Ba0.5Sr0.5Co0.8Fe0.2O3–δ–La0.6Sr0.4Co0.8Fe0.2O3–δ Composite Cathode for Solid Oxide Fuel Cell

Mosiałek, Michał; Kędra, A.; Krzan, Marcel; Bielańska, Elżbieta; Tatko, Maciej

doi:10.1515/amm-2016-0243

Cited by 11 publications

(2 citation statements)

References 26 publications

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“…Although BSCF possesses high ionic conductivity, its electronic conductivity is relatively low with a value of around 40 S cm –1 at 500–800 °C, which is much smaller than that of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3‑δ (LSCF6428) and LSM. ,− By introduction of a second phase with high electronic conductivity into BSCF, a composite cathode with high electrical conductivity will be formed, and thus BSCF-based cathodes with improved activity can be expected. − For example, Zhou et al added LaCoO 3 with an extremely high electrical conductivity of ∼1000 S cm –1 into BSCF, and the obtained composite showed a much higher electrical conductivity of ∼300 S cm –1 compared to pure BSCF (∼40 S cm –1 ) . A promising electrochemical performance was also demonstrated with an ASR of 0.21 Ω cm 2 at 600 °C for the BSCF-based composite consisting of 30 vol % LaCoO 3 .…”

Section: Energy Storage and Conversion Applicationsmentioning

confidence: 99%

Fundamental Understanding and Application of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

Shao

2021

Energy Fuels

143

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In the societal pursuit of a carbon-neutral energy future, energy storage and conversion technologies can play a decisive role in better utilizing sustainable energy sources such as wind and solar, in which functional materials that can promote overall energy efficiency hold the key. Perovskite oxides have attracted considerable attention as cost-effective, nonprecious metal-based candidates for this purpose due to their flexible chemistries and tunable physicochemical properties. Of all the perovskite compositions, the barium strontium cobalt iron oxide with a specific chemical formula of Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) has received considerable and growing interest over the last two decades in a variety of energy applications. In this review, we provide a comprehensive overview of the achievements made on BSCF for various energy storage and conversion applications. Importantly, we offer a fundamental understanding of the roles of BSCF in these applications and of the optimization approaches available to obtain improved functionalities, which can have an enormous impact on the search and development of materials based on BSCF and new materials beyond.

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Section: Energy Storage and Conversion Applicationsmentioning

confidence: 99%

Fundamental Understanding and Application of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

Shao

2021

Energy Fuels

143

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“…ough most of the problems associated with performance and material issues have been resolved to a certain extent, commercial applications of SOFCs still suffer from high costs and high-temperature requirements [21]. Research studies regarding SOFCs are focused on the range 500-700°C; the slow cathode reaction in this range is the source of many energy losses [15].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Properties of Ce_0.5Sr_0.5 (Co_0.8Fe_0.2)_1−xZr_xO_3−δ Cathode Materials for Low Intermediate Temperature Solid Oxide Fuel Cells (LIT‐SOFCs) Synthesized by Sol‐Gel Method

Ayalew

Rao

2021

Advances in Materials Science and Engineering

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Ce0.5Sr0.5 (Co0.8Fe0.2)1−x ZrxO3−δ (CSCFZ) powders were synthesized by the sol-gel method and characterized to study structural and electrochemical properties. X-ray diffractometer (XRD) patterns of all samples give nanosized particles of a high-degree crystalline cathode having a cubic-type perovskite structure of space group Pm-3m with the existence of oxygen vacancies in the lattices. The results have the perovskite phase with average crystallite sizes of 26.57 nm, 18.14 nm, 18.13 nm, and 18.12 nm with porosities of 9.93%, 9.87%, 9.50%, and 9.08% for x = 0, 0.1, 0.15, and 0.2, respectively. Scanning electron microscope (SEM) micrographs showed the presence of pores on the microstructure. Average grain sizes of prepared samples found from SEM images were in the range of 105.30–183.02 nm. The partial substitution of zirconium at the B-site shows more stable materials than the host without decreasing the porosity that much. The results of electronic conductivity analyzed by the four-probe dc technique show that the conductivity of synthesized materials increases with the increment of both dopant concentration and temperature by the decrement of area specific resistances. The electrical conductivity of CSCFZ steadily increased with the increment of temperature which reached 42.76 Scm−1 at around 450°C.

