Solid Oxide Development Status at DTU Energy

Abstract

Solid oxide fuel cells and electrolysis (SOFC, SOE = SOC) are efficient technologies to link together energy sectors such as power, gas, and heat. They can thus emerge as key technologies in the current energy transitions towards systems based on renewable energy sources. DTU Energy has a long history of research in the areas of SOC and has currently an effort of ca. 35 person-years per year. The presentation will introduce the recent achievements ranging from materials development, cell & stack development, and advanced diagnostics to system analysis and modelling. Examples are significantly improved cells based on state-of-the-art, metal supported cell types, use of alternative fuels such as ammonia and biogas, stack and stack component development, and increased basic understanding aided by phase-field and multiphysics modelling. 10.1149/09101.0235ecst ©The Electrochemical Society ECS Transactions, 91 (1) 235-245 (2019) 235 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 192.38.90.17 Downloaded on 2019-09-04 to IP ECS Transactions, 91 (1) 235-245 (2019) 244 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 192.38.90.17 Downloaded on 2019-09-04 to IP

Study of solid oxide electrolysis cells operated in potentiostatic mode: Effect of operating temperature on durability

“…The long-term durability of SOECs and stacks has been extensively investigated in the past couple of decades. Most of the previously conducted long-term tests were carried out in galvanostatic mode [13][14][15][16][17][18] , i.e. current is kept constant while voltage is changing due to degradation or activation.…”

NH3-Fed Patterned Electrode Solid Oxide Fuel Cell: Experimental Performance Characterization and Elementary Reaction Modeling

“…They observed that the performance of the NH 3fed SOFC was similar to that of the H 2 -fed SOFC. In other SOFC configurations, similar phenomena can also be observed (10)(11)(12)(13)(14). Although past experimental results have proven that NH 3 and H 2 have similar electrochemical performance in SOFCs, more in-depth kinetics research on NH 3 -fed SOFCs is urgently needed.…”

Progress in metal-supported solid oxide electrolysis cells: A review

“…For example, utilizing variable resources such as wind and solar to provide low-cost and renewable electricity to drive electrolysis is desirable, but inherently leads to transient operation of the electrolysis device. Large changes in current or voltage can be tolerated by conventional SOECs [24], but rapid thermal transients are expected to be damaging. Temperature excursions can occur as instantaneous or daily variation in the electrical input and cause the SOEC to operate away from the thermo-neutral point in endothermic or exothermic regimes.…”