieve good performance. A test run over nearly 1000 hours showed a remarkably low degradation rate.

elib-URL des Eintrags:https://elib.dlr.de/64620/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:High Temperature Water Electrolysis Using Metal Supported Solid Oxide Electrolyzer Cells (SOEC)
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schiller, GünterDLR-TTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Ansar, Asif SyedDLR-TTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Patz, OlafNICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Juni 2010
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:High temperature steam electrolysis, metal supported cell, electrochemical performance, degradation behaviour, single cell, single repeating unit
Veranstaltungstitel:CIMTEC 2010 - 5th Forum on New Materials
Veranstaltungsort:Montecatini Terme, Italien
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:13 Juni 2010
Veranstaltungsende:18 Juni 2010
Veranstalter :Pietro Vincenzini
HGF - Forschungsbereich:Energie
HGF - Programm:Rationelle Energieumwandlung (alt)
HGF - Programmthema:E BZ - Brennstoffzellen (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E BZ - Brennstoffzellen
DLR - Teilgebiet (Projekt, Vorhaben):E - Hochtemperatur-Brennstoffzellen (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Elektrochemische Energietechnik
Hinterlegt von: Schiller, Dr.rer.nat. Günter
Hinterlegt am:21 Jul 2010 08:52
Letzte Änderung:24 Apr 2024 19:29

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