Electrochemical properties of porous Sr0.86Ti0.65Fe0.35O3 oxygen electrodes in solid oxide cells: Impedance study of symmetrical electrodes

Mroziński, Aleksander; Molin, Sebastian; Karczewski, Jakub; Miruszewski, Tadeusz; Jasiński, Piotr

doi:10.1016/j.ijhydene.2018.11.203

Cited by 31 publications

(24 citation statements)

References 69 publications

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“…Most studies have focussed on the properties of thin and dense STFx films used as model electrodes [24,28], whereas the properties of porous electrodes have practically not been studied. Our previous work showed good performance of porous STF35 (SrTi 0.65 Fe 0.35 O 3 ) electrodes [40,41], which has also been confirmed by other authors [38]. The obtained polarisation resistance results were comparable with the well-known LSCF electrode materials.…”

Section: Introductionsupporting

confidence: 86%

“…x Fe x O 3-δ (x = 0.35, 0.5, 0.7) electrodes based on symmetrical cells. This work is a continuation of our previous initial study of an STF35 electrode [41].…”

Section: Introductionmentioning

confidence: 73%

“…SrTi 1-x Fe x O 3-δ (STFx) materials with different Fe substitution levels (x = 0.35, 0.5, 0.7) were synthesised from analytical grade (> 99% purity) reagents-strontium carbonate (EuroChem, PL), titanium dioxide (EuroChem, PL), and iron (III) oxide (Chempur, PL)-by the solid-state reaction method, as described in our earlier work [41]. Briefly, stoichiometric amounts of the reagents were re-ground in an agate mortar and were subsequently ball milled (Fritsch Pulverisette 7, ZrO 2 milling container) in absolute ethanol (99.9% purity) with a rotational speed of 600 rpm for 15 h using 5 mm YSZ balls.…”

Section: Materials and Samples Preparationmentioning

confidence: 99%

“…Gadolinium doped ceria (CGO) substrates, used for the preparation of the symmetrical cells, were made from a commercial powder (GDC-20 K, DKKK Japan), as presented in our previous work [41]. The surfaces of the sintered CGO substrates were ground and polished to obtain a smooth surface and remove any contaminants.…”

Section: Materials and Samples Preparationmentioning

confidence: 99%

“…For electrical contact, gold meshes were used for contacting the samples. The measurement parameters were used as described in our previous work [41].…”

Section: Microstructure and Performance Analysismentioning

confidence: 99%

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Effect of sintering temperature on electrochemical performance of porous SrTi1-xFexO3-δ (x = 0.35, 0.5, 0.7) oxygen electrodes for solid oxide cells

Mroziński

Molin

Jasiński

2020

J Solid State Electrochem

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This work evaluates the effects of the sintering temperature (800°C, 900°C, 1000°C) of SrTi 1-x Fe x O 3-δ (x = 0.35, 0.5, 0.7) porous electrodes on their electrochemical performance as potential oxygen electrode materials of solid oxide cells. The materials were prepared by a solid-state reaction method and revealed the expected cubic perovskite structure. After milling, the powders were characterised by a sub-micrometre particle size with high sinter-activity. It was shown that the lowest area specific resistance was achieved after sintering SrTi 0.65 Fe 0.35 O 3 electrodes at 1000°C, and SrTi 0.5 Fe 0.5 O 3 and SrTi 0.30 Fe 0.70 O 3 electrodes at 800°C, which can be considered to be a relatively low temperature. In general, EIS measurements showed that increasing the Fe content results in lowered electrode polarisation and a decrease of the series resistance. Even though the studied materials have much lower total conductivities than state-of-the-art electrode materials (e.g. (La,Sr)(Co,Fe)O 3 ), the polarisation resistances obtained in this work can be considered low.

show abstract

Section: Introductionsupporting

confidence: 86%

“…x Fe x O 3-δ (x = 0.35, 0.5, 0.7) electrodes based on symmetrical cells. This work is a continuation of our previous initial study of an STF35 electrode [41].…”

Section: Introductionmentioning

confidence: 73%

Section: Materials and Samples Preparationmentioning

confidence: 99%

Section: Materials and Samples Preparationmentioning

confidence: 99%

“…For electrical contact, gold meshes were used for contacting the samples. The measurement parameters were used as described in our previous work [41].…”

Section: Microstructure and Performance Analysismentioning

confidence: 99%

See 3 more Smart Citations

Effect of sintering temperature on electrochemical performance of porous SrTi1-xFexO3-δ (x = 0.35, 0.5, 0.7) oxygen electrodes for solid oxide cells

Mroziński

Molin

Jasiński

2020

J Solid State Electrochem

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A review on the preparation of anode materials and anode films for solid oxide fuel cell applications

Hadi

Somalu

Osman

et al. 2021

Intl J of Energy Research

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The primary components of SOFCs are the anode, cathode, and the electrolyte. Anode is critical in achieving the effective electrochemical oxidation of fuel; thus, its performance can be improved using homogenous powder synthesized through an appropriate method. Various synthesis methods, including solidstate reaction and wet chemical methods have been used to synthesize anode materials. However, each technique has several advantages and disadvantages.Given that anode is a porous electrode, few criteria, such as high conductivity, tolerance towards carbon deposition, chemical stability, and thermal stability, must be fulfilled. Researchers also modified the existing synthesis method to improve the performance of the anode. In addition, various anode fabrication techniques including physical and colloidal deposition techniques are briefly discussed to understand their effect on the performance of the deposited layers.The aim of this review is to discuss the various anode synthesis and deposition techniques and their influence on the properties and performance of SOFCs.

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Off-design operation of a proton conducting solid oxide fuel cell

Milewski

Szczęśniak

2022

Applied Thermal Engineering

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Electrochemical properties of porous Sr0.86Ti0.65Fe0.35O3 oxygen electrodes in solid oxide cells: Impedance study of symmetrical electrodes

Cited by 31 publications

References 69 publications

Effect of sintering temperature on electrochemical performance of porous SrTi1-xFexO3-δ (x = 0.35, 0.5, 0.7) oxygen electrodes for solid oxide cells

Effect of sintering temperature on electrochemical performance of porous SrTi1-xFexO3-δ (x = 0.35, 0.5, 0.7) oxygen electrodes for solid oxide cells

A review on the preparation of anode materials and anode films for solid oxide fuel cell applications

Off-design operation of a proton conducting solid oxide fuel cell

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