Synthesis of nano-crystalline (Ba0.5Sr0.5)Co0.8Fe0.2O3−δ cathode material by a novel sol–gel thermolysis process for IT-SOFCs

Angaiah, Subramania; Saradha, T.; Muzhumathi, S.

doi:10.1016/j.jpowsour.2006.12.067

Cited by 36 publications

(17 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…No further weight loss is observed after temperatures reaching around 450˚C in the TGA plots which indicates the completion of combustion and formation of expected perovskite phase of BSCF. These results are similar to the other authors reported elsewhere [30] for BSCF gels.…”

Section: Tga/dta Characterizationsupporting

confidence: 93%

“…It is noted from the figures that the particle size of the calcined powders at 850˚C are larger than the as prepared powders since growth kinetics are favored and the spherical particles became larger with porous structure which resembled the typical cathode structure for SOFC application. The SEM images of BSCF obtained here are similar to the other authors reported [30]. The residual C element from the citric acid probably that had not been combusted fully yet is shown in EDS in the as prepared BSCF powder.…”

Section: Sem/eds Characterizationsupporting

confidence: 87%

“…So the initial nano size of the powders is retained after the combustion reaction in sol-gel process. The average particle size of BSCF powder obtained here with c/n of 0.50 are much better than particle sizes obtained for BSCF using combination of PVA and urea as fuel [30].…”

Section: Sem/eds Characterizationcontrasting

confidence: 53%

See 2 more Smart Citations

Synthesis of Ba0.5Sr0.5Co0.2Fe0.8O3 (BSCF) Nanoceramic Cathode Powders by Sol-Gel Process for Solid Oxide Fuel Cell (SOFC) Application

Alyousef¹,

Ghouse²

2011

WJNSE

View full text Add to dashboard Cite

The nano ceramic Ba 0.5 Sr 0.5 Co 0.2 Fe 0.8 O 3 (BSCF) powders have been synthesized by Sol-Gel process using nitrate based chemicals for SOFC applications since these powders are considered to be more promising cathode materials for SOFC. Glycine was used as a chelant agent and ethylene glycol as a dispersant. The powders were calcined at 850˚C/3 hr in the air using Thermolyne 47,900 furnace. These powders were characterized by employing SEM/EDS, XRD and TGA/DTA techniques. The SEM images BSCF powder indicate the presence of highly porous spherical particles with nano sizes. The XRD results shows the formation of BSCF perovskite phase at the calcination temperature of 850˚C. From XRD line broadening technique, the average crystllite size of the BSCF powders were found to be around 9.15 -11.83 nm and 13.63 -17.47 nm for as prepared and after calcination at 850˚C respectively. The TGA plot shows that there is no weight loss after the temperature around 450˚C indicating completion of combustion.

show abstract

Section: Tga/dta Characterizationsupporting

confidence: 93%

Section: Sem/eds Characterizationsupporting

confidence: 87%

See 1 more Smart Citation

Synthesis of Ba0.5Sr0.5Co0.2Fe0.8O3 (BSCF) Nanoceramic Cathode Powders by Sol-Gel Process for Solid Oxide Fuel Cell (SOFC) Application

Alyousef¹,

Ghouse²

2011

WJNSE

View full text Add to dashboard Cite

show abstract

“…But this seems to come rather from different applied heating rates and from non-equilibrated samples. Additionally, the inflexion between 600 and 800°C is often misinterpreted as phase transition phenomena or related to the introduction of oxygen vacancies [31,49,51]. The grade of inflexion strongly depends on the material preparation and hence on the phase purity as well as on experimental parameters like heating and cooling rate.…”

Section: Sintering and Shrinkage -Influence Of Thermal Treatmentmentioning

confidence: 99%

Flame Spray Synthesis of Nanoscale La_0.6Sr_0.4Co_0.2Fe_0.8O_3–δ and Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3–δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

Heel

Holtappels

Hug³

et al. 2010

Fuel Cells

View full text Add to dashboard Cite

Electrochemical performance and degradation was analysed by conductivity measurements as well as thermogravimetric analysis (TGA) under different atmospheres. CO2 was identified as a critical parameter in terms of carbonate formation from Ba0.5Sr0.5Co0.8Fe0.2O3–δ and causes a strong increase in the material resistivity, whereas La0.6Sr0.4Co0.2Fe0.8O3–δ is unaffected. The oxygen exchange kinetic of both compositions is affected by CO2 containing atmospheres.

