Synthesis and properties of high-density protonic solid electrolyte BaZr0.9Y0.1O3 − α

Горелов, В. П.; Balakireva, V. B.

doi:10.1134/s1023193509040193

Cited by 23 publications

(19 citation statements)

References 14 publications

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“…1,[15][16][17][18][19][20][21][22][23][24] Table 1 summarizes the lattice parameters of BZY10 prepared by different techniques. 1,[15][16][17][18][19][20][21][22][23][24] Table 1 summarizes the lattice parameters of BZY10 prepared by different techniques.…”

Section: Introductionmentioning

confidence: 99%

“…BaZr 0.9 Y 0.1 O 3Àd (BZY10) was shown to crystallize in the cubic structure at room temperature with the space group Pm3m. 1,[15][16][17][18][19][20][21][22][23][24] Table 1 summarizes the lattice parameters of BZY10 prepared by different techniques. Apparent from this table, the lattice parameter is strongly dependent on the fabrication technique.…”

Section: Introductionmentioning

confidence: 99%

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Chemical expansion in BaZr_0.9−xCe_xY_0.1O_3−δ(x= 0 and 0.2) upon hydration determined by high‐temperature X‐ray diffraction

et al. 2017

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Understanding the strain from chemical expansion of proton‐conducting ceramics is crucial to prevent their failure under operating conditions. BZY10 (BaZr0.9Y0.1O3−δ) and BZCY72 (BaZr0.7Ce0.2Y0.1O3−δ) were studied using high‐temperature X‐ray diffraction (HT‐XRD) in moist and dry reducing atmosphere in order to prevent the competition with the oxidation reaction. Both powder and dense specimens were investigated and similar lattice parameters were obtained, demonstrating that the data were recorded on samples that were in equilibrium with the surrounding environment. Two sets of experiments were performed. In the first one, the sample was hydrated in situ in the XRD chamber at high temperature and diffraction data were collected during cooling. For the second set, the samples were pre‐hydrated ex situ in an autoclave and the XRD patterns were recorded during heating under dry conditions. As expected, lattice parameters were larger for the hydrated samples, due to hydration chemical expansion. The chemical expansion was also found to be larger with the presence of Ce. Finally, larger concentrations of protonic defects were present in the lattice of the ex situ pre‐hydrated samples compared with the in situ hydrated samples.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemical expansion in BaZr_0.9−xCe_xY_0.1O_3−δ(x= 0 and 0.2) upon hydration determined by high‐temperature X‐ray diffraction

et al. 2017

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“…After conducting a partial substitution of the Zr 4+ with the larger Y 3+ cation, a linear increase of the lattice constant is expected. Although in some works a slight lattice distortion for BZY10 bulk materials has been observed [13,80], most studies deduce a cubic structure from the XRDs with a lattice constant ranging from 4.20 to 4.209 Å [15,81,82,83,84,85,86,87]. A good summary of the different published constants for BZY10 may be found in reference [88].…”

Section: Resultsmentioning

confidence: 99%

Inkjet Printed Y-Substituted Barium Zirconate Layers as Electrolyte Membrane for Thin Film Electrochemical Devices

Schneller

Griesche

2019

Membranes

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In this work, the inkjet printing of proton conducting Y-substituted barium zirconate (BZY) thin films was studied. Two different kinds of precursor inks, namely a rather molecular BZY precursor solution and a BZY nanoparticle dispersion, have been synthesized and initially investigated with regard to their decomposition and phase formation behavior by thermal analysis, X-ray diffraction, and scanning electron microscopy. Their wetting behavior and rheological properties have been determined in order to evaluate their fundamental suitability for the inkjet process. Crystalline films have been already obtained at 700 °C, which is significantly lower compared to conventional solid-state synthesis. Increasing the temperature up to 1000 °C results in higher crystal quality. Permittivity measurements gave values of around 36 that are in good agreement with the literature while also proving the integrity of the materials. A modification of the as-synthesized BZY stock solution and nanoparticle dispersion by dilution with propionic acid improved the jetability of both inks and yielded homogeneous BZY coatings from both inks. In order to study the electrochemical properties of BZY films derived from the two printed inks, BZY coatings on sapphire substrates were prepared and characterized by electrochemical impedance spectroscopy.