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Utilisation of methylcellulose as a shaping agent in the fabrication of Ba0.95Ca0.05Ce0.9Y0.1O3 proton-conducting ceramic membranes via the gelcasting method

Dudek

Lis

Kocyło

et al. 2019

J Therm Anal Calorim

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The gelcasting method was used to form gastight Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 samples proposed for use as proton-conducting electrolytes in solid oxide fuel cells. Methylcellulose was used as an environmentally friendly shaping agent for Ba 0.95-Ca 0.05 Ce 0.9 Y 0.1 O 3 powder in an ethanol solution. Samples of Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 were also prepared from the same powder via traditional isostatic pressing, as a reference for cast samples, and sintered in the same conditions. Comparative studies of the physicochemical properties of Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 electrolytes, formed by means of these two methods and then sintered at 1550°C for 2.5 h, were presented and discussed. Using the X-ray diffraction method, only the pure orthorhombic phase of BaCe 0.9 Y 0.1 O 3 was detected in the Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 powder, as well as in the Ba 0.95-Ca 0.05 Ce 0.9 Y 0.1 O 3 sintered pellets formed via both gelcasting (A) and isostatic pressing (B). Thermal effects occurring during heating of methylcellulose, as well as ceramic Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 powder, dried cast samples obtained from the prepared slurry, and sintered Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 samples, were examined by differential scanning calorimetry, differential thermal analysis, thermogravimetric analysis, and evolved gas analysis of volatile products using a quadrupole mass spectrometer. The measurements were performed within the temperature range of 20-1200°C in air. Based on dilatometric tests, it was found that the Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 cast samples exhibited slightly higher degree of sinterability than the 5CBCY samples obtained by isostatic pressing. In comparison with pressed pellets, higher values of total electrical conductivity in air or in a gas mixture of 5% H 2 in Ar were also attained for Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 cast samples. The Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 samples were used to construct oxygen-hydrogen electrolytes for solid oxide fuel cells. The results of the electrochemical performance of solid oxide fuel cells with Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 electrolytes were comparable to the data in the literature on BaCe 0.9 Y 0.1 O 3 electrolytes. An electrochemical study of a Ba 0.5 Sr 0.5-Co 0.8 Fe 0.2 O 3-d |Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 interface was also performed. Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-d appears to be a suitable cathode material for a Ba 0.95 Ca 0.05 Ce 0.9 Y 0.1 O 3 electrolyte.

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Ba0.5Sr0.5Co0.8Fe0.2O3–δ–La0.6Sr0.4Co0.8Fe0.2O3–δ Composite Cathode for Solid Oxide Fuel Cell

Abstract: Keywords: barium strontium cobalt ferrite; lanthanum strontium cobalt ferrite, solid oxide fuel cell, oxygen reduction reaction, electrochemical impedance spectroscopy * J. haBer insTiTuTe of CaTalysis and surfaCe CheMisTry Pas,

Cited by 11 publications

References 26 publications

Fundamental Understanding and Application of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

Fundamental Understanding and Application of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

Electrochemical Properties of Ce_0.5Sr_0.5 (Co_0.8Fe_0.2)_1−xZr_xO_3−δ Cathode Materials for Low Intermediate Temperature Solid Oxide Fuel Cells (LIT‐SOFCs) Synthesized by Sol‐Gel Method

Utilisation of methylcellulose as a shaping agent in the fabrication of Ba0.95Ca0.05Ce0.9Y0.1O3 proton-conducting ceramic membranes via the gelcasting method

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Ba0.5Sr0.5Co0.8Fe0.2O3–δ–La0.6Sr0.4Co0.8Fe0.2O3–δ Composite Cathode for Solid Oxide Fuel Cell

Abstract: Keywords: barium strontium cobalt ferrite; lanthanum strontium cobalt ferrite, solid oxide fuel cell, oxygen reduction reaction, electrochemical impedance spectroscopy * J. haBer insTiTuTe of CaTalysis and surfaCe CheMisTry Pas,

Cited by 11 publications

References 26 publications

Fundamental Understanding and Application of Ba0.5Sr0.5Co0.8Fe0.2O3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

Fundamental Understanding and Application of Ba0.5Sr0.5Co0.8Fe0.2O3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

Electrochemical Properties of Ce0.5Sr0.5 (Co0.8Fe0.2)1−xZrxO3−δ Cathode Materials for Low Intermediate Temperature Solid Oxide Fuel Cells (LIT‐SOFCs) Synthesized by Sol‐Gel Method

Utilisation of methylcellulose as a shaping agent in the fabrication of Ba0.95Ca0.05Ce0.9Y0.1O3 proton-conducting ceramic membranes via the gelcasting method

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Product

Resources

About

Fundamental Understanding and Application of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

Fundamental Understanding and Application of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

Electrochemical Properties of Ce_0.5Sr_0.5 (Co_0.8Fe_0.2)_1−xZr_xO_3−δ Cathode Materials for Low Intermediate Temperature Solid Oxide Fuel Cells (LIT‐SOFCs) Synthesized by Sol‐Gel Method