Improving oxygen electrodes by infiltration and surface decoration

Peter Vang Hendriksen, Mohamad Khoshkalam, Xiaofeng Tong, Dordije Tripkovic, Mohammad Ali Faghihi-Sani, Ming Chen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

For improving competitiveness of SOEC/SOFC-technology it is desirable to reduce the temperature of operation down towards 500 °C - 600 °C. This requires improvement of the oxygen electrode such that this does not limit performance. Here, we report results on modifying various back-bone type oxygen electrodes via infiltration of materials targeting a surface decoration with Pr-oxide or Pr,Ni,Cu-oxides. Different composite back-bone electrodes (based on micron-sized particles) were investigated; La0.6Sr0.4Co0.2Fe0.8O3/Ce0.9Gd0.1O2, (LSCF/CGO), La0.6Sr0.4FeO3 (LSF), and LaNi0.6Fe0.4O3/Ce0.9Gd0.1O2 (LNF/CGO). Marked performance improvements could be achieved with the infiltration, including a reduction by a factor of 3 of the polarization resistance at 600 °C for both LSF and the LSCF/CGO based state of the art electrodes. In a LNF/CGO composite backbone, infiltration with Pr-nitrate led to marked electrode performance improvement; reaching 0.14 Ωcm2 at 550 °C and 0.4 Ωcm2 at 500 °C, sufficiently fast not to limit overall cell performance (at 550 °C).
Original languageEnglish
JournalECS Transactions
Volume91
Issue number1
Pages (from-to)1413-1424
Number of pages12
ISSN1938-5862
DOIs
Publication statusPublished - 2019

Cite this

Hendriksen, Peter Vang ; Khoshkalam, Mohamad ; Tong, Xiaofeng ; Tripkovic, Dordije ; Faghihi-Sani, Mohammad Ali ; Chen, Ming. / Improving oxygen electrodes by infiltration and surface decoration. In: ECS Transactions. 2019 ; Vol. 91, No. 1. pp. 1413-1424.
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abstract = "For improving competitiveness of SOEC/SOFC-technology it is desirable to reduce the temperature of operation down towards 500 °C - 600 °C. This requires improvement of the oxygen electrode such that this does not limit performance. Here, we report results on modifying various back-bone type oxygen electrodes via infiltration of materials targeting a surface decoration with Pr-oxide or Pr,Ni,Cu-oxides. Different composite back-bone electrodes (based on micron-sized particles) were investigated; La0.6Sr0.4Co0.2Fe0.8O3/Ce0.9Gd0.1O2, (LSCF/CGO), La0.6Sr0.4FeO3 (LSF), and LaNi0.6Fe0.4O3/Ce0.9Gd0.1O2 (LNF/CGO). Marked performance improvements could be achieved with the infiltration, including a reduction by a factor of 3 of the polarization resistance at 600 °C for both LSF and the LSCF/CGO based state of the art electrodes. In a LNF/CGO composite backbone, infiltration with Pr-nitrate led to marked electrode performance improvement; reaching 0.14 Ωcm2 at 550 °C and 0.4 Ωcm2 at 500 °C, sufficiently fast not to limit overall cell performance (at 550 °C).",
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Improving oxygen electrodes by infiltration and surface decoration. / Hendriksen, Peter Vang; Khoshkalam, Mohamad; Tong, Xiaofeng; Tripkovic, Dordije; Faghihi-Sani, Mohammad Ali; Chen, Ming.

In: ECS Transactions, Vol. 91, No. 1, 2019, p. 1413-1424.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Improving oxygen electrodes by infiltration and surface decoration

AU - Hendriksen, Peter Vang

AU - Khoshkalam, Mohamad

AU - Tong, Xiaofeng

AU - Tripkovic, Dordije

AU - Faghihi-Sani, Mohammad Ali

AU - Chen, Ming

PY - 2019

Y1 - 2019

N2 - For improving competitiveness of SOEC/SOFC-technology it is desirable to reduce the temperature of operation down towards 500 °C - 600 °C. This requires improvement of the oxygen electrode such that this does not limit performance. Here, we report results on modifying various back-bone type oxygen electrodes via infiltration of materials targeting a surface decoration with Pr-oxide or Pr,Ni,Cu-oxides. Different composite back-bone electrodes (based on micron-sized particles) were investigated; La0.6Sr0.4Co0.2Fe0.8O3/Ce0.9Gd0.1O2, (LSCF/CGO), La0.6Sr0.4FeO3 (LSF), and LaNi0.6Fe0.4O3/Ce0.9Gd0.1O2 (LNF/CGO). Marked performance improvements could be achieved with the infiltration, including a reduction by a factor of 3 of the polarization resistance at 600 °C for both LSF and the LSCF/CGO based state of the art electrodes. In a LNF/CGO composite backbone, infiltration with Pr-nitrate led to marked electrode performance improvement; reaching 0.14 Ωcm2 at 550 °C and 0.4 Ωcm2 at 500 °C, sufficiently fast not to limit overall cell performance (at 550 °C).

AB - For improving competitiveness of SOEC/SOFC-technology it is desirable to reduce the temperature of operation down towards 500 °C - 600 °C. This requires improvement of the oxygen electrode such that this does not limit performance. Here, we report results on modifying various back-bone type oxygen electrodes via infiltration of materials targeting a surface decoration with Pr-oxide or Pr,Ni,Cu-oxides. Different composite back-bone electrodes (based on micron-sized particles) were investigated; La0.6Sr0.4Co0.2Fe0.8O3/Ce0.9Gd0.1O2, (LSCF/CGO), La0.6Sr0.4FeO3 (LSF), and LaNi0.6Fe0.4O3/Ce0.9Gd0.1O2 (LNF/CGO). Marked performance improvements could be achieved with the infiltration, including a reduction by a factor of 3 of the polarization resistance at 600 °C for both LSF and the LSCF/CGO based state of the art electrodes. In a LNF/CGO composite backbone, infiltration with Pr-nitrate led to marked electrode performance improvement; reaching 0.14 Ωcm2 at 550 °C and 0.4 Ωcm2 at 500 °C, sufficiently fast not to limit overall cell performance (at 550 °C).

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