The Impact of Strong Cathodic Polarization on SOC Electrolyte Materials

Kosova Kreka, Karin Vels Hansen, Torben Jacobsen, Kion Norrman, Christodoulos Chatzichristodoulou, Mogens Bjerg Mogensen

Research output: Contribution to journalConference abstract in journalResearchpeer-review

Abstract

One of the most promising reversible energy conversion/storage technologies is that of Solid Oxide Fuel/Electrolysis Cells (SOFC/SOEC, collectively termed SOC). Long term durability is typically required for such devises to become economically feasible, hence considerable amount of work has and is being done on the degradation and long term durability of these systems. When using a SOC in electrolysis mode, it is economically beneficial to operate the cell at high current density, since it increases the fuel production rate. However, several degradation phenomena, such as segregation of impurities at the grain boundaries, electrode poisoning, delamination or cracks of the electrolyte etc., have been observed in cells operated at such conditions, lowering the lifetime of the cell1,2. High polarizations are observed at the electrolyte/cathode interface of an electrolysis cell operated at high current density. In case of a cell voltage above 1.6 V, p-type and n-type electronic conductivity are often observed at the anode and cathode respectively3. Hence, a considerable part of the current is lost as leakage through the electrolyte, thus lowering the efficiency of the cell considerably.
Original languageEnglish
Article number2863
JournalElectrochemical Society. Meeting Abstracts (Online)
VolumeMA2016-02
ISSN2151-2043
Publication statusPublished - 2016
EventPRiME 2016/230th ECS Meeting - Honolulu, United States
Duration: 2 Oct 20167 Oct 2016
http://prime-intl.org/

Conference

ConferencePRiME 2016/230th ECS Meeting
CountryUnited States
CityHonolulu
Period02/10/201607/10/2016
Internet address

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