Citrate-nitrate Combustion Method Research Articles

Preparation, electrical properties, ab initio calculations and sodium motion in NaNi2As3O10 crystal structure

Benefiting from their structural diversity, high structural and thermal stability, and significant ionic conductivity, polyanionic framework materials are suitable for energy storage applications. This study details the synthesis and characterization of the arsenate compound NaNi2As3O10. The material was synthesized as polycrystalline powder by the citrate-nitrate combustion method and the crystal structure was determined using Rietveld analysis and confirmed by means of ab initio calculations. This phase crystallizes in the triclinic system with space group P1̅[a=6.69172 (5) Å; b=7.74930 (6) Å; c = 8.71357 (7) Å; α =108.6343 (6)°, β = 108.5190 (6)° and γ= 99.2169 (6)°]. Its crystal structure, which is isotypic to NaCo2As3O10, presents an open 3D framework that provides wide tunnels for Na+ hopping. Electrochemical Impedance Spectroscopy (EIS) and the bond valence site energy (BVSE) were used to investigate the electrical properties and the Na+ migration respectively. The overall conductivity of the sample reaches 4.58 ×10−5 S.cm−1 at 575 °C. The crystal structure enables 1D migration pathways of sodium ions within the NaNi2As3O10 network with a computed energy barrier of 1.11 eV. Compared to Na-ion conducting arsenates and other extensively studied polyanionic materials, NaNi2As3O10 presents an intermediate ionic conductivity.

Insights into the structural and optical properties of [formula omitted] substituted [formula omitted]

Y2−xTbxMo4O15(x=0,0.1,0.2,0.3,0.4,0.5,0.6,0.7) were successfully synthesized using citrate nitrate combustion method. The characterization techniques used in the present study involves X-ray Diffraction, Raman and FTIR spectroscopy, transmission electron microscopy, UV-Visible spectroscopy and photoluminescence spectroscopy. Structural analysis concludes that the compound crystallizes in monoclinic phase with space group P21/c as confirmed through Rietveld refinement. Diffuse reflectance spectra show a high absorption in the wavelength range 250 – 400 nm and the band gap energy values are evaluated. Photoluminescence spectra show an intense green emission at 545 nm and luminescence quenching of Y2−xTbxMo4O15 occurs beyond the concentration, x=0.4.The critical distance evaluated using Blasse’s expression is 9.24 Å and dipole-dipole interaction exists between the Tb3+ions which is confirmed through Dexter theory. The optimized nanophosphor has internal and external quantum yields equal to 11.01 % and 9.91 %, respectively, and has a decay time of 0.101 ms. These results strongly suggest that the prepared nanophosphor can be used as a green phosphor in pc-LEDs.

Effect of yttria substitution on structure, optical and mechanical properties of (Gd, Y)2O3–MgO nanocomposite ceramics

A citrate-nitrate combustion method was applied to synthesize fine composite Gd2-xYxO3-MgO (x = 0, 0.02, 0.2, 0.3, 0.4, 0.6) nanopowders. Y2O3 substitution inhibited Gd2O3 phase transition from cubic structure to monoclinic structure during sintering, thereby stabilizing its cubic structure to room temperature. This approach led to nanocomposite ceramics with a grain size of about 190 nm and increased the transmittance to 85% over the 3–5 μm wavelength range when x = 0.3. However, the addition of Y2O3 weakened the mechanic properties of the nanocomposite ceramics.

Preparation and characterization of Ta and monovalent alkali metals (Li, Na, K) co-doping on Sr11Mo4O23 electrolyte for solid oxide fuel cells

