Advanced PVD protective coatings for SOFC interconnects

Gannon, Paul; Deibert, Max C.; White, Preston; Smith, Richard J.; Chen, Hui; Priyantha, W.; Lucas, J.; Gorokhovsky, V.

doi:10.1016/j.ijhydene.2007.12.009

Cited by 59 publications

(21 citation statements)

References 13 publications

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“…Hence, the application of coatings on the interconnect steel is widely discussed to mitigate Cr evaporation e.g. (10)(11)(12). Table I gives the composition of the investigated materials.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Nano-Coatings for SOFC Interconnects

Froitzheim¹,

Svensson²

2011

ECS Trans.

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Chromium evaporation from metallic interconnects in SOFCs is commonly poisoning the cathode of SOFCs. To reduce chromium evaporation, rather thick coatings have been deposited using various coating techniques. In this study a 22% Cr ferritic steel has been coated with multilayered nano coatings. The best coatings combine a Cr retention layer (800nm Co) with a 10nm layer of Ce that reduces the corrosion rate of the metallic interconnect. Such coatings might be a cost efficient way to meet the required lifetime targets for SOFC interconnects. The Cr evaporation measurements are carried out with a recently developed denuder technique which allows time resolved quantification of volatile chromium species. Downstream of the samples a denuder tube is placed which collects any CrO 2 (OH) 2 evaporating from the samples.

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“…Hence, the application of coatings on the interconnect steel is widely discussed to mitigate Cr evaporation e.g. (10)(11)(12). Table I gives the composition of the investigated materials.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Nano-Coatings for SOFC Interconnects

Froitzheim¹,

Svensson²

2011

ECS Trans.

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“…Coatings have demonstrated excellent thermal stability, low and stable ASR (\25 mX cm 2 for [1,500 h) and negligible Cr volatility at 800°C [22]. Figure 5 [22].…”

Section: Lafad Resultsmentioning

confidence: 99%

“…Prior to ASR measurements, both uncoated and coated FSS 430 specimens were pre-oxidised in air at 800°C for 100 h. Subsequent to varying exposure times, sample cross sections for microscopic analysis were prepared by epoxy-mounting, sectioning and polishing. Analytical techniques are described elsewhere [22].…”

Section: Coating Properties Characterisationmentioning

confidence: 99%

Interconnect materials for next-generation solid oxide fuel cells

et al. 2009

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Highly-efficient solid oxide fuel cell (SOFC) systems are gaining increased attention for future energy conversion applications. Many planar SOFC stack designs utilise ferritic stainless steel (FSS) interconnect components. During operation, surface corrosion of FSS interconnects degrades stack operation by increasing electrical resistance and introducing other deleterious material interactions. To minimise these effects, various surface modifications and coatings are currently under investigation. Two of these methods under development for this application are: metal organic chemical vapour deposition (MO-CVD); and, large area filtered arc deposition (LAFAD). SOFC interconnect-relevant corrosion behaviour of an MO-CVD coating on Crofer 22 APU, AL453, Fe30Cr and Haynes230, and complex, amorphous LAFAD AlCrCoMnTiYO coatings on FSS 430 were investigated. Both of these surface modifications and coatings exhibit significantly improved corrosion protection as compared with uncoated FSS samples

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“…Furthermore, solid oxide fuel cells with high energy conversion efficiency and low emission are expected to replace internal combustion engines in a near future [1]. One of the most important components of SOFC is interconnect that provides distribution of fuel and oxidant, while acting as the current collecting in SOFC stack [2].…”

Section: Introductionmentioning

confidence: 99%