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“…Perovskite-type yttrium-doped barium zirconate BaZr 0.9 Y 0.1 O 3-δ (BZY10) is a well-known proton conducting material promising for intermediate-temperature electrochemical applications due to high proton conductivity and good chemical stability [1,2,3,4]. The defect chemistry of BZY10, which is of key importance for understanding its conductivity, was studied using a number of techniques such as thermogravimetry (TGA) in water vapour containing atmosphere [2,3,5,6], conductivity measurements under wide range of conditions [4,5,7], quasi-elastic neutron scattering (QENS) [8,9], nuclear magnetic resonance (NMR) [10], X-ray absorption spectroscopy (XAS) [11] and computer simulations [12,13,14,15]. As a result, the nature of proton defects in BZY10 is relatively well studied [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…However, this is definitely not the case concerning electronic defects. Indeed, it is well known that under certain conditions BZY10 exhibits significant hole-type electronic conductivity comparable to, or even exceeding, the ionic one [5,6,7]. This p-type conductivity arises due to the partial filling of oxygen vacancies, created through Y-doping, by oxygen under an oxidizing atmosphere [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Behavior of BaZr0.9Y0.1O3−d Proton Conducting Electrolyte

et al. 2019

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BaZr0.9Y0.1O3-δ (BZY10), a promising proton conducting material, exhibits p-type conduction under oxidative conditions. Holes in BZY10 are of the small polaron type. However, there is no clear understanding at which places in the lattice they are localized. The main objectives of this work were, therefore, to discuss the nature of electronic defects in BZY10 on the basis of the combined measurements of the thermo-EMF and conductivity. Total electrical conductivity and Seebeck coefficient of BZY10 were simultaneously studied depending on partial pressures of oxygen (pO2), water (pH2O) and temperature (T). The model equation for total conductivity and Seebeck coefficient derived on the basis of the proposed defect chemical approach was successfully fitted to the experimental data. Transference numbers of all the charge carriers in BZY10 were calculated. The heat of transport of oxide ions was found to be about one half the activation energy of their mobility, while that of protons was almost equal to the activation energy of their mobility. The results of the Seebeck coefficient modeling indicate that cation impurities, rather than oxygen sites, should be considered as a place of hole localization.

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Synthesis and properties of high-density protonic solid electrolyte BaZr0.9Y0.1O3 − α

Cited by 23 publications

References 14 publications

Chemical expansion in BaZr_0.9−xCe_xY_0.1O_3−δ(x= 0 and 0.2) upon hydration determined by high‐temperature X‐ray diffraction

Chemical expansion in BaZr_0.9−xCe_xY_0.1O_3−δ(x= 0 and 0.2) upon hydration determined by high‐temperature X‐ray diffraction

Inkjet Printed Y-Substituted Barium Zirconate Layers as Electrolyte Membrane for Thin Film Electrochemical Devices

Thermoelectric Behavior of BaZr0.9Y0.1O3−d Proton Conducting Electrolyte

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Synthesis and properties of high-density protonic solid electrolyte BaZr0.9Y0.1O3 − α

Cited by 23 publications

References 14 publications

Chemical expansion in BaZr0.9−xCexY0.1O3−δ(x= 0 and 0.2) upon hydration determined by high‐temperature X‐ray diffraction

Chemical expansion in BaZr0.9−xCexY0.1O3−δ(x= 0 and 0.2) upon hydration determined by high‐temperature X‐ray diffraction

Inkjet Printed Y-Substituted Barium Zirconate Layers as Electrolyte Membrane for Thin Film Electrochemical Devices

Thermoelectric Behavior of BaZr0.9Y0.1O3−d Proton Conducting Electrolyte

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Chemical expansion in BaZr_0.9−xCe_xY_0.1O_3−δ(x= 0 and 0.2) upon hydration determined by high‐temperature X‐ray diffraction

Chemical expansion in BaZr_0.9−xCe_xY_0.1O_3−δ(x= 0 and 0.2) upon hydration determined by high‐temperature X‐ray diffraction