Double perovskite-type Sr11Mo4O23 material exhibits unusual structural flexibility and oxygen ion mobility. However, the transition of Sr11Mo4O23 cubic phase to SrMoO4 tetragonal phase around 400 ℃ makes the conductivity drop by 45.8 %. Hence, it is necessary to stabilize the phase structure and improve the electrochemical performance of Sr11Mo4O23 in order to be used for implementing into intermediate temperature solid oxide fuel cells (IT-SOFCs). In this work, a novel Sr10.8A0.2Mo3.5Ta0.5O23-δ (A =Li, Na, K) electrolyte powders are synthesized by a citrate-nitrate combustion method. X-ray diffraction, scanning electron microscopy and electrochemical impedance spectroscopy are used to investigate the effects of acceptor-type Ta and alkali metals co-doping on phase structural, microstructure and electrical properties of Sr11Mo4O23. All Sr10.8A0.2Mo3.5Ta0.5O23-δ samples show the same single phases as Sr11Mo4O23 (Fdm space group, JCPDS 27-1441). Doping Ta element at the B-site of Sr11Mo4O23 can inhibit the phase transition of Sr11Mo4O23 to SrMoO4 so as to improve the structure stability of Sr11Mo4O23. On this basis, doping alkali metal at the A-site further enhances the electrical conductivity of Sr11Mo3.5Ta0.5O23-δ(SMTO). Among them, Sr10.8K0.2Mo3.5Ta0.5O23-δ (SKMTO) sample has the conductivity of 2.02 × 10−2 S/cm in the air at 800 ℃, which is ∼ 233 % higher than that measured for Sr11Mo4O23. Moreover, the reliable chemistry stability of the SKMTO samples was demonstrated under wet reducing 5 % H2 or dry 3 % CO2 atmospheres, respectively. Finally, the single cells with SKMTO and SMTO electrolytes supported were successfully prepared by screen-printing method, respectively. The power density of SKMTO-cell is improved by at least 254 % compared to SMTO-cell. It can be deduced that co-doped Sr10.8K0.2Mo3.5Ta0.5O23-δ can be considered as potential electrolyte for IT-SOFCs.

Structural, morphological and magnetic properties of hexaferrite BaCo2Fe16O27 nanoparticles and their efficient lead removal from water

W-hexaferrite BaCo2Fe16O27 was prepared using the citrate nitrate combustion method. The sample was characterized using XRD, SEM, EDX and elemental mapping. XRD confirmed that the sample was synthesized in a single phase hexagonal structure with an average crystallite size 37.39 nm. SEM images of the sample show a spongy morphology with the agglomerated grain owing to dipole interaction between the crystallites. The magnetic properties of BaCo2Fe16O27 were studied using H-M hysteresis loop and the DC magnetic susceptibility. The sample has a ferrimagnetic behavior with saturation magnetization 64.133 emu/g. The magnetic properties of BaCo2Fe16O27 are originated from the Fe3+–O–Fe3+ superexchange. The synthesized sample is used as an adsorbent to remove the heavy metal Pb2+ from water. BaCo2Fe16O27 has Pb2+ removal efficiency 99% and 28% at pH 8 and 7 respectively. The Langmuir and Freundlich isotherms were used to analyze the experimental data. The Freundlich adsorption isotherm fitted the experimental data well.

Structure and electrical properties of BaCe1−xLaxO3−δ mixed conductors

In this study, BaCe1−xLaxO3−δ (x = 0.05, 0.10, 0.20, and 0.30) oxides synthesized using citrate–nitrate combustion method were calcined at 1100 °C for 5 h and subsequently sintered at 1550 °C for 5 h. Crystal structure, conductivity, and chemical properties were investigated via X-ray diffraction (XRD), alternating current (AC) impedance spectroscopy, and X-ray photoelectron spectroscopy (XPS). XRD analysis shows that all samples have orthorhombic perovskite-type structure, and lattice volume increases with increasing La content. XPS results show that Ba and La valence states are bivalent, and trivalent, respectively. Mixed Ce4+ and Ce3+ valence states can be identified in the samples. Furthermore, there are two types of O binding states in perovskite structure: (i) O–H groups/oxygen vacancies and (ii) lattice oxygen. AC impedance spectra reveal that all samples are proton–oxide ion–electron hole conductors at 400–800 °C in wet O2 atmosphere and proton–electron conductors at 400–800 °C in wet Ar atmosphere. Among these samples, BaCe0.90La0.10O3−δ and BaCe0.95La0.05O3−δ display the highest conductivities at temperatures below and above 500 °C, respectively. Furthermore, BaCe0.95La0.05O3−δ exhibits the highest total conductivity of 1.06 × 10−2 S cm−1 at 800 °C under PO2 ≈ 1 atm and PH2O = 0.006 atm.

Covalency and Racah parameters of Fe3+ in Mn–Zn–Cr nanoferrites

This study presents the covalency and Racah parameter (B) of Fe3+ in Mn–Zn–Cr nanoferrites, which prepared by citrate–nitrate combustion method. Racah parameter was determined from the spectral data. The bands in the range of interest in optical absorbance are wide and asymmetric; a deconvolution (deconvolution to their component bands) of the experimental spectra becomes compulsory. Further, these spectra were employed to obtain Racah parameter. Racah parameter was decreased, with further Fe addition, from 540 to 441 cm-1. Also, nephelauxetic ratio (β) was decreased from 0.532 to 0.435. This denotes that the bonds of Fe3+ and its surroundings become more covalent (the covalency is increased).

