Evaluation of La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 protective coating on ferritic stainless steel interconnect for SOFC application

Lenka, R.K.; Patro, P.K.; Sharma, Jyothi; Mahata, T.; Sinha, Pankaj

doi:10.1016/j.ijhydene.2016.08.143

Cited by 20 publications

(5 citation statements)

References 31 publications

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“…A (La,Sr)CrO 3 coating layer was also reported to have good adhesion to the interconnect and acceptable ASR . Recently, La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 has been explored as a possible protective coating with ASR as low as 2.0 mΩ·cm 2 and 2–3 μm thick of chromia scale on steel substrate after 300 h of exposure in moist oxygen . AB 2 O 4 spinel materials are attracting more and more attention now.…”

Section: Introductionmentioning

confidence: 99%

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Shen

2017

ACS Appl. Mater. Interfaces

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In this work, a novel Co/Sm-doped CeO (SDC)/Co trilayer of ∼6 μm is deposited by alternating electrodeposition and electrophoresis and oxidized to a CoO/SDC/CoO trilayer structure. This coating is unique and effective in the following aspects: (1) The area specific resistance of the coated interconnect is more stable and lower than that of the uncoated interconnect after thermal treatment at 800 °C for 400 h. (2) The CoO/SDC/CoO coating layer can effectively inhibit Cr diffusion and evaporation and significantly slow the oxidation rate of the interconnect. (3) The SmSrCoFeO cathode in the electrolyte/cathode/interconnect half-cell retains its initial stoichiometry after 100 h of the thermal treatment. Subsequently, the ohmic resistance R, high frequency polarization resistance R, and low frequency polarization resistance R of the half-cell with the CoO/SDC/CoO coated interconnect are all smaller than those of the half-cell with the bare interconnect. The CoO/SDC/CoO coating layer has great advantages to be used as a protective layer for the metallic interconnect in solid oxide fuel cells to improve cell performance, stability, and durability.

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Section: Introductionmentioning

confidence: 99%

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Shen

2017

ACS Appl. Mater. Interfaces

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“…Manganese cobalt oxide (MCO) coatings have been extensively researched for this purpose. MCO coatings can be deposited using various techniques such as electrophoretic deposition(4), electroplating(5), screen printing (6), inkjet printing (7), and atmospheric plasma spraying (8). MCO can also be applied by depositing a metallic Co coating via physical vapour deposition (PVD), which can be manufactured in large-scale roll-to-roll coating (9).…”

Section: Introductionmentioning

confidence: 99%

Strategies to Improve the Effectiveness of the Thin Film Coated Interconnects

Reddy,

Almyren,

Svensson

et al. 2023

ECS Trans.

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Ferritic stainless steels are used as interconnect materials in solid oxide cells (SOFC/SOEC). To enhance their performance and extend the lifespan of SOC’s, FSS interconnects are typically coated with protective coatings. MCO coatings deposited through physical vapor deposition have been extensively studied for this purpose. However, most studies have been conducted on in isothermal conditions which do not reflect the conditions experienced in stacks. Stacks are typically conditioned at high temperatures, usually 100-250°C above the operating temperatures, to ensure gas tightness. Thus, it is important to understand the influence of pre-oxidation on behaviour of the interconnect. The influence of pre-oxidation on Ce/Co-coated Crofer 22 APU and AISI 441 is studied at 850°C in air. The samples are characterised using scanning electron microscopy. The oxidation behaviour of Ce/Co-coated Crofer 22 APU improved significantly upon pre-oxidation whereas only minimal effect was observed for Ce/Co-coated AISI 441.

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“…For more than a decade, ICs have been mainly made of ferritic stainless steels (FSSs). In fact, after the successful reduction of SOFC operation temperature in the range 650 • C to 850 • C, this class of materials was selected among others (e.g., chromium-based alloys and Ni-Cr based alloys) to replace LaCrO 3 -based interconnects since it exhibits adequate application characteristics: a thermal expansion coefficient (TEC) similar to the other ceramic parts of the fuel cell (11.5-14.0 × 10 −6 /K from RT to 800 • C), good thermal and electrical conductivity, good manufacturability and mechanical properties, easy fabricability, affordable cost and, in the case of chromia-former steels containing over 16 wt.% Cr, the formation of a comparatively conductive and protective Cr 2 O 3 scale in presence of an oxidizing atmosphere [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

On the High-Temperature Oxidation and Area Specific Resistance of New Commercial Ferritic Stainless Steels

Bongiorno

Spotorno

Paravidino

et al. 2021

Metals

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Two commercial ferritic stainless steels (FSSs), referred to as Steel A and Steel B, designed for specific high-temperature applications, were tested in static air for 2000 h at 750 °C to evaluate their potential as base materials for interconnects (ICs) in Intermediate Temperature Solid Oxide Fuel Cell stacks (IT-SOFCs). Their oxidation behavior was studied through weight gain and Area Specific Resistance (ASR) measurements. Additionally, the oxide scales developed on their surfaces were characterized by X-Ray Diffraction (XRD), Micro-Raman Spectroscopy (μ-RS), Scanning Electron Microscopy, and Energy Dispersive X-Ray Fluorescence Spectroscopy (SEM-EDS). The evolution of oxide composition, structure, and electrical conductivity in response to aging was determined. Comparing the results with those on AISI 441 FSS, steels A and B showed a comparable weight gain but higher ASR values that are required by the application. According to the authors, Steel A and B compositions need an adjustment (i.e., a plain substitution of the elements which form insulant oxides or a marginal modification in their content) to form a thermally grown oxide (TGO) with the acceptable ASR level.

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Evaluation of La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 protective coating on ferritic stainless steel interconnect for SOFC application

Cited by 20 publications

References 31 publications

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Strategies to Improve the Effectiveness of the Thin Film Coated Interconnects

On the High-Temperature Oxidation and Area Specific Resistance of New Commercial Ferritic Stainless Steels

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Evaluation of La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 protective coating on ferritic stainless steel interconnect for SOFC application

Cited by 20 publications

References 31 publications

Co3O4/Sm-Doped CeO2/Co3O4 Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Co3O4/Sm-Doped CeO2/Co3O4 Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Strategies to Improve the Effectiveness of the Thin Film Coated Interconnects

On the High-Temperature Oxidation and Area Specific Resistance of New Commercial Ferritic Stainless Steels

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Product

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Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells

Co₃O₄/Sm-Doped CeO₂/Co₃O₄ Trilayer Coating on AISI 441 Interconnect for Solid Oxide Fuel Cells