show abstract

“…9) In the case of solution methods, a single phase of cubic BSCF perovskite can be obtained at less than 700°C. 10) However, BSCF was sintered on the electrolyte layer at higher than 850°C 11)15) due to the formation of a cathode layer on the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Reactive-sintering of Ba0.5Sr0.5Co0.8Fe0.2O3−δ using alkaline earth peroxides for low-temperature synthesis

Yamaguchi

Sumi

Shimada

et al. 2017

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

In this study, we developed the low-temperature synthesis of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3¹¤ (BSCF) using barium peroxide (BaO 2 ) and strontium peroxide (SrO 2 ) as starting materials of A-site elements in perovskite. The sintered bodies were obtained at a low temperature of 700°C by two approaches. One was a two-step sintering process, which included the preparation of fine hexagonal-phase BSCF powders with mean crystallite sizes of 2030 nm by a novel low-temperature solid-state reaction before sintering. Another approach was a one-step sintering process using reactive sintering, which is the simultaneous reaction of BSCF synthesis and green body sintering from the starting material powders. For the sintered bodies obtained by the one-and two-step sintering processes, the relative density was ca. 50%. The reactive-sintered body of hexagonal-phase BSCF obtained by the onestep process showed higher electrical conductivity of 6.3 S cm ¹1 at 500°C than the BSCF sintered bodies obtained by the two-step process (4.1 S cm ¹1). Reactive sintering realizes good connectivity among BSCF particles, which enhances the electrical conductivity of porous BSCF bodies.

show abstract

Synthesis of nano-crystalline (Ba0.5Sr0.5)Co0.8Fe0.2O3−δ cathode material by a novel sol–gel thermolysis process for IT-SOFCs

Cited by 36 publications

References 18 publications

Synthesis of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3</sub> (BSCF) Nanoceramic Cathode Powders by Sol-Gel Process for Solid Oxide Fuel Cell (SOFC) Application

Synthesis of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3</sub> (BSCF) Nanoceramic Cathode Powders by Sol-Gel Process for Solid Oxide Fuel Cell (SOFC) Application

Flame Spray Synthesis of Nanoscale La_0.6Sr_0.4Co_0.2Fe_0.8O_3–δ and Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3–δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

Reactive-sintering of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3−δ</sub> using alkaline earth peroxides for low-temperature synthesis

Contact Info

Product

Resources

About

Synthesis of nano-crystalline (Ba0.5Sr0.5)Co0.8Fe0.2O3−δ cathode material by a novel sol–gel thermolysis process for IT-SOFCs

Cited by 36 publications

References 18 publications

Synthesis of Ba&lt;sub&gt;0.5&lt;/sub&gt;Sr&lt;sub&gt;0.5&lt;/sub&gt;Co&lt;sub&gt;0.2&lt;/sub&gt;Fe&lt;sub&gt;0.8&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; (BSCF) Nanoceramic Cathode Powders by Sol-Gel Process for Solid Oxide Fuel Cell (SOFC) Application

Synthesis of Ba&lt;sub&gt;0.5&lt;/sub&gt;Sr&lt;sub&gt;0.5&lt;/sub&gt;Co&lt;sub&gt;0.2&lt;/sub&gt;Fe&lt;sub&gt;0.8&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; (BSCF) Nanoceramic Cathode Powders by Sol-Gel Process for Solid Oxide Fuel Cell (SOFC) Application

Flame Spray Synthesis of Nanoscale La0.6Sr0.4Co0.2Fe0.8O3–δ and Ba0.5Sr0.5Co0.8Fe0.2O3–δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

Reactive-sintering of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3&minus;&delta;</sub> using alkaline earth peroxides for low-temperature synthesis

Contact Info

Product

Resources

About

Synthesis of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3</sub> (BSCF) Nanoceramic Cathode Powders by Sol-Gel Process for Solid Oxide Fuel Cell (SOFC) Application

Synthesis of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3</sub> (BSCF) Nanoceramic Cathode Powders by Sol-Gel Process for Solid Oxide Fuel Cell (SOFC) Application

Flame Spray Synthesis of Nanoscale La_0.6Sr_0.4Co_0.2Fe_0.8O_3–δ and Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3–δ as Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

Reactive-sintering of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3−δ</sub> using alkaline earth peroxides for low-temperature synthesis