Copper ferrite nanoparticles as novel coating appropriated to solid-phase microextraction of phthalate esters from aqueous matrices

The prepared CuFe2O4 nanoparticles (NPs) resulting from a facile citrate–nitrate combustion method were adhesived on stainless steel wire with epoxy glue as a novel fiber coating. A direct immersion solid-phase microextraction (DI-SPME) method based on the prepared coating was established through sensitively detecting four phthalate esters (PAEs) from aqueous media with gas chromatography-flame ionization detection (GC-FID). The effects of various parameters on the efficiency of SPME process such as extraction time, extraction temperature, pH, ionic strength, desorption time, and desorption temperature were studied. Under optimized conditions, the limit of detections (LODs) and quantifications (LOQs) for the phthalate esters varied in the range of 0.12–0.40 μg·L−1 and 0.40–1.33 μg·L−1, respectively. The inter-day and intra-day relative standard deviations for these varied phthalate esters at 10 μg·L−1 concentration level (n = 6) using a single fiber were 3.9–12.4% and 6.6–15.1%, respectively. The fiber to fiber repeatabilities (n = 3), expressed as relative standard deviation (RSD%), were between 9.9% and 16.5% at 10 μg·L−1 concentration levell, and the the linear ranges varied between 1 and 500 μg·L−1. The prepared fiber can be repeatedly used to exceed 80 times, revealing a long lifetime and good stability. The method was successfully applied to analysis of the mineral water samples with recoveries from 81.1 to 103.7%. This work also provided an interesting insight for stable SPME fiber prepared by spinel materials for efficient extraction of PAEs.

Effect of Chromium on Electrochemical and Mechanical Properties of Beta-Al2O3 Solid Electrolyte Synthesized Via a Citrate-Nitrate Combustion Method

The beta-Al2O3 solid electrolyte doped with Chromium was synthesized via a citrate-nitrate combustion method, which started with NaNO3, LiNO3, Cr(NO3)3·9H2O, and Al(NO3)3·9H2O as the raw materials in this paper. The thermal behavior analysis, structure, and ionic conductivity of the beta-Al2O3 solid electrolyte were studied by the thermogravimetry/differential scanning calorimetry (TG/DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). Meanwhile, the relative density and bending strength of the samples were also measured. The results showed that with the appropriate Chromium doping, the calcining temperature of the precursor powders was only 1100 °C, the β″-Al2O3 phase content, bending strength, relative density, and ionic conductivity were all improved with a compact and uniform cross section micrograph. The optimized sample contained 94% of β″-Al2O3 phase and exhibited a relative density up to 98.13% of the theoretical density. In addition, it showed a good bending strength (215 MPa) and a satisficed ionic conductivity (0.110 S cm−1 at 350 °C).

Enhanced magnetic and dielectric properties of doped Co–Zn ferrite nanoparticles by virtue of Cr3+ role

Chromium substituted cobalt zinc (Co0.8 − xZn0.2CrxFe2O4; (0 ≤ x≤0.1; step 0.02), referred to Co-Zn-Cr) nanoferrite materials were synthesized by citrate nitrate combustion method. The effect of Cr3+dopant on the crystal structure, magnetic properties, dielectric properties, electrical transport and impedance analysis of Co–Zn nanoferrites was predestined. The cubic spinel phase formation without any impurity phase for Co–Cr–Zn nanoferrites was assured by XRD, FTIR and HRTEM analysis. Magnetic parameters displayed a peculiar demeanor as a function of Cr content, based on the crystallite size impact. Dielectric phenomena versus frequency and temperature were discussed relying on charge carriers (electrons and holes) hopping between diverse ions. Complex impedance analysis revealed the entity of electrical relaxations in the investigated samples besides the predominant of grain boundaries contributions to the conduction process. A distinctive attitude for dielectric parameters was obtained with Cr dopant, regarding the cation–anion and cation–cation bond length. The nanoferrite Co0.72Zn0.2Cr0.08Fe2O4 has the optimum magnetic and dielectric properties, which qualifies it for recording media and high frequency devices.

