Synthesis, forming and characterization of ceramic materials for the planar solid oxide fuel cell (SOFC)

Kountouros, P.; Förthmann, R.; Naoumidis, A.; Stochniol, Guido; Syskakis, E.

doi:10.1007/bf02426007

Cited by 39 publications

(19 citation statements)

References 10 publications

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“…The perovskite powders were synthesized using the spray-drying technique starting from nitrate precursors [23,24] and they were calcined at 900°C in order to develop the perovskite phase [24]. The stoichiometry of the powders was controlled by optical emission spectroscopy (ICP-OES), while the phase composition was evaluated by X-ray diffraction [5,24].…”

Section: Methodsmentioning

confidence: 99%

Electrochemical characterization of perovskite-based SOFC cathodes

et al. 2006

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The electrochemical performance of La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3-d (L58SCF), La 0.78 Sr 0.2 Co 0.2 Fe 0.8 O 3-d (L78SCF) and composite La 0.65 Sr 0.3 MnO 3-d -8 mol% Y 2 O 3 stabilized ZrO 2 (LSM-YSZ, 50:50 wt%) cathode electrodes interfaced to a double-layer electrolyte made of Ce 0.8 Gd 0.2 O 2-d (CGO) and YSZ was studied in the temperature range 600-850°C using impedance spectroscopy and current-overpotential measurements. The experiments were carried out in a single chamber cell using a three electrode set-up with porous Pt films as auxiliary electrodes. The perovskite powders were synthesized using the spray-drying technique starting from nitrate precursors and were deposited on the solid electrolyte via screen-printing. Open circuit impedance measurements on as-prepared electrodes, i.e. before any polarization, and micropolarization measurements have shown that the L78SCF/CGO/YSZ electrode exhibits the lowest area specific polarization resistance R F (R F was approximately equal to 0.4 W cm 2 at 800°C and P O 2 = 21 kPa) or, equivalently, the highest electrocatalytic activity according to the order: LSM/LSM-YSZ/CGO/ YSZ

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Section: Methodsmentioning

confidence: 99%

Electrochemical characterization of perovskite-based SOFC cathodes

et al. 2006

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“…oxides with A = La, Pr: A" = St: B = Fe, Mn, B' = Co wele prepared via a spray-drying process using nitrate salts of the cations as described in [ 10].…”

Section: Sample Preparation Powders Of Perovskite-typementioning

confidence: 99%

Release and uptake of oxygen in mixed-conducting SOFC cathode materials measured by temperature-programmed methods

Mai

Tietz

Stöver

2003

Ionics

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Abstract. Oxygen uptake and release in Al_aA'aBl_bB'bO3~ perovskite-type oxides with A = La, Pr; A" = Sr; B = Fe, Mn, B" = Co was examined by means of temperature-programmed oxidation (TPO) and temperature-programmed reduction (TPR). The investigated powders were prepared by spray-drying and were annealed at 900 to 1300 ~ In the TPR profiles, two processes of oxygen release from these materials were observed. The first TPR peak was regarded as surface adsorption, while the second one was considered to result from oxygen bulk diffusion. The oxygen volumes involved and the activation energy for the oxygen diffusion were determined from the TPO and TPR profiles and varied between 0.53 and 2.2 eV for the ferrites and manganites, respectively.

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“…The geometric areas of the counter and reference electrodes were 1.5 and 0.5 cm 2 , respectively. The perovskite powder was synthesised using the spraydrying technique starting from nitrate precursors [18,19] and calcined at 900°C in order to develop the perovskite phase [2,18]. The stoichiometry of the powder was controlled by optical emission spectroscopy (ICP-OES), while the phase composition was evaluated by X-ray diffraction [2,18].…”

Section: Introductionmentioning

confidence: 99%

AC Impedance Characterisation of a La_0.8Sr_0.2Co_0.2Fe_0.8O_3–δ Electrode

2009

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The electrochemical characteristics of a La0.8Sr0.2Co0.2Fe0.8O3–δ electrode, synthesised using the spray‐drying technique and deposited via screen printing on a double layer Ce0.8Gd0.2O2–δ/ZrO2(8 mol% Y2O3) electrolyte, were studied using AC impedance spectroscopy. It was found that depending on temperature (600 to 850°C) and oxygen partial pressure P (0.7 to 100 kPa) the impedance characteristics of the electrode are determined by up to three different processes, which were identified as ionic conduction in the electrode bulk, interfacial charge transfer and gas phase diffusion, respectively, on the basis of the temperature and oxygen partial pressure dependence of the polarisation conductance associated with the individual processes and the related pseudocapacitance values.

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Synthesis, forming and characterization of ceramic materials for the planar solid oxide fuel cell (SOFC)

Cited by 39 publications

References 10 publications

Electrochemical characterization of perovskite-based SOFC cathodes

Electrochemical characterization of perovskite-based SOFC cathodes

Release and uptake of oxygen in mixed-conducting SOFC cathode materials measured by temperature-programmed methods

AC Impedance Characterisation of a La_0.8Sr_0.2Co_0.2Fe_0.8O_3–δ Electrode

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Synthesis, forming and characterization of ceramic materials for the planar solid oxide fuel cell (SOFC)

Cited by 39 publications

References 10 publications

Electrochemical characterization of perovskite-based SOFC cathodes

Electrochemical characterization of perovskite-based SOFC cathodes

Release and uptake of oxygen in mixed-conducting SOFC cathode materials measured by temperature-programmed methods

AC Impedance Characterisation of a La0.8Sr0.2Co0.2Fe0.8O3–δ Electrode

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AC Impedance Characterisation of a La_0.8Sr_0.2Co_0.2Fe_0.8O_3–δ Electrode