Electrochemical, structural and surface characterization of nickel/zirconia solid oxide fuel cell anodes in coal gas containing antimony

Olga A. Marina, Larry R. Pederson, Christopher A. Coyle, Edwin C. Thomsen, Ponnusamy Nachimuthu, Danny J. Edwards

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The interactions of antimony with the nickel-zirconia anode in solid oxide fuel cells (SOFCs) have been investigated. Tests with both anode-supported and electrolyte-supported button cells were performed at 700 and 800 °C in synthetic coal gas containing 100 ppb to 9 ppm antimony. Minor performance loss was observed immediately after Sb introduction to coal gas resulting in ca. 5% power output drop. While no further degradation was observed during the following several hundred hours of testing, cells abruptly and irreversibly failed after 800-1600 h depending on Sb concentration and test temperature. Antimony was found to interact strongly with nickel resulting in extensive alteration phase formation, consistent with expectations based on thermodynamic properties. Nickel antimonide phases, NiSb and Ni5Sb2, were partially coalesced into large grains and eventually affected electronic percolation through the anode support. Initial degradation was attributed to diffusion of antimony to the active anode/electrolyte interface to form an adsorption layer, while the late stage degradation was due the Ni-Sb phase formation. Assuming an average Sb concentration in coal gas of 0.07 ppmv, a 500 μm thick Ni/zirconia anode-supported cell is not expected to fail within 7 years when operated at a power output of 0.5 W cm-2 and fuel utilization above 50%.

Original languageEnglish
Pages (from-to)4911-4922
Number of pages12
JournalJournal of Power Sources
Volume196
Issue number11
DOIs
Publication statusPublished - 1 Jun 2011
Externally publishedYes

Fingerprint

cell anodes
Antimony
Coal gas
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
antimony
Nickel
zirconium oxides
Zirconia
coal
Anodes
anodes
nickel
degradation
gases
Degradation
Electrolytes
electrolytes
buttons
output

Keywords

  • Antimony adsorption
  • Coal gas contaminants
  • Ni/YSZ SOFC anode degradation mechanism
  • Nickel antimony interaction
  • Thermochemical calculations

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

Electrochemical, structural and surface characterization of nickel/zirconia solid oxide fuel cell anodes in coal gas containing antimony. / Marina, Olga A.; Pederson, Larry R.; Coyle, Christopher A.; Thomsen, Edwin C.; Nachimuthu, Ponnusamy; Edwards, Danny J.

In: Journal of Power Sources, Vol. 196, No. 11, 01.06.2011, p. 4911-4922.

Research output: Contribution to journalArticle

Marina, Olga A. ; Pederson, Larry R. ; Coyle, Christopher A. ; Thomsen, Edwin C. ; Nachimuthu, Ponnusamy ; Edwards, Danny J. / Electrochemical, structural and surface characterization of nickel/zirconia solid oxide fuel cell anodes in coal gas containing antimony. In: Journal of Power Sources. 2011 ; Vol. 196, No. 11. pp. 4911-4922.
@article{0dc2efe020a548e58b02ce71c54f55b9,
title = "Electrochemical, structural and surface characterization of nickel/zirconia solid oxide fuel cell anodes in coal gas containing antimony",
abstract = "The interactions of antimony with the nickel-zirconia anode in solid oxide fuel cells (SOFCs) have been investigated. Tests with both anode-supported and electrolyte-supported button cells were performed at 700 and 800 °C in synthetic coal gas containing 100 ppb to 9 ppm antimony. Minor performance loss was observed immediately after Sb introduction to coal gas resulting in ca. 5{\%} power output drop. While no further degradation was observed during the following several hundred hours of testing, cells abruptly and irreversibly failed after 800-1600 h depending on Sb concentration and test temperature. Antimony was found to interact strongly with nickel resulting in extensive alteration phase formation, consistent with expectations based on thermodynamic properties. Nickel antimonide phases, NiSb and Ni5Sb2, were partially coalesced into large grains and eventually affected electronic percolation through the anode support. Initial degradation was attributed to diffusion of antimony to the active anode/electrolyte interface to form an adsorption layer, while the late stage degradation was due the Ni-Sb phase formation. Assuming an average Sb concentration in coal gas of 0.07 ppmv, a 500 μm thick Ni/zirconia anode-supported cell is not expected to fail within 7 years when operated at a power output of 0.5 W cm-2 and fuel utilization above 50{\%}.",
keywords = "Antimony adsorption, Coal gas contaminants, Ni/YSZ SOFC anode degradation mechanism, Nickel antimony interaction, Thermochemical calculations",
author = "Marina, {Olga A.} and Pederson, {Larry R.} and Coyle, {Christopher A.} and Thomsen, {Edwin C.} and Ponnusamy Nachimuthu and Edwards, {Danny J.}",
year = "2011",
month = "6",
day = "1",
doi = "10.1016/j.jpowsour.2011.02.027",
language = "English",
volume = "196",
pages = "4911--4922",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",
number = "11",

