Cathode-side electrical contact and contact materials for solid oxide fuel cell stacking: A review

Zhu, J.H.; Ghezel-Ayagh, Hossein

doi:10.1016/j.ijhydene.2017.08.005

Cited by 64 publications

(32 citation statements)

References 143 publications

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“…In the latter, an external inert support may be used such as a porous ceramic material or the interconnect itself. Early tubular and planar cells were either cathode or electrolyte-supported but now the standard is anode-supported which allows for lower operating temperatures and ohmic [20][21][22][23][24][25]), ** ( [26,27]), *** ( [28][29][30]).…”

Section: Tubular Solid Oxide Fuel Cellsmentioning

confidence: 99%

“…As such, research and development into SOFCs, and specifically µT-SOFC technology, must address key bottlenecks to be competitive. The key areas for development in SOFCs are material development [20][21][22][23][24][25], current collection/interconnection, sealing [26,27] and stack/system design [28][29][30]. Tubular SOFC current collection/interconnection development is somewhat more geometry-specific than the other aforementioned bottlenecks versus planar designs and thus is the focus of this study.…”

Section: Introduction To Fuel Cell Technologymentioning

confidence: 99%

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The Development of Current Collection in Micro-Tubular Solid Oxide Fuel Cells—A Review

2021

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Micro-tubular solid oxide fuel cells (µT-SOFCs) are suited to a broad range of applications with power demands ranging from a few watts to several hundred watts. µT-SOFCs possess inherently favourable characteristics over alternate configurations such as high thermo-mechanical stability, high volumetric power density and rapid start-up times, lending them particular value for use in portable applications. Efficient current collection and interconnection constitute a bottleneck in the progression of the technology. The development of current collector designs and configuration reported in the literature since the inception of the technology are the focus of this study.

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Section: Tubular Solid Oxide Fuel Cellsmentioning

confidence: 99%

Section: Introduction To Fuel Cell Technologymentioning

confidence: 99%

The Development of Current Collection in Micro-Tubular Solid Oxide Fuel Cells—A Review

2021

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“…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 . As the contact material is required to conduct electrons while remaining in contact with cathode and coated interconnect plates, it needs to have high electrical conductivity, matching CTE, chemical compatibility, thermal stability, and reasonable mechanical strength.…”

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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“…In the development of a planar SOFC stack, each repeating unit is composed of an anode, electrolyte, cathode and interconnect [26,27]. Among the typical material choices, yttria stabilized zirconia (YSZ) is the most commonly used electrolyte for SOFCs because of its low cost, high ionic transference number in oxidizing and reducing atmospheres, and good chemical and mechanical properties [28e30].…”

Section: Introductionmentioning

confidence: 99%

SOFC cathodic layers using wet powder spraying technique with self synthesized nanopowders

Wain-Martin

Morán-Ruiz

Laguna‐Bercero

et al. 2019

International Journal of Hydrogen Energy

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Available online xxxKeywords: SOFC Wet powder spray Cathode Active layers Ball milling a b s t r a c t sIn this work, a wet powder spraying method has been investigated as a facile low cost route to deposit electrode layer on SOFC electrolyte support. A particular focus has been examining the interfacial stability of the deposited layers, and determining the influence of the thickness of the different layers, as well as the ball milling regime used to produce the electrode inks.The developed system consist of an yttria stabilized zirconia electrolyte support, a La 0.6 Sr 0.4 FeO 3 (LSF) cathode, a Sm 0.2 Ce 0.8 O 1.9 (SDC) barrier layer between the electrolyte and the cathode, and LaNi 0.6 Fe 0.4 O 3 (LNF) as a contact layer, for a future integration with the SOFC interconnector. The electrolyte supports (300 mm thickness and 9 mm diameter) supports were prepared by uniaxial pressing, while the deposition of thin barrier layers, cathode and contact layer were carried out by manual spray coating.Please cite this article as: Wain-Martin A et al., SOFC cathodic layers using wet powder spraying technique with self synthesized nanopowders, International Journal of Hydrogen Energy, https://doi.

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Cathode-side electrical contact and contact materials for solid oxide fuel cell stacking: A review

Cited by 64 publications

References 143 publications

The Development of Current Collection in Micro-Tubular Solid Oxide Fuel Cells—A Review

The Development of Current Collection in Micro-Tubular Solid Oxide Fuel Cells—A Review

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

SOFC cathodic layers using wet powder spraying technique with self synthesized nanopowders

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