Durability of solid oxide electrolysis stack under dynamic load cycling for syngas production

Megha Rao, Xiufu Sun*, Anke Hagen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A 6-cell solid oxide electrolysis stack was tested under H2O + CO2 co-electrolysis conditions. The cells used in the stack consisted of a nickel-yttria stabilized zirconia (Ni-YSZ) fuel electrode, YSZ electrolyte and lanthanum strontium cobaltite-gadolinium doped ceria (LSC-GDC) composite oxygen electrode. The aim of this study was to investigate the stack durability when operated under dynamic load conditions simulating a wind energy powered SOEC stack for synthesis gas production. The degradation of the stack was observed to be less than 1%/1000 h in terms of area specific resistance during the 1000 h operation. Detailed electrochemical analysis revealed a constant ohmic resistance, indicating intact contact in the stack. Only minor degradation was observed, mainly due to the fuel electrode process. The overall stack voltage degradation rate was 0.8%/1000 h.
Original languageEnglish
Article number227781
JournalJournal of Power Sources
Volume451
Number of pages7
ISSN0378-7753
DOIs
Publication statusPublished - 2020

Keywords

  • Solid oxide electrolysis stac
  • Dynamic load testing
  • Durability
  • Syngas production
  • Electrochemical impedance spectroscop

Cite this

@article{a2267f05d1524b9d9bffac90f25b2c72,
title = "Durability of solid oxide electrolysis stack under dynamic load cycling for syngas production",
abstract = "A 6-cell solid oxide electrolysis stack was tested under H2O + CO2 co-electrolysis conditions. The cells used in the stack consisted of a nickel-yttria stabilized zirconia (Ni-YSZ) fuel electrode, YSZ electrolyte and lanthanum strontium cobaltite-gadolinium doped ceria (LSC-GDC) composite oxygen electrode. The aim of this study was to investigate the stack durability when operated under dynamic load conditions simulating a wind energy powered SOEC stack for synthesis gas production. The degradation of the stack was observed to be less than 1{\%}/1000 h in terms of area specific resistance during the 1000 h operation. Detailed electrochemical analysis revealed a constant ohmic resistance, indicating intact contact in the stack. Only minor degradation was observed, mainly due to the fuel electrode process. The overall stack voltage degradation rate was 0.8{\%}/1000 h.",
keywords = "Solid oxide electrolysis stac, Dynamic load testing, Durability, Syngas production, Electrochemical impedance spectroscop",
author = "Megha Rao and Xiufu Sun and Anke Hagen",
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doi = "10.1016/j.jpowsour.2020.227781",
language = "English",
volume = "451",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",

}

Durability of solid oxide electrolysis stack under dynamic load cycling for syngas production. / Rao, Megha; Sun, Xiufu; Hagen, Anke.

In: Journal of Power Sources, Vol. 451, 227781, 2020.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Durability of solid oxide electrolysis stack under dynamic load cycling for syngas production

AU - Rao, Megha

AU - Sun, Xiufu

AU - Hagen, Anke

PY - 2020

Y1 - 2020

N2 - A 6-cell solid oxide electrolysis stack was tested under H2O + CO2 co-electrolysis conditions. The cells used in the stack consisted of a nickel-yttria stabilized zirconia (Ni-YSZ) fuel electrode, YSZ electrolyte and lanthanum strontium cobaltite-gadolinium doped ceria (LSC-GDC) composite oxygen electrode. The aim of this study was to investigate the stack durability when operated under dynamic load conditions simulating a wind energy powered SOEC stack for synthesis gas production. The degradation of the stack was observed to be less than 1%/1000 h in terms of area specific resistance during the 1000 h operation. Detailed electrochemical analysis revealed a constant ohmic resistance, indicating intact contact in the stack. Only minor degradation was observed, mainly due to the fuel electrode process. The overall stack voltage degradation rate was 0.8%/1000 h.

AB - A 6-cell solid oxide electrolysis stack was tested under H2O + CO2 co-electrolysis conditions. The cells used in the stack consisted of a nickel-yttria stabilized zirconia (Ni-YSZ) fuel electrode, YSZ electrolyte and lanthanum strontium cobaltite-gadolinium doped ceria (LSC-GDC) composite oxygen electrode. The aim of this study was to investigate the stack durability when operated under dynamic load conditions simulating a wind energy powered SOEC stack for synthesis gas production. The degradation of the stack was observed to be less than 1%/1000 h in terms of area specific resistance during the 1000 h operation. Detailed electrochemical analysis revealed a constant ohmic resistance, indicating intact contact in the stack. Only minor degradation was observed, mainly due to the fuel electrode process. The overall stack voltage degradation rate was 0.8%/1000 h.

KW - Solid oxide electrolysis stac

KW - Dynamic load testing

KW - Durability

KW - Syngas production

KW - Electrochemical impedance spectroscop

U2 - 10.1016/j.jpowsour.2020.227781

DO - 10.1016/j.jpowsour.2020.227781

M3 - Journal article

VL - 451

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

M1 - 227781

ER -