Impact of Protective and Contacting Layers on the Long‐Term SOFC Operation

Kusnezoff, Mihails; Sauchuk, Viktar; Girdauskaite, E.; Beckert, W.; Reinert, Andreas

doi:10.1002/9780470584316.ch7

Cited by 3 publications

(3 citation statements)

References 17 publications

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“…Conductivity and Area Specific Resistance. CuNiMn oxide spinel (CNM) was found to be a promising protection layer material for SOFC interconnects (5). Due to good electrical conductivity of CNM at high temperature (> 100 S/cm at 850 °C) (6), this compound can also be used as the contact material for the cathode side of the SOFC cell.…”

Section: Development Of a Cathode Side Contactmentioning

confidence: 99%

“…Due to good electrical conductivity of CNM at high temperature (> 100 S/cm at 850 °C) (6), this compound can also be used as the contact material for the cathode side of the SOFC cell. The CNM powders have a low sintering temperature (<1,000 °C) (5). Therefore, the layer made from the CNM material can be applied by low cost deposition techniques like rollcoating or screen printing and then sintered and compacted during the stack joining.…”

Section: Development Of a Cathode Side Contactmentioning

confidence: 99%

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Long Term Performance of Stacks with Chromium-Based Interconnects (CFY)

Brandner¹,

Bienert²,

Kusnezoff

et al. 2013

ECS Trans.

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Chromium-based interconnects (CFY) in combination with electrolyte supported cells are perfectly matching the requirements of different SOFC applications. Furthermore, this type of stacks and the related manufacturing of cells and interconnects is already proven in very high volumes today. Plansee SE and Fraunhofer IKTS, together with partners in the SOFC20 project and lead customers, have developed the advanced MK351 stack-platform, which is now available for interested new customers. A suitable, well-adjusted combination of materials, especially regarding the cathode protection and contacting, has been developed. Sample test results have been verified in long term stack testing for more than 8,000 h. The stack has proven very low power degradation of less than 0.7 %/ 1,000 h.

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Section: Development Of a Cathode Side Contactmentioning

confidence: 99%

Section: Development Of a Cathode Side Contactmentioning

confidence: 99%

Long Term Performance of Stacks with Chromium-Based Interconnects (CFY)

Brandner¹,

Bienert²,

Kusnezoff

et al. 2013

ECS Trans.

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“…Good thermal and chemical compatibility have been demonstrated between the MCO spinel and the perovskite contact material. 2,19,156,[189][190][191][192] A major concern for any high temperature coating material system is the possible formation of a reaction layer between the coating and the thermallygrown Cr 2 O 3 scale. Such reaction layer might have completely different thermal expansion behaviors as well as electrical/mass transport properties, causing the degradation of the overall interconnect performance.…”

Section: Performance Of (Mnco) 3 O 4 Coatingsmentioning

confidence: 99%

Review—(Mn,Co)₃O₄-Based Spinels for SOFC Interconnect Coating Application

Zhu

Chesson

2021

J. Electrochem. Soc.

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With the reduction of solid oxide fuel cell (SOFC) operating temperature to the range of 600 °C–800 °C, Cr-containing ferritic alloys have become the preferred interconnect material, which unfortunately are susceptible to continuous scale growth and Cr volatility at the SOFC operating temperatures. The (Mn,Co)3O4 spinel system is widely regarded as the most effective coating for SOFC interconnect protection, due to its high thermal and electrical conductivity, adequate coefficient of thermal expansion, and excellent Cr blocking capability. This article reviews the physical and chemical properties of the (Mn,Co)3O4-based spinels; different types of coating precursors and deposition techniques; and the effects of spinel composition, quality and thickness on the coating performance. It is concluded that the spinel coating composition, quality, and thickness are more critical than the coating process in affecting the overall coating performance.

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