Structural, morphological and electrical studies of BaCe0.8Y0.2O3-δ synthesized by solution combustion method

Jadhav, S. T.; Dubal, S.U.; Jamale, Atul P.; Patil, Shivajirao R.; Bhosale, C.H.; Puri, Vijaya; Jadhav, L.D.

doi:10.1007/s11581-014-1304-z

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…Measurements were taken in synthetic air in the temperature range 250-700°C. At these conditions ionic-hole transport occurs in Y-doped BaCeO 3 with the activation energy E a of this total conductivity about 0.7-0.8 eV [32,33]. Thus, the conductivity results for single-phase BaCe 0.9 Y 0.1 O 3-d stay in general agreement with the literature data and the total conductivity observed is the result of oxide ion conductivity via oxygen vacancies and hole conductivity.…”

Section: Chemical Stabilitysupporting

confidence: 86%

Structure, chemical stability and electrical properties of BaCe0.9Y0.1O3−δ modified with V2O5

Łącz

2019

J Therm Anal Calorim

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Wet vacuum impregnation method was applied in order to evaluate the possibility of the formation of the material in BaCe 0.9 Y 0.1 O 3-d -V 2 O 5 system. Single-phase BaCe 0.9 Y 0.1 O 3-d samples, synthesised by solid-state reaction method, were impregnated with the solution of vanadium(V) oxide precursor. Multi-step, multi-cycle impregnation procedure was applied to enhance the impregnation efficiency. Partial decomposition of Y-doped BaCeO 3 in contact with the solution of the precursor, resulting in the formation of vanadium containing phases (CeVO 4 and BaV 2 O 6 ) on the materials surface, was observed. However, the presence of vanadium was also confirmed for the inner parts of the materials. The synthesised materials were submitted for exposition test to evaluate their chemical stability towards CO 2 /H 2 O. All BaCe 0.9 Y 0.1 O 3based materials modified by impregnation revealed higher chemical stability in comparison with single-phase un-modified BaCe 0.9 Y 0.1 O 3-d , since the amount of barium carbonate formed during the exposition was significantly lower. The total electrical conductivity of the received multi-phase materials was generally slightly lower than for the reference BaCe 0.9 Y 0.1 O 3-d sample, since the presence of the additional phases had a blocking effect on materials conductivity. The values of BaCeO 3 lattice parameters and the Seebeck coefficient did not show the modification of the defects structure of Y-doped BaCeO 3 during applied synthesis procedure.

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Section: Chemical Stabilitysupporting

confidence: 86%

Structure, chemical stability and electrical properties of BaCe0.9Y0.1O3−δ modified with V2O5

Łącz

2019

J Therm Anal Calorim

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“…We have compared the conductivity of the BCY + 2NiO electrolyte with that of the BCY electrolytes reported by other groups, which is shown in the Supplementary Table S2. It should be noted that the conductivity of the BCY + 2NiO electrolyte in our case can be comparable to that of these BCY electrolytes [21,[32][33][34]. It should be noted that the conductivity of BCY + 2NiO sintered at 1400 • C is higher than that of the BCY electrolytes sintering at higher temperatures, indicating that adding NiO can enhance the conductivity and reduce the sintering temperature of the BCY electrolytes.…”

Section: Sem Microstructure Analysis and Conductivity Tests On Bcy-ni...supporting

confidence: 59%

Performance of BaCe0.8Y0.2O3-δ Proton Electrolyte Materials for Solid Oxide Fuel Cells by Compositing the Transition Metal Oxide NiO

