Electrochemical performance of solid oxide fuel cells having electrolytes made by suspension and solution precursor plasma spraying

Marr, Michael; Kuhn, Joel; Metcalfe, Craig; Harris, Jeffrey; Kesler, Olivera

doi:10.1016/j.jpowsour.2013.06.092

Cited by 33 publications

(30 citation statements)

References 24 publications

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“…Electrochemical tests have shown that bending of the metal substrate during the high temperature electrolyte deposition is another issue which has a considerable effect on the gas tightness of the cell during operation of the SOFC. Nevertheless, these cells exhibit higher or similar OCVs when compared to other SOFCs manufactured using thermal spraying techniques and published in previous works (1,6,8,18). A comparison with state-of-the-art anode supported cells, which usually exhibit a one order of magnitude lower leakage, shows that a further improvement of the electrolyte layer properties is necessary and would be advantageous for the overall cell performance.…”

Section: Resultsmentioning

confidence: 52%

“…The porosity of these substrates was in the range 35-40%. These substrates have a significantly lower thickness as compared to the ones conventionally used by other groups in previous research for manufacturing SOFCs by thermal spraying (1,8). Due to the high heat flux imparted by the plasma jet, there is a quite high risk that these substrates bend during the coating deposition.…”

Section: Cell Fabricationmentioning

confidence: 99%

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Electrochemical Performance of Plasma Sprayed Metal Supported Planar Solid Oxide Fuel Cells

et al. 2015

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High production cost is one of the major barriers to widespread commercialization of solid oxide fuel cells (SOFCs). Thermal spray techniques are a low cost alternative for the production of SOFCs. The objective of this work was to evaluate the electrochemical performance of half-cells produced by plasma spraying. The anode was deposited on a porous metallic support by atmospheric plasma spraying (APS) whereas the electrolyte was deposited by plasma spray-thin film (PS-TF) technique which can produce thin and dense coatings at high deposition rates. The cathode was deposited by screen-printing. The electrochemical tests were performed at 650-800°C. Current-voltage characteristics and impedance spectra were measured and analyzed. The impact of electrolyte composition and layer thickness on the gas tightness of the electrolyte and the area specific resistance of the cell is discussed. The results show that the applied thermal spraying techniques are a potential alternative for producing SOFCs.

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Section: Resultsmentioning

confidence: 52%

Section: Cell Fabricationmentioning

confidence: 99%

Electrochemical Performance of Plasma Sprayed Metal Supported Planar Solid Oxide Fuel Cells

et al. 2015

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“…The different parameters linked to the suspension, and on which depend the quality of resulting coatings are the solvent, type and amount of dispersant, which increase improves the particle dispersion in the suspension and reduces the suspension viscosity, the viscosity, which for a solvent, can be increased by the addition of plasticizers with a low variation of surface tension (Ref 40,(42)(43)(44)(45). These parameters also modify the suspension atomization.…”

Section: Influence Of Suspension Characteristicsmentioning

confidence: 99%

What Do We Know, What are the Current Limitations of Suspension Plasma Spraying?

Fauchais¹,

Vardelle²,

Vardelle³

et al. 2015

J Therm Spray Tech

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Nano-structured coatings should exhibit better properties than micro-structured coatings because of a high volume fraction of internal interfaces. Since the mid-nineties a large body of works have been devoted to suspension and solution plasma spraying for the deposition of finely and even nanometerstructured coatings. The aim of this paper is to take stock of our present knowledge in the field of suspension plasma spraying that is, at the moment, essentially used for oxide ceramic coatings. It will first tackle the injection of the suspension in the plasma jet and the behavior of nano or sub-micro-meter particles processed in the plasma jet core involving the liquid breakup and vaporization that releases the solid particles from the solvent droplets. It will, then, deal with the plasma torches and liquid feeding systems available to suspension spraying. It will finally discuss the key characteristics of suspensions (solvent, dispersant, and particle morphologies), designing of coating microstructure, and potential industrial applications, with the developments requested to cope with these applications.

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“…Post-fabrication, the carbon was removed in an air atmosphere at 700°C, and the nickel oxide was reduced to nickel in a subsequent hydrogen atmosphere at 625°C. Dense electrolytes were made using a high-power plasma (parameters listed in Table 2) and a feedstock consisting of YSZ suspended in a mixture of water, ethanol, and ethylene glycol (10). A very high torch pass speed of 16 m/s was used to minimize the heat impulse to the substrate and prevent the formation of segmentation cracks in the electrolyte (11).…”

Section: Fabrication Of Metal-supported Fuel Cellsmentioning

confidence: 99%

Atmospheric Plasma-Sprayed Metal-Supported Solid Oxide Fuel Cells with Varying Cathode Microstructures

2015

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Metal-supported solid oxide fuel cells were manufactured by plasma spraying the cell layers on porous ferritic stainless steel supports. Cathodes with four different microstructures were produced by varying the plasma spray parameters and mixing carbon or starch-based pore forming agents with the ceramic feedstock powders. At 750°C, the best-performing button cell contained cathodes made with a carbon pore forming agent. This cell had an open circuit potential of 1.057 V and peak power density of 562 mW/cm². The lowest cell polarization resistance was 0.29 Ωcm² at 750°C, measured at an operating point of 0.7 V.

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Electrochemical performance of solid oxide fuel cells having electrolytes made by suspension and solution precursor plasma spraying

Cited by 33 publications

References 24 publications

Electrochemical Performance of Plasma Sprayed Metal Supported Planar Solid Oxide Fuel Cells

Electrochemical Performance of Plasma Sprayed Metal Supported Planar Solid Oxide Fuel Cells

What Do We Know, What are the Current Limitations of Suspension Plasma Spraying?

Atmospheric Plasma-Sprayed Metal-Supported Solid Oxide Fuel Cells with Varying Cathode Microstructures

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