Characterization of ZrO co-doped with ScO and CeO electrolyte for the application of intermediate temperature SOFCs

Lee, D.-S.; Kim, W.S.; Choi, Shi‐Hoon; Kim, J.; Lee, H.-W.; Lee, J.-H.

doi:10.1016/j.ssi.2004.07.013

Cited by 183 publications

(97 citation statements)

References 39 publications

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“…The conductivities of the 10SSZ and 10Sc1CeSZ were about 2-5 times higher than that of 10GCO and 8YSZ, respectively. Consistent to literature [20,21], a change in the slope of the conductivity was observed for 10Sc1CeSZ in the lower temperature region of 550°C, while 10SSZ still shows significant higher conductivities. In Table 4 total conductivity σ at the particular temperatures of 600°C and 800°C is compared to literature data.…”

Section: Resultssupporting

confidence: 89%

Flame spray synthesis and characterisation of stabilised ZrO2 and CeO2 electrolyte nanopowders for SOFC applications at intermediate temperatures

et al. 2007

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by a liquid-fed one-step flame spray synthesis from waterbased solutions, or cost-effective rare earth nitrates with a high water content. It was found that this one-step synthesis, based on an acetylene-supported flame is able to produce phase pure and highly crystalline, nanoscale electrolyte materials. The assynthesised powders show a cubic lattice structure independent of production rates. Specific surface areas of the powders were adjusted between 20 and 60 m 2 g −2, where the latter is an upper limit for the further processing of the powders in terms of screen printing. The influence of process parameters on morphology, particle size, composition, crystallinity, lattice parameter, shrinkage behaviour and coefficient of thermal expansion of the as-synthesised powders were systematically investigated by transmission electron microscopy (TEM), nitrogen adsorption (BET), X-ray diffraction (XRD) and dilatometry. Electrochemical impedance spectroscopy (EIS) was applied at temperatures between 300°C and 900°C and confirmed the high quality and the competitive electrochemical behaviour of the produced powders.

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Section: Resultssupporting

confidence: 89%

Flame spray synthesis and characterisation of stabilised ZrO2 and CeO2 electrolyte nanopowders for SOFC applications at intermediate temperatures

et al. 2007

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“…The first one is a comparatively old problem of high temperature structural instability of scandia stabilized zirconia (SSZ) that results from arising in it high resistance phases [26,27]. The problem is solving by additional doping of zirconia with ~1-mol.…”

Section: Scandia Stabilized Zirconia and Related Problemsmentioning

confidence: 99%

The Structural Optimization of Ceramic Fuel Cells

Vasylyev¹,

Brychevskyi²,

Brodnikovskyi³

2016

ujc

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The paper addresses questions concerning the structural optimization of ceramic fuel cells (CFC) aiming to increase the ionic conductivity realized at long term operation of zirconia electrolyte in the very structure of CFC applying scandia as the stabilizer of zirconia cubic phase and electron beam physical vapor deposition as the production method of the CFC's electrolyte film. Its chemical composition would be optimized in a course of a few iteration processes of a substance transfer from virgin powders into the electrolyte phase of CFC laminated composite, which is changed by diffusion processes between CFC electrolyte and its electrode layers during CFC production and long-term operation. The final, optimized, chemical composition and structure of entire CFC would be tuned by taking into account the structural altering occurring during both production and operation.

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“…In this context, continuing efforts have been made to find a suitable additive allowing for phase stabilization without excessive deterioration of the ionic conductivity. The additives investigated include those oxides with relatively high solubility such as rare earths [4][5][6][7][8] and other oxides [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of additives on phase stabilization of scandia-doped zirconia

Muccillo¹,

Grosso²,

Reis³

et al. 2017

Matéria (Rio J.)

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The effects of small additions of tin, zinc, calcium and boron oxides on phase composition and electrical conductivity of zirconia-10 mol% scandia were investigated. Compounds containing 1 mol% zinc, tin and calcium oxides and 1, 3 and 5 wt.% boron oxide were prepared by solid state reaction and characterized by X-ray diffraction, density measurements, scanning electron microscopy and impedance spectroscopy. Full stabilization of the cubic structure at room temperature was obtained with additions of 1 mol% calcium oxide and 2 wt.% boron oxide. Partially stabilized compounds exhibit herringbone structure, characteristic of the β-rhombohedric phase. Specimens with calcium as additive show total conductivity of 23.8 mS.cm -1 at 750ºC with activation energy of 1.13 eV. Liquid phase sintering by boron oxide addition is effective to enhance the densification of the solid electrolyte.

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Characterization of ZrO co-doped with ScO and CeO electrolyte for the application of intermediate temperature SOFCs

Cited by 183 publications

References 39 publications

Flame spray synthesis and characterisation of stabilised ZrO2 and CeO2 electrolyte nanopowders for SOFC applications at intermediate temperatures

Flame spray synthesis and characterisation of stabilised ZrO2 and CeO2 electrolyte nanopowders for SOFC applications at intermediate temperatures

The Structural Optimization of Ceramic Fuel Cells

Influence of additives on phase stabilization of scandia-doped zirconia

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