}

TY - JOUR

T1 - Electrochemical, structural and surface characterization of nickel/zirconia solid oxide fuel cell anodes in coal gas containing antimony

AU - Marina, Olga A.

AU - Pederson, Larry R.

AU - Coyle, Christopher A.

AU - Thomsen, Edwin C.

AU - Nachimuthu, Ponnusamy

AU - Edwards, Danny J.

PY - 2011/6/1

Y1 - 2011/6/1

N2 - The interactions of antimony with the nickel-zirconia anode in solid oxide fuel cells (SOFCs) have been investigated. Tests with both anode-supported and electrolyte-supported button cells were performed at 700 and 800 °C in synthetic coal gas containing 100 ppb to 9 ppm antimony. Minor performance loss was observed immediately after Sb introduction to coal gas resulting in ca. 5% power output drop. While no further degradation was observed during the following several hundred hours of testing, cells abruptly and irreversibly failed after 800-1600 h depending on Sb concentration and test temperature. Antimony was found to interact strongly with nickel resulting in extensive alteration phase formation, consistent with expectations based on thermodynamic properties. Nickel antimonide phases, NiSb and Ni5Sb2, were partially coalesced into large grains and eventually affected electronic percolation through the anode support. Initial degradation was attributed to diffusion of antimony to the active anode/electrolyte interface to form an adsorption layer, while the late stage degradation was due the Ni-Sb phase formation. Assuming an average Sb concentration in coal gas of 0.07 ppmv, a 500 μm thick Ni/zirconia anode-supported cell is not expected to fail within 7 years when operated at a power output of 0.5 W cm-2 and fuel utilization above 50%.

AB - The interactions of antimony with the nickel-zirconia anode in solid oxide fuel cells (SOFCs) have been investigated. Tests with both anode-supported and electrolyte-supported button cells were performed at 700 and 800 °C in synthetic coal gas containing 100 ppb to 9 ppm antimony. Minor performance loss was observed immediately after Sb introduction to coal gas resulting in ca. 5% power output drop. While no further degradation was observed during the following several hundred hours of testing, cells abruptly and irreversibly failed after 800-1600 h depending on Sb concentration and test temperature. Antimony was found to interact strongly with nickel resulting in extensive alteration phase formation, consistent with expectations based on thermodynamic properties. Nickel antimonide phases, NiSb and Ni5Sb2, were partially coalesced into large grains and eventually affected electronic percolation through the anode support. Initial degradation was attributed to diffusion of antimony to the active anode/electrolyte interface to form an adsorption layer, while the late stage degradation was due the Ni-Sb phase formation. Assuming an average Sb concentration in coal gas of 0.07 ppmv, a 500 μm thick Ni/zirconia anode-supported cell is not expected to fail within 7 years when operated at a power output of 0.5 W cm-2 and fuel utilization above 50%.

KW - Antimony adsorption

KW - Coal gas contaminants

KW - Ni/YSZ SOFC anode degradation mechanism

KW - Nickel antimony interaction

KW - Thermochemical calculations

UR - http://www.scopus.com/inward/record.url?scp=79952994277&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952994277&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2011.02.027

DO - 10.1016/j.jpowsour.2011.02.027

M3 - Article

VL - 196

SP - 4911

EP - 4922

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

IS - 11

ER -