LaNi0.6Co0 4O3− dip-coated on Fe–Cr mesh as a composite cathode contact material on intermediate solid oxide fuel cells

Morán-Ruiz, Aroa; Vidal, Karmele; Larrañaga, Aitor; Laguna‐Bercero, M. A.; Porras-Vázquez, José M.; Slater, Peter R.; Arriortua, Marı́a I.

doi:10.1016/j.jpowsour.2014.07.040

Cited by 21 publications

(9 citation statements)

References 49 publications

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“…Two peaks were identified for La, one at »833 eV which corresponds to La 3+ in perovskite [38] and, another at »834 eV which is assigned to La 3+ in La 2 O 3 [39].…”

Section: Original Research Papermentioning

confidence: 99%

Evaluation of Using LaNi_0.6Fe_0.4O_3–_δ Contact Layer Between La_0.6Sr_0.4FeO₃ Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells

et al. 2016

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Interconnect-cathode interfacial adhesion is important for the durability of solid oxide fuel cell (SOFC). Thus, the use of a conductive contact layer between interconnect and cathode could reduce the cell area specific resistance (ASR). The use of La 0.6 Sr 0.4 FeO 3 (LSF) cathode, LaNi 0.6 Fe 0.4 O 3-d (LNF) contact layer and Crofer22APU interconnect was proposed as an alternative cathode side. LNF-LSF powder mixtures were heated at 800°C for 1,000 h and at 1,050°C for 2 h and analyzed by X-Ray power diffraction (XRD). The results indicated a low reactivity between the materials. The degradation occurring between the components of the half-cell (LSF/ LNF/Crofer22APU) was studied. XRD results indicated the formation of secondary phases, mainly: SrCrO 4 , A(B, Cr)O 3 (A = La, Sr; B = Ni, Fe) and SrFe 12 O 19 . Scanning electron microscopy with energy dispersive X-Ray spectroscopy (SEM-EDX) and the X-Ray photoelectron spectroscopy (XPS) analyzes confirmed the interaction between LSF/LNF and the metallic interconnect due to the Cr vaporization/migration. An increment of the resistance of~0.007 Ω cm 2 in 1,000 h is observed for (LSF/LNF/Crofer22APU) sample. However, the ASR values of the cell without contact coating, (LSF/Crofer22APU), were higher (0.31(1) Ω cm 2 ) than those of the system with LNF coated interconnect (0.054(7) Ω cm 2 ), which makes the proposed materials combination interesting for SOFC.

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“…Two peaks were identified for La, one at »833 eV which corresponds to La 3+ in perovskite [38] and, another at »834 eV which is assigned to La 3+ in La 2 O 3 [39].…”

Section: Original Research Papermentioning

confidence: 99%

Evaluation of Using LaNi_0.6Fe_0.4O_3–_δ Contact Layer Between La_0.6Sr_0.4FeO₃ Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells

et al. 2016

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“…1 Co 2 O 4 nanosized coated La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 powders, 12 superconducting materials of YBa 2 Cu 3 O 7− x , 13 LaNi 0.6 Fe 0.4 O 3 and La 0.8 Sr 0.2 FeO 3 , 14 Mn‐Co and Ni–Co metal powders, 15 LaNi 0 . 6 Co 0.4 O 3− δ dip‐coated Fe–Ce mesh, 16 glass‐La 0.85 Sr 0.15 MnO 3 and glass‐Sm 0.5 Sr 0.5 O 3 composites, 17 spinel‐forming Cu–Mn metallic foam, 18 and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 –Cu 2 O composite 19 . The issues of cathode contact materials have also been discussed in review papers 20‐21 .…”

Section: Introductionmentioning

confidence: 99%

Thermal, mechanical, and electrical properties of LSCo/mullite composite contact materials for solid oxide fuel cells

