A Decade of Solid Oxide Electrolysis Improvements at DTU Energy

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Solid oxide electrolysis cells (SOECs) can efficiently convert electrical energy (e.g. surplus wind power) to energy stored in fuels such as hydrogen or other synthetic fuels. Performance and durability of the SOEC has increased orders of magnitudes within the last decade. This paper presents a short review of the R&D work on SOEC single cells conducted at DTU Energy from 2005 to 2015. The SOEC improvements have involved increasing the of the oxygen electrode performance, elimination of impurities in the feed streams, optimization of processing routes, and fuel electrode structure optimization. All together, these improvements have led to a decrease in long-term degradation rate from ∼40 %/kh to ∼0.4 %/kh for steam electrolysis at -1 A/cm2, while the initial area specific resistance has been decreased from 0.44 Ωcm2 to 0.15 Ωcm2 at -0.5 A/cm2 and 750 °C.
Original languageEnglish
JournalECS Transactions
Issue number42
Pages (from-to)3-14
Number of pages12
Publication statusPublished - 2017
EventPRiME 2016/230th ECS Meeting - Honolulu, United States
Duration: 2 Oct 20167 Oct 2016


ConferencePRiME 2016/230th ECS Meeting
CountryUnited States
Internet address

Bibliographical note

doi: 10.1149/07542.0003ecst

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