Novel coatings for protecting solid oxide fuel cell interconnects against the dual-atmosphere effect

Tomas, M.; Visibile, Alberto; Svensson, Jan‐Erik; Froitzheim, Jan

doi:10.1016/j.ijhydene.2023.01.313

Cited by 10 publications

(5 citation statements)

References 50 publications

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“…This will be compared with a rather stack-like contacting with different MICs and the application of a cerium cobalt (CeCo) protective coating (6,28,29) by IV-characteristics and electrochemical impedance measurements (EIS). Based on a method by Kornely et al (30) the contact loss is experimentally and individually determined at fuel and air side by targeted measurements of potential probes.…”

Section: Introductionmentioning

confidence: 99%

From Ideal to Stack-like Contacting of an SOC

et al. 2023

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The performance of an SOC depends on the testing environment. Regarding single cell tests with ideal contacting (gold and nickel meshes) and inert flow fields (Al2O3), the performance is limited by the intrinsic losses in the cell as contact losses and any poisoning effects are minimized. In an SOC-stack exhibiting metallic interconnectors, the performance is furthermore affected by contact resistances and limitations in gas supply. In this contribution single cell testing is extended to a stack-like contacting applying three different metallic interconnectors (Crofer 22 APU, ASTM 441 and UNS S44330) with and without a cerium-cobalt PVD-coating. Cell performance and losses are analyzed by IV-characteristics, impedance spectroscopy and DRT analysis. For all uncoated interconnectors, significant performance losses due to increased contact losses and air electrode polarization were observed. With the CeCo-coating losses could be drastically reduced leading to a cell performance close to the ideal case for all three steel grades.

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Section: Introductionmentioning

confidence: 99%

From Ideal to Stack-like Contacting of an SOC

et al. 2023

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“…Recently, the trend in the intermediate temperature operation of SOFCs (600-800 • C) by decreasing the thickness of the ceramic electrolyte makes it feasible to use metallic interconnects [6][7][8]. Ferritic stainless steels (FSSs), such as SUS430 and Crofer22, are currently considered to be the most promising metallic interconnect material due to their high electrical and thermal conductivity, easy manufacture, and low cost [9][10][11]. FSSs possess good oxidation resistance, owing to the formation of Cr 2 O 3 scales in SOFC environments.…”

Section: Introductionmentioning

confidence: 99%

The Preparation and Properties of Ti(Nb)-Si-C Coating on the Pre-Oxidized Ferritic Stainless Steel for Solid Oxide Fuel Cell Interconnect

Li,

Chi,

Wei

et al. 2024

Materials

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Cr2O3 scale growth and volatilization are the main cause of the performance degradation of solid oxide fuel cells (SOFCs) with an Fe-based ferritic stainless steel (FSS) interconnect. In this work, an amorphous Ti(Nb)-Si-C coating is prepared on the pre-oxidized SUS430 with D.C. magnetron sputtering as the protective coating. The amorphous Ti(Nb)-Si-C coated alloy exhibits significantly enhanced oxidation resistance, and the oxidation kinetics obey the parabolic law with a low parabolic rate of 9.36 × 10−15 g2·cm−4·s−1. A dual-layer oxide scale is formed composed of an inner layer rich in Cr2O3 and an outer layer rich in rutile TiO2 and amorphous SiO2. MnCr2O4 appears at the interface between the inner and outer oxide layers. Meanwhile, the amorphous Ti(Nb)-Si-C coating also effectively blocks the outward diffusion of Cr. In addition, the coated steel presents good electrical properties with an area-specific resistance (ASR) of 13.57 mΩ·cm2 at 800 °C after oxidation at 800 °C in air for 500 h.

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“…In the FSS matrix, grain boundary is the preferred channel for Cr element diffusion. Smaller grain sizes tend to promote the outward diffusion of Cr, resulting in faster formation of chromia scale [ 38 ]. Chyrkin et al [ 39 ] investigated the high-temperature oxidation behavior of additively manufactured (AM) Ni-based alloy IN625.…”

Section: Introductionmentioning

confidence: 99%

Initial stage oxidation corrosion of commercial ferritic stainless steels with different Cr contents at 650 °C for solid oxide fuel cells

Mao,

Wang,

Chen

et al. 2024

Heliyon

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Novel coatings for protecting solid oxide fuel cell interconnects against the dual-atmosphere effect

Cited by 10 publications

References 50 publications

From Ideal to Stack-like Contacting of an SOC

From Ideal to Stack-like Contacting of an SOC

The Preparation and Properties of Ti(Nb)-Si-C Coating on the Pre-Oxidized Ferritic Stainless Steel for Solid Oxide Fuel Cell Interconnect

Initial stage oxidation corrosion of commercial ferritic stainless steels with different Cr contents at 650 °C for solid oxide fuel cells

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