Chou

Canfield

Bonnett

et al. 2020

Int J Applied Ceramic Tech

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Lanthanum strontium cobaltite (LSCo) is considered as a good candidate cathode contact material for solid oxide fuel cells, due to high electrical conductivity. However, LSCo has a very large coefficient of thermal expansion (CTE) than the cells and metallic interconnects. As a result, poor mechanical stability is expected during thermal cycling. To minimize the CTE mismatch, we investigate a composite approach involving mixing LSCo with an inert material of low CTE, such as mullite at volume fractions from 0.1 to 0.4. Composite's CTE shows a decreasing trend with increasing mullite volume fractions and is consistent with model predictions. X‐ray powder diffraction analysis of sintered LSCo/mullite composites exhibits no presence of other phases for samples aged for 500 hours at 800°C, indicating chemical compatibility. Electrical conductivity by a 4‐pt method shows a decreasing trend with increasing mullite content. Contact strength of as‐sintered and thermally cycled samples show that only the composite with 0.4 volume fraction has a measurable strength; the other composites have no strength. Overall, the composite approach is demonstrated in the LSCo/mullite system to lower the CTE and hence achieve thermal cycle stability. The addition of the inert phase to the LSCo matrix, however, also reduces the electrical conductivity.

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“…For the fuel side, Ni-based meshes may be used as suggested in [14,15]. For the oxidant side, FSS are more attractive due to the better oxidation resistance [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…The process allows for fast deposition and good control of coating thickness [24]. EPD is less dependent on line-of-sight compared to other slurry-based methods such as spraying, sputtering and dip-coating [17], making it an attractive method for depositing MCO on complex shaped structures. Although the potential to coat a steel mesh by EPD has been demonstrated [25], most of the work on EPD of MCO coatings has been made on flat steel sheets [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Investigation of electrophoretic deposition as a method for coating complex shaped steel parts in solid oxide cell stacks

Talic

Wulff

Molin

et al. 2019

Surface and Coatings Technology

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Electrophoretic deposition (EPD) is a promising method for coating complex shaped interconnects and contact components for solid oxide fuel cells and electrolyzers. In this work, we employ a combination of finite element modelling and experiments to assess the effect of substrate curvature on the fabrication of a Mn1.5Co1.5O4 coating by EPD. The coating is deposited on steel substrates machined to create a well-defined curvature and on a Crofer 22 H steel grid. We find that post-deposition sintering of the coated steel substrate may lead to crack formation in concave surfaces, while a defect-free coating is achieved at convex surfaces. The formation of cracks is found to depend on a complex interplay between the coating thickness, the sintering procedure, and the substrate curvature radius. Oxidation testing in air at 750 °C showed that the Mn1.5Co1.5O4 coating reduced the oxidation rate of the Crofer 22 H steel grid. Sintering the coating by a two-step reduction and re-oxidation procedure resulted in a more protective coating showing a greater tendency for crack healing compared to sintering the coating in air only.

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LaNi0.6Co0 4O3− dip-coated on Fe–Cr mesh as a composite cathode contact material on intermediate solid oxide fuel cells

Cited by 21 publications

References 49 publications

Evaluation of Using LaNi_0.6Fe_0.4O_3–_δ Contact Layer Between La_0.6Sr_0.4FeO₃ Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells

Evaluation of Using LaNi_0.6Fe_0.4O_3–_δ Contact Layer Between La_0.6Sr_0.4FeO₃ Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells

Thermal, mechanical, and electrical properties of LSCo/mullite composite contact materials for solid oxide fuel cells

Investigation of electrophoretic deposition as a method for coating complex shaped steel parts in solid oxide cell stacks

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LaNi0.6Co0 4O3− dip-coated on Fe–Cr mesh as a composite cathode contact material on intermediate solid oxide fuel cells

Cited by 21 publications

References 49 publications

Evaluation of Using LaNi0.6Fe0.4O3–δ Contact Layer Between La0.6Sr0.4FeO3 Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells

Evaluation of Using LaNi0.6Fe0.4O3–δ Contact Layer Between La0.6Sr0.4FeO3 Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells

Thermal, mechanical, and electrical properties of LSCo/mullite composite contact materials for solid oxide fuel cells

Investigation of electrophoretic deposition as a method for coating complex shaped steel parts in solid oxide cell stacks

Contact Info

Product

Resources

About

Evaluation of Using LaNi_0.6Fe_0.4O_3–_δ Contact Layer Between La_0.6Sr_0.4FeO₃ Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells

Evaluation of Using LaNi_0.6Fe_0.4O_3–_δ Contact Layer Between La_0.6Sr_0.4FeO₃ Cathode and Crofer22APU Interconnect for Solid Oxide Fuel Cells