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 journalConference articleResearchpeer-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 languageEnglish
JournalECS Transactions
Volume103
Issue number1
Pages (from-to)437-450
Number of pages14
ISSN1938-5862
DOIs
Publication statusPublished - 2021
Event17th International Symposium on Solid Oxide Fuel Cells - Stockholm, Sweden
Duration: 18 Jul 202123 Jul 2021
Conference number: 17

Conference

Conference17th International Symposium on Solid Oxide Fuel Cells
Number17
Country/TerritorySweden
CityStockholm
Period18/07/202123/07/2021

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