Effect of low-level Ca2+ substitution at perovskite B site on the properties of BaZr0.8Y0.2O3-δ

The substitution effect of 5 mol% calcium at perovskite B site was investigated systematically for yttrium doped barium zirconate, including phase structure, stability in different atmospheres, electrical conductivities and sinterability. In XRD patterns, BaZr0.8Y0.15Ca0.05O3-δ (BZYC5) powders synthesized by a citrate-nitrate combustion method show the cubic perovskite structure with a = 4.211 Å, and its characteristic diffraction peak shift toward the low-angle side compared to BaZr0.8Y0.2O3-δ (BZY) indicates that Ca2+ occupies the B site. The sintering shrinkage measurement and SEM images display a better sintering activity of BZYC5 than BZY. In both wet hydrogen and air environment, BZYC5 exhibits a higher total conductivity than BZY, which might be attributed to the enhancement of both proton formation/transportability and sintering activity. In addition, BZYC5 remains stable after CO2 and water vapor treatment, indicating a small amount of Ca2+ doping does not change the chemical stability of BZY. The anode-supported single cell with dense BZYC5 electrolyte was successfully assembled and its electrochemical properties were tested, giving a high peak power density of 218 mW cm−2 at 700 °C. These results suggest that BZYC5 is a promising electrolyte candidate for proton-conducting SOFCs.

Investigation in the variation of Gibbs energy of formation of RE6UO12 (RE = La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb, Lu) along the 4f series

The RE6UO12 (s) (RE = La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb, Lu) compounds were synthesized by citrate nitrate combustion method and characterized by X-Ray Diffraction (XRD) technique. Standard molar Gibbs energy of formation of RE6UO12(s) (RE = La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb, Lu) was determined from the equilibrium electromotive force (e.m.f) data obtained from solid-state Galvanic cell with oxide ion conducting yttria-stabilized-zirconia (YSZ) electrolyte. The cells were operated under high pure argon atmosphere. E.m.f. measurements were carried out in the temperature range of 850–1150 K. Phase transition in Sm6UO12(s) and Yb6UO12(s) were detected at 1125 K and 1065 K, respectively. The transition temperatures were confirmed from high temperature XRD technique. The standard enthalpy of formation and entropy at temperature of 298.15 K for RE6UO12 (s) was calculated from the Gibbs energy data using second and third law analysis and the data were compared with the corresponding data reported for RE2O3(s). Similar trend in enthalpy as well as entropy was observed for RE6UO12 (s) and RE2O3 (s) along the series of 4f elements.

Low temperature densification by lithium co-doping and its effect on ionic conductivity of samarium doped ceria electrolyte

Low temperature densification and improving the ionic conductivity of doped ceria electrolyte is important for the realization of efficient intermediate temperature solid oxide fuel cell system. Herein, we report the effect of lithium co-doping (1, 3, 5 and 7 mol%) in 20 mol% samarium doped ceria on the low temperature sinterability and conductivity. The synthesized nanoparticles by citrate-nitrate combustion method showed a decrease in lattice parameter and increase in oxygen vacancy with lithium content after calcination due to the substitution of Li+ into CeO2 lattice. Upon sintering at 900 °C, the density improved and reached a maximum value of 98.6% for 5% Li which exhibited a dense microstructure than at 7% Li. 5%Li co-doping exhibited the best conductivity of 3.65 × 10−04–1.81 × 10−3 S cm−1 in the operative temperature range of IT-SOFC (550–700 °C).Our results demonstrate the significance of lithium as co-dopant for efficient low temperature sintering as well as improving the electrolyte conductivity.

