CGO-Infiltrated Ni/YSZ SOEC Fuel Electrodes for Increased Carbon Tolerance during CO2Electrolysis

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

Solid Oxide Electrolysis Cells (SOEC) have the ability to operate as CO2 electrolysis cells, reducing CO2 to CO. Applying SOEC for CO2 electrolysis should be done carefully, since processes including carbon deposition lead to decreased life-time. This study is investigating the effect of the fuel electrode overpotential on carbon deposition in the Ni/YSZ fuel electrode, and the effects of CGO infiltration of the fuel electrode on carbon deposition, on performance during CO2 electrolysis. Long-term durability test shows an increase in degradation rate from 252 mV/kh to 467 mV/kh over a ∼50 h period at ∼1375 mV. The carbon deposition threshold is investigated through the potential-current response, where a bend around 1375 mV in the iV-curve led to a hysteresis effect. Raman spectroscopy of the long-term tested cell shows carbon deposition; the largest quantities are found near the fuel gas inlet and the amount decreases along the gas flow direction.
Original languageEnglish
JournalECS Transactions
Volume103
Issue number1
Pages (from-to)1945-1954
Number of pages10
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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