Stability and robustness of metal-supported SOFCs

Tucker, Michael C.; Lau, Grace Y.; Jacobson, Craig P.; DeJonghe, Lutgard C.; Visco, Steven J.

doi:10.1016/j.jpowsour.2007.09.032

Cited by 153 publications

(114 citation statements)

References 8 publications

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“…For an equal molarity, the ratio of LSM to Ni deposited per each impregnation step is ∼4.5:1, thus requiring multiple impregnation steps for Ni. Furthermore, metal anode electrocatalysts do not wet YSZ as well as oxide electrocatalysts do, and tend to coarsen, making it even more difficult to maintain a connected infiltrated network [28].…”

Section: Molten Salt + Surfactant-composite Electrodesmentioning

confidence: 99%

“…There are several benefits to the mSOFC design: significant decrease in cost by substituting expensive ceramics with cheap metal components such as FeCr steels, vastly increased robustness provided by the metal support, reduction-oxidation tolerance, the ability to sustain rapid thermal cycling, the ability to braze seals, etc [28,[30][31][32][33][34]. Infiltrating the catalysts after the high temperature sintering and brazing steps avoids undesirable decomposition of LSM, Ni coarsening and interdiffusion between Ni catalyst and FeCr in the support.…”

Section: Important Applicationsmentioning

confidence: 99%

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Synthesis of Dispersed and Contiguous Nanoparticles in Solid Oxide Fuel Cell Electrodes

et al. 2008

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Solid oxide fuel cell (SOFC) electrodes, after their high temperature sintering, may be impregnated (infiltrated) to deposit nanoparticles within their pores. There are two main motivations for modifying the electrodes: (i) to add catalytic function, and (ii) to enhance electronic or ionic conduction pathways, since either or both may not be sufficient within the as‐sintered electrodes. The impregnated particles take on two configurations: dispersed or connected. While dispersed nanoparticles introduce catalysts, connected nanoparticulate networks can add conduction paths in addition to enhancing catalysis. This paper reviews the prevalent SOFC electrode types, the function of the impregnated nanoparticles, and the common impregnation methods. Specific attention is given to the optimal uses of each method, with positives and negatives addressed for each.

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Section: Molten Salt + Surfactant-composite Electrodesmentioning

confidence: 99%

Section: Important Applicationsmentioning

confidence: 99%

Synthesis of Dispersed and Contiguous Nanoparticles in Solid Oxide Fuel Cell Electrodes

et al. 2008

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“…One of the most important issues is the densification of the electrolyte layer that normally requires high sintering temperatures (normally >1,200°C for YSZ-based electrolytes), which in oxidizing atmosphere leads to serious corrosion of the metallic substrate. To solve the problem, different processing routes to fabricate electrodes and dense electrolytes on metallic supports have been employed, such as atmospheric plasma spray processing (APS) [3,4], vacuum plasma spraying (VPS) [5][6][7], pulsed laser deposition (PLD) [8], electrophoretic deposition (EPD) [9], and high temperature sintering in reducing atmosphere [1,[10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…However, the power output of a cell with infiltrated Ni anode degraded rapidly during initial operation. This degradation was attributed primarily to coarsening of the fine infiltrated Ni particles [11]. It has been demonstrated that it is possible to improve the performance for hydrogen oxidation by several orders of magnitude through surfactant-assisted infiltration of a Gd-doped ceria phase (CGO) into an electronically conductive backbone phase consisting of Nb-doped SrTiO 3 (STN), which after low-temperature calcination form nanosized CGO particles on the surface of the electronically conductive backbone structure [16].…”

Section: Introductionmentioning

confidence: 99%

Planar Metal‐Supported SOFC with Novel Cermet Anode

et al. 2011

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Metal‐supported solid oxide fuel cells are expected to offer several potential advantages over conventional anode (Ni‐YSZ) supported cells. For example, increased resistance against mechanical and thermal stresses and a reduction in material costs. When Ni‐YSZ based anodes are used in metal supported SOFC, elements from the active anode layer may inter‐diffuse with the metallic support during sintering. This work illustrates how the inter‐diffusion problem can be circumvented by using an alternative anode design based on porous and electronically conducting layers, into which electrocatalytically active materials are infiltrated after sintering. The paper presents the electrochemical performance and durability of the novel planar metal‐supported SOFC design. The electrode performance on symmetrical cells has also been evaluated. The novel cell and anode design shows a promising performance and durability at a broad range of temperatures and is especially suitable for intermediate temperature operation at around 650 °C.

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“…Toward lowering operation temperatures, there is a tendency to shift ceramic-supported SOFCs to metal-supported SOFCs due to the potential benefits of low cost, high strength, better workability, good thermal conductivity and quicker start-up [12][13][14]. Quicker start-up and thermal cycling are considered as the main causes of ceramic-supported SOFC breakage and stack failure [15,16].…”

Section: Introductionmentioning

confidence: 99%