Cu and Y doped (Co, Mn)3O4 spinel coatings on Crofer ferritic alloy by composite electrodeposition

Ma, Zhang-Bo; Wang, Meihua; Zhang, Yuan-Shuo; Li, Kun; Zhang, Mingang; Yang, Wen

doi:10.1016/j.vacuum.2022.111352

Cited by 12 publications

(2 citation statements)

References 47 publications

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“…The Fe peaks can be observed in the EDS line scan of the coating region, showing Fe was expelled out from the substrate alloy to the coating region. In previous studies, 47,48 Fe peaks were also observed in the coating region. This is because the coating application may change the surface oxygen partial pressure during the coating formation process, which is beneficial to the formation of Ferich oxides.…”

Section: ■ Experimental Sectionmentioning

confidence: 75%

Metallic Co with Reactive Element Oxide Composite Coatings for Solid Oxide Fuel Cell Interconnect Applications

Zhang,

Shi,

Chen

et al. 2023

Energy Fuels

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Metallic Co with CeO 2 , La 2 O 3 , and Y 2 O 3 reactive element oxides is prepared on Fe−17Cr alloys by electroplating for solid oxide fuel cell interconnect applications, followed by cyclic oxidation in air at 750 °C for 500 h. All three thermally converted Co 3 O 4 spinel with reactive element oxide composite coatings significantly enhance the substrate alloy high-temperature oxidation resistance, and no further migration of chromium is detected in the coating region. Among the three coatings, the Co/ CeO 2 coating has the best performance after oxidation for 500 h as a result of the slowest oxidation constant rate [8.787 × 10 −16 (100−500 h)] and the lowest area specific resistance (12 mΩ cm 2 at 750 °C).

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Section: ■ Experimental Sectionmentioning

confidence: 75%

Metallic Co with Reactive Element Oxide Composite Coatings for Solid Oxide Fuel Cell Interconnect Applications

Zhang,

Shi,

Chen

et al. 2023

Energy Fuels

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“…To overcome the above defects, protective coatings are often prepared on the surface of the FSS substrate to prevent the "Cr poisoning" of the cathodic, as well as improve the oxidation resistance and the conductivity of the SOFC. Among the protective coatings, Co-Mn spinel coatings have been paid more attention attributed to their high density, simple prepare methods and good electrical property et al [8,9].…”

Section: Introductionmentioning

confidence: 99%

Influences of Composite Electrodeposition Parameters on the Properties of Ni-Doped Co-Mn Composite Spinel Coatings

Tong,

Wang,

Leng

et al. 2024

Materials

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To enhance the comprehensive performance of solid oxide fuel cells (SOFCs) ferritic stainless steel (FSS) interconnectors, a novel approach involving composite electrodeposition and thermal conversion is proposed to prepare Ni-doped Co-Mn composite spinel protective coatings on FSS surfaces. The process involves the composite electrodeposition of a Ni-doped Co-Mn precursor coating, followed by thermal conversion to obtain the Co-Mn-Ni composite spinel coating. Crofer 22H was used as the substrate and orthogonal experiments were designed to investigate the influences of deposition solution pH, stirring rate, cathode current density, and the element content of Mn and Ni on the surface morphology and properties of the composite coatings, respectively. The characterization of the prepared coatings was conducted through macroscopic and microscopic morphology observations of the component surface, energy dispersive spectroscopy (EDS) analysis, and area specific resistance (ASR) testing, etc. Finally, the optimized composite electrodeposition parameters and the Mn-Ni content ratio in the solution were obtained. Experimental results indicated that the composite spinel coating prepared with the optimized process parameters exhibited excellent adhesion to the substrate, and the diffusion and migration of Cr element has been effectively inhibited. Compared with the substrate, the ASR of the coated components has also been decreased simultaneously, which provided an effective method for the surface modification of SOFC FSS interconnectors.

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Effect of Rare Earth Y and Metal X (Co, Mn, Ni, Cu) Elements on Cr Diffusion Behavior of SOFC Metallic Interconnect

Li,

Zhang,

Liu

et al. 2024

Surface & Interface Analysis

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At present, the metallic interconnects of the solid oxide fuel cell (SOFC) can result in Cr poisoning problem of cathode after long‐term high‐temperature oxidation. Such problem seriously affects the efficiency of battery power generation. In order to optimize the performance of the metallic interconnect, this paper firstly studies the doping effect of rare earth element Y and metal element X (Co, Mn, Ni, Cu) on the diffusion behavior of Cr at the FeCr/Cr2O3 interface by the first principles method. The Cr diffusion pathway and energy barriers under different elemental doping models are calculated by CI‐NEB method. Based upon the theoretical results, the Mn1.8CoY0.2O4 spinel coating is further deposited on the surface of Crofer 22 APU substrate by sol–gel and electrophoretic deposition method to verify the theoretical results. The performance of the coating samples after high‐temperature oxidation are tested and analyzed. The experimental results show that the Mn1.8CoY0.2O4 spinel coating significantly improves the high‐temperature antioxidation, Cr resistance performance, and electrical conductivity of the interconnect, providing a feasible solution for solving the Cr poisoning problem in cathode and accelerating the application of Crofer 22 APU alloy materials in SOFC metallic interconnects.

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Cu and Y doped (Co, Mn)3O4 spinel coatings on Crofer ferritic alloy by composite electrodeposition

Cited by 12 publications

References 47 publications

Metallic Co with Reactive Element Oxide Composite Coatings for Solid Oxide Fuel Cell Interconnect Applications

Metallic Co with Reactive Element Oxide Composite Coatings for Solid Oxide Fuel Cell Interconnect Applications

Influences of Composite Electrodeposition Parameters on the Properties of Ni-Doped Co-Mn Composite Spinel Coatings

Effect of Rare Earth Y and Metal X (Co, Mn, Ni, Cu) Elements on Cr Diffusion Behavior of SOFC Metallic Interconnect

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