Synthesis and conductivity behaviour of Mo-doped La2Ce2O7 proton conductors

Mo-doped La2Ce2O7 with varied concentrations are prepared by the traditional citrate-nitrate combustion method. The effects of the phase structure of Mo-doped La2Ce2O7 are investigated by X-ray diffraction, scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and conductivity measurements. X-ray diffraction patterns reveal that all La2-xMoxCe2O7+δ samples have a cubic structure. Neverly, hole can be found on the surface of the samples from scanning electron microscopy. Raman spectra show that the different vibrating structures of pellets can be changed by introducing Mo into La2Ce2O7. Detailed X-ray photoelectron spectroscopy studies on the oxidation states of La2Ce2O7 and La1.85Mo0.15Ce2O7+δ indicate ratios of OC to OT (OT = OC + OL) are between 32.21% and 46.24%. The conduction behaviour of Mo doped La2Ce2O7 electrolyte is seriously researched under air and 5%H2-95%Ar conditions at 350–700 °C, and the highest conductivity of 7.36 × 10−3 and 1.65 × 10−2 Scm−1, respectively, are obtained with La1.85Mo0.15Ce2O7+δ pellets at 700 °C. The highest power density of single cells with the La1.85Mo0.15Ce2O7+δ electrolyte is approximately 0.643 Wcm−2 at 700 °C, suggesting that Mo-doped La2Ce2O7 can be used to substantially improve the electrochemical performance of low-temperature solid oxide fuel cells.

Effect of Cr dopant on the structural, magnetic and dielectric properties of Cu-Zn nanoferrites

Chromium substituted copper zinc ferrite of spinel crystal structure was synthesized in the form of nanoparticles using citrate nitrate combustion method. Phase composition, structure, magnetic and dielectric parameters were depicted by XRD, FTIR, HRTEM, VSM and dielectric measurements. Demeanor of magnetization has been elucidated on the basis of Neel's model of magnetic interactions and Yafet-Kittel angle existence. Dispersion of dielectric parameters proclaims the normal behavior of ferrites. Cole–Cole plot manifests the role of both grain boundary and bulk grain in conduction mechanism. The substitution of Cr3+ ions plays a decisive role in amending structural, magnetic and dielectric features of copper zinc nanoferrites. The optimum properties of the nanoferrite Cu0.8Zn0.2Cr0.02Fe1.98O4 make it primness for applications; especially data storage and magneto-electronic devices.

Co2CrO4 Nanopowders as an Anode Catalyst for Simultaneous Conversion of Ethane to Ethylene and Power in Proton-Conducting Fuel Cell Reactors

This study investigates the ethane conversion in solid oxide fuel cell (SOFC) reactors, comprising a nanosized Co–Cr2O3 nanocomposite anode catalyst, a proton-conducting BaCe0.8Y0.15Nd0.05O3−δ (BCYN) electrolyte, and a porous Pt cathode, for the purpose of cogenerating value-added ethylene with high selectivity and electrical power. The Co–Cr2O3 nanocomposite anode catalyst is achieved by reducing the Co2CrO4 precursor particles of about 5 nm, by a citrate–nitrate combustion method at an elevated temperature, whereas the BCYN dense membrane is obtained by sintering the BYCN precursor powders at 1400 °C for 10 h. The protonic SOFC reactor cogenerates a maximum power density of 173 mW·cm–2 and an ethylene yield of 32% at a selectivity of 91.6% at 700 °C. More importantly, no detectable acetylene and carbon dioxide (CO2) emission are formed, suggesting the superior electrocatalytic activity and dehydrogenation activity of the Co–Cr2O3 nanocomposite for the cogeneration of ethylene and electricity.

The role of Cr3+ ions substitution on structural, magnetic and dielectric modulus of manganese zinc nanoferrites

Polycrystalline manganese-zinc nanoferrites doped with Cr are produced by citrate–nitrate combustion method. Comprehensive analysis for the, Mn0.8Zn0.2CrxFe2−xO4; (0 ≤ x ≤ 0.1, step 0.02) nanoferrites was also performed using XRD, FTIR, HRTEM, magnetic and dielectric measurements. The structural, magnetic, and dielectric properties have been explained on the base of the entire cation distribution when Cr ions are added on the expense of Fe. VSM plots show narrow hysteresis loops, which infer that the investigated nanoferrites behave as super-paramagnetic materials. Cole-Cole plots proved that the conductivity is basically due to the grain boundary at low frequencies, and the bulk grains at high frequencies. The composition dependence of ε′, tanδ, and σac manifests that the nanoferrite with x=0.04 is the optimized content. Summarizing the results, soft nanoferrite Mn0.8Zn0.2Cr0.04Fe1.96O4 displayed distinctive features, which elect it for multilateral applications; especially for magnetic recording and computer memories.

