Load cycling tests of reversible solid oxide cells - Effects of current density, steam content and utilization

A. Hauch; S. Pylpko; Geraud Cubizolles; J. Mougin

doi:10.1149/10301.0437ecst

Load cycling tests of reversible solid oxide cells - Effects of current density, steam content and utilization

A. Hauch, S. Pylpko, Geraud Cubizolles, J. Mougin

Research output: Contribution to journal › Conference article › Research › peer-review

Abstract

Four single cell rSOC tests were conducted to investigate the effect of current density, steam content and degree of utilization both upon galvanostatic SOFC and SOEC testing, and load cycling operation. Long-term degradation tests were performed at 700°C during constant galvanostatic SOFC (250 h) and SOEC (250 h) conditions followed by load cycling operation (up to 1000 h) in cycles of 16 h SOFC and 8 h SOEC. Applied current densities were 0.6 A/cm² and -1.2 A/cm²; and 0.4 A/cm² and -0.6 A/cm²; inlet gas composition i.e. p(H₂O)/p(H₂) of 90/10 and dry H₂, as well as a test applying p(H₂O)/p(H₂) of 50/50 for both modes. Furthermore, two different utilization degrees (80% and 40%) were applied. From these tests it is evident that the high current density is detrimental for the fuel electrode durability while high p(H₂O) does not seem problematic and cells sustained mechanical integrity upon load cycling.

Original language	English
Journal	ECS Transactions
Volume	103
Issue number	1
Pages (from-to)	437-450
Number of pages	14
ISSN	1938-5862
DOIs	https://doi.org/10.1149/10301.0437ecst
Publication status	Published - 2021
Event	17th International Symposium on Solid Oxide Fuel Cells - Stockholm, Sweden Duration: 18 Jul 2021 → 23 Jul 2021 Conference number: 17

Conference

Conference	17th International Symposium on Solid Oxide Fuel Cells
Number	17
Country/Territory	Sweden
City	Stockholm
Period	18/07/2021 → 23/07/2021

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10.1149/10301.0437ecst

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@inproceedings{42fa26242fde429c9d74e8e8b457cee2,

title = "Load cycling tests of reversible solid oxide cells - Effects of current density, steam content and utilization",

abstract = "Four single cell rSOC tests were conducted to investigate the effect of current density, steam content and degree of utilization both upon galvanostatic SOFC and SOEC testing, and load cycling operation. Long-term degradation tests were performed at 700°C during constant galvanostatic SOFC (250 h) and SOEC (250 h) conditions followed by load cycling operation (up to 1000 h) in cycles of 16 h SOFC and 8 h SOEC. Applied current densities were 0.6 A/cm2 and -1.2 A/cm2; and 0.4 A/cm2 and -0.6 A/cm2; inlet gas composition i.e. p(H2O)/p(H2) of 90/10 and dry H2, as well as a test applying p(H2O)/p(H2) of 50/50 for both modes. Furthermore, two different utilization degrees (80% and 40%) were applied. From these tests it is evident that the high current density is detrimental for the fuel electrode durability while high p(H2O) does not seem problematic and cells sustained mechanical integrity upon load cycling.",

author = "A. Hauch and S. Pylpko and Geraud Cubizolles and J. Mougin",

year = "2021",

doi = "10.1149/10301.0437ecst",

language = "English",

volume = "103",

pages = "437--450",

journal = "E C S Transactions",

issn = "1938-5862",

publisher = "The Electrochemical Society",

number = "1",

note = "17th International Symposium on Solid Oxide Fuel Cells, SOFC-XVII ; Conference date: 18-07-2021 Through 23-07-2021",

}

TY - GEN

T1 - Load cycling tests of reversible solid oxide cells - Effects of current density, steam content and utilization

AU - Hauch, A.

AU - Pylpko, S.

AU - Cubizolles, Geraud

AU - Mougin, J.

N1 - Conference code: 17

PY - 2021

Y1 - 2021

N2 - Four single cell rSOC tests were conducted to investigate the effect of current density, steam content and degree of utilization both upon galvanostatic SOFC and SOEC testing, and load cycling operation. Long-term degradation tests were performed at 700°C during constant galvanostatic SOFC (250 h) and SOEC (250 h) conditions followed by load cycling operation (up to 1000 h) in cycles of 16 h SOFC and 8 h SOEC. Applied current densities were 0.6 A/cm2 and -1.2 A/cm2; and 0.4 A/cm2 and -0.6 A/cm2; inlet gas composition i.e. p(H2O)/p(H2) of 90/10 and dry H2, as well as a test applying p(H2O)/p(H2) of 50/50 for both modes. Furthermore, two different utilization degrees (80% and 40%) were applied. From these tests it is evident that the high current density is detrimental for the fuel electrode durability while high p(H2O) does not seem problematic and cells sustained mechanical integrity upon load cycling.

AB - Four single cell rSOC tests were conducted to investigate the effect of current density, steam content and degree of utilization both upon galvanostatic SOFC and SOEC testing, and load cycling operation. Long-term degradation tests were performed at 700°C during constant galvanostatic SOFC (250 h) and SOEC (250 h) conditions followed by load cycling operation (up to 1000 h) in cycles of 16 h SOFC and 8 h SOEC. Applied current densities were 0.6 A/cm2 and -1.2 A/cm2; and 0.4 A/cm2 and -0.6 A/cm2; inlet gas composition i.e. p(H2O)/p(H2) of 90/10 and dry H2, as well as a test applying p(H2O)/p(H2) of 50/50 for both modes. Furthermore, two different utilization degrees (80% and 40%) were applied. From these tests it is evident that the high current density is detrimental for the fuel electrode durability while high p(H2O) does not seem problematic and cells sustained mechanical integrity upon load cycling.

U2 - 10.1149/10301.0437ecst

DO - 10.1149/10301.0437ecst

M3 - Conference article

VL - 103

SP - 437

EP - 450

JO - E C S Transactions

JF - E C S Transactions

SN - 1938-5862

IS - 1

T2 - 17th International Symposium on Solid Oxide Fuel Cells

Y2 - 18 July 2021 through 23 July 2021

ER -

Load cycling tests of reversible solid oxide cells - Effects of current density, steam content and utilization

Abstract

Conference

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