Gd[sub 0.6]Sr[sub 0.4]Fe[sub 0.8]Co[sub 0.2]O[sub 3−δ]: A Novel Type of SOFC Cathode

Søgaard, Martin; Mogensen, Mogens Bjerg

doi:10.1149/1.2743140

Cited by 15 publications

(8 citation statements)

References 15 publications

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“…Gd‐containing Fe‐Co‐based perovskites have been studied previously, and they have remarkably high activities toward the reduction of oxygen in SOFCs . This has been suggested to be due to the creation of a two‐phase compound with a unique microstructure .…”

Section: Introductionsupporting

confidence: 77%

“…In this study, A‐site deficient Fe‐Co‐based perovskites with Gd and Sr as A‐site cations are synthesized and studied using cone‐shaped electrodes and electrochemical impedance spectroscopy (EIS). Gd‐containing Fe‐Co‐based perovskites have been studied previously, and they have remarkably high activities toward the reduction of oxygen in SOFCs . This has been suggested to be due to the creation of a two‐phase compound with a unique microstructure .…”

Section: Introductionmentioning

confidence: 62%

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Studies of A‐site Deficient (Gd_0.6Sr_0.4)_1–sFe_0.8Co_0.2O_3–_δ Cathodes in SOFCs

Hansen

2018

Fuel Cells

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A series of A-site deficient Gd-containing Fe-Co-based cathodes were synthesized using the glycine-nitrate process. All the compounds consisted of two phases, i.e., a cubic and orthorhombic phase, as determined by powder X-ray diffraction (XRD). The thermal expansion coefficient decreased with increasing A-site deficiency, which could be because cobalt was expelled from the main phases. Likewise, the electrochemical activities of the Gd-containing Fe-Co-based solid oxide fuel cell cathodes toward the reduction of oxygen ware improved by a factor of approximately 3 by making them A-site deficient. The composition (Gd 0.6 Sr 0.4 ) 0.85 Fe 0.8 Co 0.2 O 3-d showed the highest activity toward the reduction of oxygen among the five compounds. Electrochemical impedance spectroscopy estimated the area specific resistance as 5.77 Ω cm 2 at 600°C. The electrochemical impedance spectroscopy measurements revealed three arcs for most of the compounds at the three temperatures where the measurements were performed.

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Section: Introductionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 62%

Studies of A‐site Deficient (Gd_0.6Sr_0.4)_1–sFe_0.8Co_0.2O_3–_δ Cathodes in SOFCs

Hansen

2018

Fuel Cells

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“…r is the radius of the contact between the coneshaped electrode and the electrolyte, from which the contact area can be calculated. Some measurements on ceramic cone-shaped electrodes have already been undertaken (10)(11)(12)(13)(14). It seems like this technique is very useful when comparing different electrode materials.…”

Section: (1) Introductionmentioning

confidence: 99%

Evaluation of LSF based SOFC Cathodes using Cone-shaped Electrodes

Mogensen¹

2008

ECS Trans.

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Seven La1-xSrxFeO3-δ (x = 0, 0.05, 0.15, 0.25, 0.35, 0.50, 0.70) based perovskites were synthesized using the glycine-nitrate method. The La1-xSrxFeO3-δ compounds were characterized with powder X-ray diffraction and electrochemical impedance spectroscopy on cone-shaped electrodes using a Ce1.9Gd0.1O1.95 electrolyte. The activity of the La1-xSrxFeO3-δ based perovskites towards the electrochemical reduction of oxygen was strongly dependent of the strontium content, the activity being highest for the composition La0.85Sr0.15FeO3-δ. The results indicates that Fe(III) is the catalytic active specie towards the electrochemical reduction of oxygen in a solid oxide fuel cell on La1-xSrxFeO3-δ compounds. The results also show that oxide ion vacancies in the perovskite structure are important for the electrochemical reduction of oxygen. However, the effect of ordering of oxide ion vacancies for the strontium rich compounds can not be excluded.

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“…For example, our recent result showed that the sub 1 nm equivalent oxide thickness (EOT) high-k stack was achieved with a proper interface layer structure prepared under a tight annealing condition. 65) Since most a-Si:H TFT processes are done at low temperatures and under thermodynamically non-equilibrium conditions, the experience would be useful for the nano-size device fabrication on large-size wafers.…”

Section: High-k Gate Dielectricsmentioning

confidence: 99%

Thin-Film Transistor and Ultra-Large Scale Integrated Circuit: Competition or Collaboration

Kuo

2008

jjap

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Thin-film transistor (TFT) and ultra-large scale integrated circuit (ULSIC) have been compared and discussed with respect to the development history, technology trends, and applications. Detailed issues on materials, processes, and devices in the largearea TFT array fabrication and nano-size metal-oxide-semiconductor field effect transistors (MOSFETs) composed ULSIC on large wafers were also examined. The TFT fabrication processes were originally derived from ULSIC. However, there are many unique large-area processes and theories developed during the study of the TFT array fabrication, which can greatly benefit the future large wafer ULSIC production process. Although their future applications will be in different areas, there are opportunities that TFTs can be integrated into ULSIC products to enhance the functions and performance.

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Gd[sub 0.6]Sr[sub 0.4]Fe[sub 0.8]Co[sub 0.2]O[sub 3−δ]: A Novel Type of SOFC Cathode

Cited by 15 publications

References 15 publications

Studies of A‐site Deficient (Gd_0.6Sr_0.4)_1–sFe_0.8Co_0.2O_3–_δ Cathodes in SOFCs

Studies of A‐site Deficient (Gd_0.6Sr_0.4)_1–sFe_0.8Co_0.2O_3–_δ Cathodes in SOFCs

Evaluation of LSF based SOFC Cathodes using Cone-shaped Electrodes

Thin-Film Transistor and Ultra-Large Scale Integrated Circuit: Competition or Collaboration

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Gd[sub 0.6]Sr[sub 0.4]Fe[sub 0.8]Co[sub 0.2]O[sub 3−δ]: A Novel Type of SOFC Cathode

Cited by 15 publications

References 15 publications

Studies of A‐site Deficient (Gd0.6Sr0.4)1–sFe0.8Co0.2O3–δ Cathodes in SOFCs

Studies of A‐site Deficient (Gd0.6Sr0.4)1–sFe0.8Co0.2O3–δ Cathodes in SOFCs

Evaluation of LSF based SOFC Cathodes using Cone-shaped Electrodes

Thin-Film Transistor and Ultra-Large Scale Integrated Circuit: Competition or Collaboration

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Product

Resources

About

Studies of A‐site Deficient (Gd_0.6Sr_0.4)_1–sFe_0.8Co_0.2O_3–_δ Cathodes in SOFCs

Studies of A‐site Deficient (Gd_0.6Sr_0.4)_1–sFe_0.8Co_0.2O_3–_δ Cathodes in SOFCs