Performance and Durability of Solid Oxide Electrolysis Cells for Syngas Production

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Performance and durability of Ni/YSZ based solid oxide electrolysis cells (SOECs) for co-electrolysis of H2O and CO2 at high current density were investigated. The cells consist of a Ni/YSZ support, a Ni/YSZ fuel electrode, a YSZ electrolyte, and a LSM-YSZ oxygen electrode. The cell durability was examined at 800°C and electrolysis current density of -1 or -1.5 A/cm2 with 60% reactant (H2O+CO2) utilization. The cell voltage degradation showed a strong dependence on the electrolysis current density, with an overall cell voltage degradation rate of 0.24 mV/h at -1 A/cm2 and of 0.82 mV/h at -1.5 A/cm2. Electrochemical characterization of the cells showed that the degradation was mainly related to the LSM/YSZ electrode when operated at -1 A/cm2, whereas at increased current density (-1.5 A/cm2), both the Ni/YSZ and LSM/YSZ electrodes showed degradation.
Original languageEnglish
JournalE C S Transactions
Issue number33
Pages (from-to)77-85
Publication statusPublished - 2012
Event220th ECS Meeting - Boston, MA, United States
Duration: 9 Oct 201114 Oct 2011
Conference number: 220


Conference220th ECS Meeting
Country/TerritoryUnited States
CityBoston, MA
Internet address


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