Role of A Cation Vacancy in the Exchange-Biased LaFeO3 Multiferroic Nanocrystals

Multiferroic samples with the chemical formula La $_{1-x}\square _{x}$ FeO3 (0.0 ≤ x ≤ 0.03) were successfully prepared in nanoscale by citrate nitrate combustion method. XRD data reveals crystallized single-phase orthorhombic symmetry for the prepared nanopowder. All measured magnetic parameters point to the antiferromagnetic character with weak ferromagnetic moment. The value of the molar magnetic susceptibility (χ M ) for La $_{\mathrm {0.99}}\square _{\mathrm {0.01}}$ FeO3 reaches 3.5 times that of the undoped sample. The saturation magnetization of the samples La $_{\mathrm {0.99}}\square _{\mathrm {0.01}}$ FeO3 and La $_{\mathrm {0.97}}\square _{\mathrm {0.03}}$ FeO3 increased two times as compared with that of the parent one. The exchange bias (EB) effect was observed for 1st time at room temperature and originated from antiferromagnetic–ferromagnetic (AFM-FM) interface effect. Ferroelectric hysteresis loop was observed at room temperature for the samples which highlighted the presence of the ferroelectric ordering. A huge enhancement in the saturation (P s), the remnant polarization (P r), and the coercive electric field (E c) of the sample La $_{\mathrm {0.98}}\square _{\mathrm {0.02}}$ FeO3 by 7.5, 24, and 12 times, respectively, when compared with the parent sample LaFeO3. Based on the obtained results, the investigated samples are categorized in type I multiferroics.

Preparation and performance of Na-doped La2Ce2O7 electrolytes for protonic ceramic fuel cells

The protonic material La2Ce2O7 exhibits good tolerance to H2O and CO2 compared to BaCeO3-based materials and has become increasingly popular for operation at low-to-intermediate temperatures in protonic ceramic fuel cells. In this work, doping La2Ce2O7 with Na in a series with varying compositions is studied. All of the precursors are prepared by a common citrate-nitrate combustion method. X-ray diffraction images reveal that all of the La2-xNaxCe2O7-δ samples have a cubic structure. The La2-xNaxCe2O7-δ pellets are characterized by scanning electron microscopy and are observed to be dense without holes. The effects of Na-doping on the La2Ce2O7 electrical conductivity are carefully investigated in air at 350–800°C and 5%H2-95% Ar environments at 350–700°C. It is found that different levels of Na doping in La2Ce2O7 are conducive to improving the electrical conductivity and sinterability. Among the pellets, La1.85Na0.15Ce2O7-δ exhibited the highest electrical conductivity in air and 5% H2-95% Ar atmospheres. Anode-supported half cells with La1.85Na0.15Ce2O7-δ electrolyte are also fabricated via a dry-pressing process, and the corresponding single cell exhibited a desirable power performance of 501mWcm−2 at 700°C. The results demonstrate that La1.85Na0.15Ce2O7-δ is a promising proton electrolyte with high conductivity and sufficient sinterability for use in protonic ceramic fuel cells operating at reduced temperatures.

BaCe0.5Zr0.3Y0.2–xYbxO3–δ proton-conducting electrolytes for intermediate-temperature solid oxide fuel cells

This work describes new findings concerning the preparation of Y- and Yb- co-doped BaCeO3–BaZrO3 materials, their structural, microstructural, electrical characterization and application as electrolytes for solid oxide fuel cell. The BaCe0.5Zr0.3Y0.2–xYbxO3–δ (x=0–0.2, Δx=0.05) materials are successfully synthesized using a citrate-nitrate combustion method and then sintered at 1450°C to form single-phase and highly dense ceramic samples. The sample with the BaCe0.5Zr0.3Y0.1Yb0.1O3–δ (BCZYYb) composition is found to possess the largest grains coupled with the highest ionic conductivity. This ceramic material is used as an electrolyte for the fabrication an electrochemical cell designed as NiO–BCZYYb|BCZYYb (25 μm)|NBFC (where NBFC=Nd0.5Ba0.5Fe1.9Cu0.1O3–δ), which demonstrates as maximal power density as 140 and 290mWcm−2 at 600 and 700°C with open circuit voltages higher than 1.01–1.04V, respectively. The separation of the total resistance of the cell in its ohmic and polarization components allows the film electrolyte conductivity to be calculated, which attains quite high level (2.4 and 3.8mScm−1, respectively). This study shows that BaCe0.5Zr0.3Y0.1Yb0.1O3–δ can be used instead of electrolytes with a lower Zr-concentration (for example, BaCe0.7Zr0.1Y0.1Yb0.1O3–δ) with no significant deterioration of the transport properties.