Huang

Tian

et al. 2022

Coatings

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Since the conduction activation energy of a proton is low, proton-conducting solid oxide fuel cells (H-SOFCs) can work at low temperatures (around 600 °C), which is conductive to maintaining the long-term stability of SOFCs. Proton conductor BaCe1-xYxO3-δ is the most commonly used electrolyte material for H-SOFCs, which directly affects the performance of SOFCs. For the purpose of realizing the high-performance BaCe0.8Y0.2O3-δ (BCY) proton electrolyte materials for SOFC, the effect of different contents of the transition metal oxide NiO on the performance of proton electrolyte BCY was studied. Specifically, BCY-x mol% NiO (named BCY, BCY + 0.5NiO, BCY + 1NiO, BCY + 2NiO, and BCY + 3NiO, when x = 0, 0.5, 1, 2, and 3, respectively) composite electrolyte materials were prepared, and their crystal structures, morphologies, and electrochemical properties were explored. The results showed that NiO could effectively improve the density of BCY prepared at 1400 °C and enhance the proton conductivity of BCY and the performance of BCY-based SOFCs. Among them, the BCY + 2NiO electrolyte had good density and the highest proton conductivity, and the SOFC based on the BCY + 2NiO electrolyte had the best electrochemical performance, indicating that the optimal content of the NiO additive was 2 mol% in this case. The results reported in this work are conductive to the realization of high-performance proton electrolyte materials for the SOFC.

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“…The introduction of Y into cerium position in BaCeO 3 leads to the creation of the oxygen ion vacancies which result in oxygen ion conductivity in inert and dry atmospheres. However, in higher temperatures, hole conductivity may also be observed [23]. In water or hydrogen-containing atmospheres, the proton conductivity appears.…”

Section: Electrical Propertiesmentioning

confidence: 97%

“…The calculated values stay in agreement with the literature data. The activation energy of proton conductivity is reported to be 0.5-0.6 eV [26,27], and for oxide ion conductivity, the activation energy is about 0.75-0.8 eV [23]. The effect of materials' microstructure is reflected in the values of E a .…”

Section: Electrical Propertiesmentioning

confidence: 98%

Effect of microstructure on chemical stability and electrical properties of BaCe0.9Y0.1O3 − δ

Łącz

2016

Ionics

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Y-doped barium cerate BaCe 0.9 Y 0.1 O 3 − δ was synthesised by a solid-state reaction method. Materials with different average grain sizes and grain boundary surface areas were obtained. The effect of microstructure on the chemical stability in the CO 2 and H 2 O-containing atmosphere and electrical properties was analysed and discussed. To evaluate the chemical stability of BaCe 0.9 Y 0.1 O 3 − δ , the exposure test was performed. Samples were exposed to the carbon dioxide and water vapour-rich atmosphere at 25°C for 700 h. Thermogravimetry supplied by mass spectrometry was applied to analyse the samples before and after this comprehensive test. The mass loss for samples before and after the test and the amount of BaCO 3 formed during the test were directly treated as the measure of chemical instability of BaCe 0.9 Y 0.1 O 3 − δ in the atmosphere rich in carbon dioxide and water vapour. As it was observed, the BaCe 0.9 Y 0.1 O 3 − δ chemical stability towards CO 2 and H 2 O is not affected by the materials' microstructure. Electrical properties of BaCe 0.9 Y 0.1 O 3 − δ which differs with microstructure were determined using electrochemical impedance spectroscopy (EIS). It was found that the grain interior resistivity and activation energy of grain interior conductivity is microstructure independent. However, the effect on microstructure was seen on the EIS spectra in the range of grain boundary contribution. Therefore, the lowest activation energy and the highest conductivity were observed for a material with the lowest grain boundary surface area.

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Structural, morphological and electrical studies of BaCe0.8Y0.2O3-δ synthesized by solution combustion method

Cited by 10 publications

References 22 publications

Structure, chemical stability and electrical properties of BaCe0.9Y0.1O3−δ modified with V2O5

Structure, chemical stability and electrical properties of BaCe0.9Y0.1O3−δ modified with V2O5

Performance of BaCe0.8Y0.2O3-δ Proton Electrolyte Materials for Solid Oxide Fuel Cells by Compositing the Transition Metal Oxide NiO

Effect of microstructure on chemical stability and electrical properties of BaCe0.9Y0.1O3 − δ

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