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Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes: identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures

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DOI

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Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes : identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures. / Price, Robert; Weissen, Ueli; Grolig, Jan G.; Cassidy, Mark; Mai, Andreas; Irvine, John T. S.

In: Journal of Materials Chemistry A, Vol. 9, No. 16, 28.04.2021, p. 10404-10418.

Research output: Contribution to journalArticlepeer-review

Harvard

Price, R, Weissen, U, Grolig, JG, Cassidy, M, Mai, A & Irvine, JTS 2021, 'Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes: identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures', Journal of Materials Chemistry A, vol. 9, no. 16, pp. 10404-10418. https://doi.org/10.1039/d1ta00416f

APA

Price, R., Weissen, U., Grolig, J. G., Cassidy, M., Mai, A., & Irvine, J. T. S. (2021). Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes: identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures. Journal of Materials Chemistry A, 9(16), 10404-10418. https://doi.org/10.1039/d1ta00416f

Vancouver

Price R, Weissen U, Grolig JG, Cassidy M, Mai A, Irvine JTS. Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes: identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures. Journal of Materials Chemistry A. 2021 Apr 28;9(16):10404-10418. https://doi.org/10.1039/d1ta00416f

Author

Price, Robert ; Weissen, Ueli ; Grolig, Jan G. ; Cassidy, Mark ; Mai, Andreas ; Irvine, John T. S. / Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes : identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures. In: Journal of Materials Chemistry A. 2021 ; Vol. 9, No. 16. pp. 10404-10418.

Bibtex - Download

@article{7dc872942c6d46e5a6771ab7136c3c62,
title = "Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes: identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures",
abstract = "Solid oxide fuel cells (SOFC) comprising LSM-YSZ/LSM composite cathodes, 6ScSZ electrolytes and La0.20Sr0.25Ca0.45TiO3 (LSCTA−) anode {\textquoteleft}backbone{\textquoteright} microstructures were prepared using thick-film ceramic processing techniques. Activation and decoration of the LSCTA− anode {\textquoteleft}backbone{\textquoteright} with electrocatalytic coatings of cerium-based oxides and metallic Ni or Pt particles was achieved using the technique of catalyst co-impregnation. SOFC containing Ni/CGO, Ni/CeO2 and Pt/CGO impregnated LSCTA anodes were tested up to ∼1000 hours by the Swiss SOFC manufacturer: HEXIS, under realistic operating conditions, including 15 redox, thermo and thermoredox cycles. The voltage degradation rates observed over the entire test period for the SOFC containing the Ni/CGO, Ni/CeO2 and Pt/CGO impregnated LSCTA− anodes were 14.9%, 7.7% and 13.4%, respectively. Post-mortem microscopic analyses indicated that CeO2 formed ubiquitous coatings upon the LSCTA− anode microstructure, allowing retention of a high population density of metallic (Ni) particles, whilst CGO formed {\textquoteleft}islands{\textquoteright} upon the microstructure and some agglomerates within the pores, leading to more facile agglomeration of metallic (Ni and Pt) nanoparticles. Correlation of the post-mortem microscopy with AC impedance analysis revealed that the agglomeration of metallic catalyst resulted in an increase in the high-frequency anode polarisation resistance, whilst agglomeration of the ceria-based component directly resulted in the development of a low-frequency process that may be attributed to combined contributions from gas conversion and chemical capacitance.",
author = "Robert Price and Ueli Weissen and Grolig, {Jan G.} and Mark Cassidy and Andreas Mai and Irvine, {John T. S.}",
note = "Funding from the University of St Andrews and HEXIS AG is acknowledged, in addition to the EPSRC Grants: EP/M014304/1 “Tailoring of Microstructural Evolution in Impregnated SOFC Electrodes” and EP/L017008/1 “Capital for Great Technologies”.",
year = "2021",
month = apr,
day = "28",
doi = "10.1039/d1ta00416f",
language = "English",
volume = "9",
pages = "10404--10418",
journal = "Journal of Materials Chemistry A",
issn = "2050-7488",
publisher = "ROYAL SOC CHEMISTRY",
number = "16",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Durability of La0.20Sr0.25Ca0.45TiO3-based SOFC anodes

T2 - identifying sources of degradation in Ni and Pt/ceria co-impregnated fuel electrode microstructures

AU - Price, Robert

AU - Weissen, Ueli

AU - Grolig, Jan G.

