Effect of fuel impurity on structural integrity of Ni-YSZ anode of SOFCs

Wenning Liu, Xin Sun, Olga Marina, Larry Pederson, Moe Khaleel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Electricity production through the integration of coal gasification with solid oxide fuel cells (SOFCs) may potentially be an efficient technique for clean energy generation. However, multiple minor and trace components are naturally present in coals. These impurities in coal gas not only degrade the electrochemical performance of Ni-YSZ anode used in SOFCs, but also severely endanger the structural integrity of the Ni-YSZ anode. In this paper, the effect of trace impurity in coal syngas on the mechanical degradation of Ni-YSZ anode was studied by using an integrated experimental/modeling approach. Phosphorus is taken as an example of impurity. Anode-support button cell was used to experimentally explore the migration of phosphorous impurity in the Ni-YSZ anode of SOFCs. X-ray mapping was used to show elemental distributions and new phase formation. The subsequent finite element stress analyses were conducted using the actual microstructure of the anode to illustrate the degradation mechanism. It was found that volume expansion induced by the Ni phase change produces high stress level such that local failure of the Ni-YSZ anode is possible under the operating conditions.

Original languageEnglish
Title of host publicationCeramic Transactions
Pages87-100
Number of pages14
Volume227
Publication statusPublished - 5 Aug 2011
Externally publishedYes
EventAdvances in Materials Science for Environmental and Nuclear Technology II - Materials Science and Technology 2010 Conference and Exhibition, MS and T'10 - Houston, TX, United States
Duration: 17 Oct 201021 Oct 2010

Publication series

NameCeramic Transactions
Volume227
ISSN (Print)10421122

Other

OtherAdvances in Materials Science for Environmental and Nuclear Technology II - Materials Science and Technology 2010 Conference and Exhibition, MS and T'10
CountryUnited States
CityHouston, TX
Period17/10/1021/10/10

Fingerprint

Structural integrity
Solid oxide fuel cells (SOFC)
Anodes
Impurities
Coal
Degradation
Coal gas
Coal gasification
Phosphorus
Electricity
X rays
Microstructure

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Liu, W., Sun, X., Marina, O., Pederson, L., & Khaleel, M. (2011). Effect of fuel impurity on structural integrity of Ni-YSZ anode of SOFCs. In Ceramic Transactions (Vol. 227, pp. 87-100). (Ceramic Transactions; Vol. 227).

Effect of fuel impurity on structural integrity of Ni-YSZ anode of SOFCs. / Liu, Wenning; Sun, Xin; Marina, Olga; Pederson, Larry; Khaleel, Moe.

Ceramic Transactions. Vol. 227 2011. p. 87-100 (Ceramic Transactions; Vol. 227).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Liu, W, Sun, X, Marina, O, Pederson, L & Khaleel, M 2011, Effect of fuel impurity on structural integrity of Ni-YSZ anode of SOFCs. in Ceramic Transactions. vol. 227, Ceramic Transactions, vol. 227, pp. 87-100, Advances in Materials Science for Environmental and Nuclear Technology II - Materials Science and Technology 2010 Conference and Exhibition, MS and T'10, Houston, TX, United States, 17/10/10.
Liu W, Sun X, Marina O, Pederson L, Khaleel M. Effect of fuel impurity on structural integrity of Ni-YSZ anode of SOFCs. In Ceramic Transactions. Vol. 227. 2011. p. 87-100. (Ceramic Transactions).
Liu, Wenning ; Sun, Xin ; Marina, Olga ; Pederson, Larry ; Khaleel, Moe. / Effect of fuel impurity on structural integrity of Ni-YSZ anode of SOFCs. Ceramic Transactions. Vol. 227 2011. pp. 87-100 (Ceramic Transactions).
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