Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Standard

Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells. / Kromp, Alexander; Nielsen, Jimmi; Blennow Tullmar, Peter; Klemensø, Trine; Weber, André.

Proceedings of the 10th European SOFC Forum. European Fuel Cell Forum, 2012. p. 84-94.

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Harvard

Kromp, A, Nielsen, J, Blennow Tullmar, P, Klemensø, T & Weber, A 2012, 'Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells'. in Proceedings of the 10th European SOFC Forum. European Fuel Cell Forum, pp. 84-94.

APA

Kromp, A., Nielsen, J., Blennow Tullmar, P., Klemensø, T., & Weber, A. (2012). Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells. In Proceedings of the 10th European SOFC Forum. (pp. 84-94). Chapter 7.European Fuel Cell Forum.

CBE

Kromp A, Nielsen J, Blennow Tullmar P, Klemensø T, Weber A. 2012. Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells. In Proceedings of the 10th European SOFC Forum. European Fuel Cell Forum. pp. 84-94.

MLA

Kromp, Alexander et al. "Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells". Proceedings of the 10th European SOFC Forum. Chapter 7, European Fuel Cell Forum. 2012. 84-94.

Vancouver

Kromp A, Nielsen J, Blennow Tullmar P, Klemensø T, Weber A. Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells. In Proceedings of the 10th European SOFC Forum. European Fuel Cell Forum. 2012. p. 84-94.

Author

Kromp, Alexander; Nielsen, Jimmi; Blennow Tullmar, Peter; Klemensø, Trine; Weber, André / Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells.

Proceedings of the 10th European SOFC Forum. European Fuel Cell Forum, 2012. p. 84-94.

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Bibtex

@inbook{2c97853c45fb4a438f8c27c7c11de5b5,
title = "Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells",
publisher = "European Fuel Cell Forum",
author = "Alexander Kromp and Jimmi Nielsen and {Blennow Tullmar}, Peter and Trine Klemensø and André Weber",
note = "2012; 7",
year = "2012",
pages = "84-94",
booktitle = "Proceedings of the 10th European SOFC Forum",

}

RIS

TY - GEN

T1 - Break-down of Losses in High Performing Metal-Supported Solid Oxide Fuel Cells

A1 - Kromp,Alexander

A1 - Nielsen,Jimmi

A1 - Blennow Tullmar,Peter

A1 - Klemensø,Trine

A1 - Weber,André

AU - Kromp,Alexander

AU - Nielsen,Jimmi

AU - Blennow Tullmar,Peter

AU - Klemensø,Trine

AU - Weber,André

PB - European Fuel Cell Forum

PY - 2012

Y1 - 2012

N2 - Metal supported SOFC designs offer competitive advantages such as reduced material costs and improved mechanical robustness. On the other hand, disadvantages might arise due to possible corrosion of the porous metal parts during processing and operation at high fuel utilization. In this paper we present the results of performance and stability improvements for a metal supported cell developed within the European project METSOFC and the Danish National Advanced Technology Foundation. The cells consist of a porous metal backbone, a metal / zirconia cermet anode and a 10ScYSZ electrolyte, cofired in hydrogen. The electrochemically active parts were applied by infiltrating CGO-Ni precursor solution into the porous metal and anode backbone and screenprinting (La,Sr)(Co,Fe)O3-based cathodes. To prevent a solid state reaction between cathode and zirconia electrolyte, CGO buffer layers were applied in between cathode and electrolyte. The detailed electrochemical characterization by means of impedance spectroscopy and a subsequent data analysis by the distribution of relaxation times enabled us to separate the different loss contributions in the cell. Based on an appropriate equivalent circuit model, the ohmic and polarization losses related to the gas diffusion in the metal support, the electrooxidation in the anode functional layer and the oxygen reduction in the mixed ionic electronic conducting cathode were determined. An additional process with a rather high relaxation frequency could be attributed to the formation of insulating interlayers at the cathode/electrolyte-interface. Based on these results, selective measures to improve performance and stability, such as (i) an improved PVD-deposited CGO buffer layer, (ii) LSC-CGO based in-situ sintered cathodes and (iii) reduced corrosion of the metal support were adopted and validated.

AB - Metal supported SOFC designs offer competitive advantages such as reduced material costs and improved mechanical robustness. On the other hand, disadvantages might arise due to possible corrosion of the porous metal parts during processing and operation at high fuel utilization. In this paper we present the results of performance and stability improvements for a metal supported cell developed within the European project METSOFC and the Danish National Advanced Technology Foundation. The cells consist of a porous metal backbone, a metal / zirconia cermet anode and a 10ScYSZ electrolyte, cofired in hydrogen. The electrochemically active parts were applied by infiltrating CGO-Ni precursor solution into the porous metal and anode backbone and screenprinting (La,Sr)(Co,Fe)O3-based cathodes. To prevent a solid state reaction between cathode and zirconia electrolyte, CGO buffer layers were applied in between cathode and electrolyte. The detailed electrochemical characterization by means of impedance spectroscopy and a subsequent data analysis by the distribution of relaxation times enabled us to separate the different loss contributions in the cell. Based on an appropriate equivalent circuit model, the ohmic and polarization losses related to the gas diffusion in the metal support, the electrooxidation in the anode functional layer and the oxygen reduction in the mixed ionic electronic conducting cathode were determined. An additional process with a rather high relaxation frequency could be attributed to the formation of insulating interlayers at the cathode/electrolyte-interface. Based on these results, selective measures to improve performance and stability, such as (i) an improved PVD-deposited CGO buffer layer, (ii) LSC-CGO based in-situ sintered cathodes and (iii) reduced corrosion of the metal support were adopted and validated.

BT - Proceedings of the 10th European SOFC Forum

T2 - Proceedings of the 10th European SOFC Forum

SP - 84

EP - 94

ER -