AU - Cassidy, Mark

AU - Mai, Andreas

AU - Irvine, John T. S.

N1 - Funding from the University of St Andrews and HEXIS AG is acknowledged, in addition to the EPSRC Grants: EP/M014304/1 “Tailoring of Microstructural Evolution in Impregnated SOFC Electrodes” and EP/L017008/1 “Capital for Great Technologies”.

PY - 2021/4/28

Y1 - 2021/4/28

N2 - Solid oxide fuel cells (SOFC) comprising LSM-YSZ/LSM composite cathodes, 6ScSZ electrolytes and La0.20Sr0.25Ca0.45TiO3 (LSCTA−) anode ‘backbone’ microstructures were prepared using thick-film ceramic processing techniques. Activation and decoration of the LSCTA− anode ‘backbone’ with electrocatalytic coatings of cerium-based oxides and metallic Ni or Pt particles was achieved using the technique of catalyst co-impregnation. SOFC containing Ni/CGO, Ni/CeO2 and Pt/CGO impregnated LSCTA anodes were tested up to ∼1000 hours by the Swiss SOFC manufacturer: HEXIS, under realistic operating conditions, including 15 redox, thermo and thermoredox cycles. The voltage degradation rates observed over the entire test period for the SOFC containing the Ni/CGO, Ni/CeO2 and Pt/CGO impregnated LSCTA− anodes were 14.9%, 7.7% and 13.4%, respectively. Post-mortem microscopic analyses indicated that CeO2 formed ubiquitous coatings upon the LSCTA− anode microstructure, allowing retention of a high population density of metallic (Ni) particles, whilst CGO formed ‘islands’ upon the microstructure and some agglomerates within the pores, leading to more facile agglomeration of metallic (Ni and Pt) nanoparticles. Correlation of the post-mortem microscopy with AC impedance analysis revealed that the agglomeration of metallic catalyst resulted in an increase in the high-frequency anode polarisation resistance, whilst agglomeration of the ceria-based component directly resulted in the development of a low-frequency process that may be attributed to combined contributions from gas conversion and chemical capacitance.

AB - Solid oxide fuel cells (SOFC) comprising LSM-YSZ/LSM composite cathodes, 6ScSZ electrolytes and La0.20Sr0.25Ca0.45TiO3 (LSCTA−) anode ‘backbone’ microstructures were prepared using thick-film ceramic processing techniques. Activation and decoration of the LSCTA− anode ‘backbone’ with electrocatalytic coatings of cerium-based oxides and metallic Ni or Pt particles was achieved using the technique of catalyst co-impregnation. SOFC containing Ni/CGO, Ni/CeO2 and Pt/CGO impregnated LSCTA anodes were tested up to ∼1000 hours by the Swiss SOFC manufacturer: HEXIS, under realistic operating conditions, including 15 redox, thermo and thermoredox cycles. The voltage degradation rates observed over the entire test period for the SOFC containing the Ni/CGO, Ni/CeO2 and Pt/CGO impregnated LSCTA− anodes were 14.9%, 7.7% and 13.4%, respectively. Post-mortem microscopic analyses indicated that CeO2 formed ubiquitous coatings upon the LSCTA− anode microstructure, allowing retention of a high population density of metallic (Ni) particles, whilst CGO formed ‘islands’ upon the microstructure and some agglomerates within the pores, leading to more facile agglomeration of metallic (Ni and Pt) nanoparticles. Correlation of the post-mortem microscopy with AC impedance analysis revealed that the agglomeration of metallic catalyst resulted in an increase in the high-frequency anode polarisation resistance, whilst agglomeration of the ceria-based component directly resulted in the development of a low-frequency process that may be attributed to combined contributions from gas conversion and chemical capacitance.

U2 - 10.1039/d1ta00416f

DO - 10.1039/d1ta00416f

M3 - Article

VL - 9

SP - 10404

EP - 10418

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7488

IS - 16

ER -

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