Electrode reaction and microstructure of La0.6Sr0.4CoO3− thin films

Sase, Maya; Suzuki, Junji; Yashiro, Keiji; Otake, Takanori; Kaimai, Atsushi; Kawada, Tatsuya; Mizusaki, Junichiro; Yugami, Hiroo

doi:10.1016/j.ssi.2006.01.018

Cited by 51 publications

(47 citation statements)

References 8 publications

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“…When the electrode oxide is highly nonstoichiometric with large amount of defects on oxygen sublattice, the bulk diffusion through the electrode is the predominant reaction path. Typical examples are La 1¹x Sr x CoO 3¹D 38,40,50,64,68 in oxidizing atmospheres and doped CeO 2 55 in reduced atmospheres.…”

Section: Surface Reaction (Dissociative Adsorption)-electrode Bulkmentioning

confidence: 99%

Model for Solid Electrolyte Gas Electrode Reaction Kinetics; Key Concepts, Basic Model Construction, Extension of Models, New Experimental Techniques for Model Confirmation, and Future Prospects

Mizusaki

2014

Electrochemistry

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In order to survey history and state of art of theoretical and kinetic studies of gas electrode reaction on solid oxide electrolyte, overview was made on the research works reported by the author and his co-investigators. Through reviewing their works, frontier of research is clarified. It was shown that electrode reaction is controlled by nonfaradaic chemical reaction process, and the nature of the overpotential is the chemical potential deviation of the interface from equilibrium state. Mechanical stress at the electrode/solid electrolyte interface is considered varying with the overpotential. Importance is emphasized for mechano-electrochemistry, the field to study the relationship of electrochemistry and mechanical property of the electrochemical cells.

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Section: Surface Reaction (Dissociative Adsorption)-electrode Bulkmentioning

confidence: 99%

Model for Solid Electrolyte Gas Electrode Reaction Kinetics; Key Concepts, Basic Model Construction, Extension of Models, New Experimental Techniques for Model Confirmation, and Future Prospects

Mizusaki

2014

Electrochemistry

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“…However, exposure to a high temperature caused cracking of the fi lm. Sase et al [ 28 ] made fi lms of La 0.6 Sr 0.4 CoO 3− δ (LSC64) at a low oxygen pressure of 0.01 mbar, 600 ° C, and 200 mJ cm − 2 , obtaining dense and fl at fi lms for further electrochemical studies. Yang et al [ 29 ] deposited both La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCF6428) and La 0.5 Sr 0.5 CoO 3− δ (LSC55) fi lms at oxygen partial pressure of 0.26 mbar, a laser fl uence of 10 J cm − 2 and a substrate temperature range 100 to 500 ° C. The obtained fi lms consist of vertically aligned nano-pores.…”

Section: Introductionmentioning

confidence: 99%

Tailoring of La_xSr_1‐xCo_yFe_1‐yO_3‐δ Nanostructure by Pulsed Laser Deposition

Plonczak

Bieberle‐Hütter

Søgaard

et al. 2011

Adv Funct Materials

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Pulsed Laser Deposition (PLD) was used to prepare thin fi lms with the nominal composition La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCF). The thin fi lm microstructure was investigated as a function of PLD deposition parameters such as: substrate temperature, ambient gas pressure, target-to-substrate distance, laser fl uence and frequency. It was found that the ambient gas pressure and the substrate temperature are the key PLD process parameters determining the thin fi lm micro-and nanostructure. A map of the LSCF fi lm nanostructures is presented as a function of substrate temperature (25-700 ° C) and oxygen background pressure (0.013-0.4 mbar), with fi lm structures ranging from fully dense to highly porous. Fully crystalline, dense, and crack-free LSCF fi lms with a thickness of 300 nm were obtained at an oxygen pressure lower than 0.13 mbar at a temperature of 600 ° C. The obtained knowledge on the structure allows for tailoring of perovskite thin fi lm nanostructure, e.g., for solid oxide fuel cell cathodes. A simple geometrical model is proposed, allowing estimation of the catalytic active surface area of the prepared thin fi lms. It is shown that voids at columnar grain boundaries can result in an increase of the surface area by approximately 25 times, when compared to dense fl at fi lms.

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“…Compared with bulk SOFCs, thin film SOFCs (TFSOFCs) are more cost-effective, have wider range of fuel options and higher fuel efficiency, and are considered to be one of the possible energy harvesting alternatives [5,6]. Recent research efforts mainly focus on lowering the TFSOFCs operating temperature (500e700 C or lower) by exploring new materials and optimizing the component microstructures.…”

Section: Introductionmentioning

confidence: 99%

Effects of interlayer thickness on the electrochemical and mechanical properties of bi-layer cathodes for solid oxide fuel cells

Yoon

Kim

et al. 2012

Journal of Power Sources

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Electrode reaction and microstructure of La0.6Sr0.4CoO3− thin films

Cited by 51 publications

References 8 publications

Model for Solid Electrolyte Gas Electrode Reaction Kinetics; Key Concepts, Basic Model Construction, Extension of Models, New Experimental Techniques for Model Confirmation, and Future Prospects

Model for Solid Electrolyte Gas Electrode Reaction Kinetics; Key Concepts, Basic Model Construction, Extension of Models, New Experimental Techniques for Model Confirmation, and Future Prospects

Tailoring of La_xSr_1‐xCo_yFe_1‐yO_3‐δ Nanostructure by Pulsed Laser Deposition

Effects of interlayer thickness on the electrochemical and mechanical properties of bi-layer cathodes for solid oxide fuel cells

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Electrode reaction and microstructure of La0.6Sr0.4CoO3− thin films

Cited by 51 publications

References 8 publications

Model for Solid Electrolyte Gas Electrode Reaction Kinetics; Key Concepts, Basic Model Construction, Extension of Models, New Experimental Techniques for Model Confirmation, and Future Prospects

Model for Solid Electrolyte Gas Electrode Reaction Kinetics; Key Concepts, Basic Model Construction, Extension of Models, New Experimental Techniques for Model Confirmation, and Future Prospects

Tailoring of LaxSr1‐xCoyFe1‐yO3‐δ Nanostructure by Pulsed Laser Deposition

Effects of interlayer thickness on the electrochemical and mechanical properties of bi-layer cathodes for solid oxide fuel cells

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Tailoring of La_xSr_1‐xCo_yFe_1‐yO_3‐δ Nanostructure by Pulsed Laser Deposition