Structure and properties of perovskites for SOFC cathodes as a function of the A-site cation size disorder

Ecija, A.; Vidal, Karmele; Larrañaga, Aitor; Martínez-Amesti, Ana; Ortega-San-Martín, Luis; Arriortua, Marı́a I.

doi:10.1016/j.ssi.2013.01.010

Cited by 18 publications

(11 citation statements)

References 44 publications

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“…(Table 4) The electrical conductivities obtained are comparable with those previously reported for this type of perovskite material with high σ 2 (r A ) values [7,11]. However, in this study, a slight decrease in electrical conductivity was observed for the sample with G/N = 2 when a current of 100 mA was applied.…”

Section: Electrical Conductivity Studysupporting

confidence: 88%

“…As have been studied for similar compositions with high values of σ 2 (r A ) [11,12], the Rp values are very sensitive to changes in applied currents. Figure 13 shows the typical Nyquist diagram of the impedance spectroscopy for Samples with G/N = 1 and 2 at 800°C at OCP and under a current of 50 and 100 mA.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…This has traditionally been parameterised through the average A cation radius <r A >, often expressed as the Goldschmidt tolerance factor t= (<r A >+r O ) /√2(r B +r O ) [6], where r B and r O are the B-site cation and oxide ion radii, respectively. A strong <r A > dependence of the electrochemical properties has been reported [7][8][9]. However, it was subsequently shown that a general description requires the use of an additional parameter, the A cation size disorder, which takes into account the inherent disorder due to the size mismatch between different cations occupying the A-site.…”

Section: Introductionmentioning

confidence: 99%

“…Our group has studied the effect of this last parameter by impedance spectroscopy and a significant decrease in polarization resistance (Rp) with the application of the current was observed for a perovskite compound with a high value of σ 2 (r A ) [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Effect of the synthesis conditions on the properties of La0.15Sm0.35Sr0.08Ba0.42FeO3−δ cathode material for SOFCs

et al. 2017

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Abstract:The perovskite La 0.15 Sm 0.35 Sr 0.08 Ba 0.42 FeO 3-δ has been prepared by the glycine nitrate (GNC) route, varying the fuel/oxidizer ratio (glycine/nitrate, G/N= 1 and 2) and cooling rate (slow cooling and air-quenched), in order to study the influence of sample preparation on the materials' properties, in the context of their application as a cathode material for SOFCs. For this, the performance of the prepared mixed ion and electron conducting perovskite oxides is dictated by their structure, oxygen stoichiometry (3-δ), chemical composition and thermal expansion properties. High-resolution Synchrotron X-ray powder diffraction patterns were collected at room temperature and at 700 and 800ºC. It was found that the materials had a cubic crystal structure at these temperatures. As expected, 3-δ decreased as temperature increased, and was slightly smaller for the quenched sample. Higher electrical conductivity values were obtained for the sample with G/N = 1 (air-quenched) in the cooling rate. At 700 and 800°C the cathode synthesized with G/N = 1 and air-quenched showed the smallest polarization resistance values in impedance spectroscopy studies. Therefore, the physicochemical and electrochemical characterization clearly demonstrated the influence of the synthetic conditions on the cathode performance.

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Section: Electrical Conductivity Studysupporting

confidence: 88%

Section: Electrochemical Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of the synthesis conditions on the properties of La0.15Sm0.35Sr0.08Ba0.42FeO3−δ cathode material for SOFCs

et al. 2017

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“…8 shows the typical electrochemical impedance spectra measured at 700 and 800 C for the MCT3 and MCT10 samples. The high frequency intercept of the impedance arcs with the x axis corresponds to the ohmic resistance (R s ), which is generally attributed to the electrolyte and the contact resistance [52]. In the present case, R s were in different ranges due to the electrolyte thickness variability.…”

Section: Evaluation Of a Multilayered Symmetric Systemmentioning

confidence: 64%

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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Effect of Fe – substitution on phase transformation, optical, electrical and dielectrical properties of BaTiO3 nanoceramics synthesized by sol-gel auto combustion method

et al. 2016

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Structure and properties of perovskites for SOFC cathodes as a function of the A-site cation size disorder

Cited by 18 publications

References 44 publications

Effect of the synthesis conditions on the properties of La0.15Sm0.35Sr0.08Ba0.42FeO3−δ cathode material for SOFCs

Effect of the synthesis conditions on the properties of La0.15Sm0.35Sr0.08Ba0.42FeO3−δ cathode material for SOFCs

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

Effect of Fe – substitution on phase transformation, optical, electrical and dielectrical properties of BaTiO3 nanoceramics synthesized by sol-gel auto combustion method

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