Synthesis and Characterization of High Density and Low Temperature Sintered Proton Conductor BaCe&lt;sub&gt;0.5&lt;/sub&gt;Zr&lt;sub&gt;0.35&lt;/sub&gt;In&lt;sub&gt;0.1&lt;/sub&gt;Zn&lt;sub&gt;0.05&lt;/sub&gt;O&lt;sub&gt;3-δ&lt;/sub&gt;

Азад, Абул Калам; Setsoafia, D.D.Y.; Lim, Chee Ming; Petra, Iskandar

doi:10.4028/www.scientific.net/amr.1098.104

Cited by 10 publications

(2 citation statements)

References 19 publications

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“…Remarkably, the estimated TEC of BCCFZ is only 9.607 × 10 −6 K −1 which is very close to the TEC of BCZYYb7111 (10.5 × 10 −6 K −1 ) [ 42 ] and BaCe 0.5 Zr 0.3 5In 0.1 Zn 0.05 O 3− δ (9.49 × 10 −6 K −1 ). [ 44 ] The striking reduction in TEC of BCCFZ could be attributed to the Ce‐rich phase, which is dispersed in the form of clustered nanoparticles at the grain boundaries of the Co‐rich phase. The coactive interaction between the two inherent phases in BCCFZ resulted in a significant reduction in the TEC.…”

Section: Resultsmentioning

confidence: 99%

Electrokinetic Insights into the Triple Ionic and Electronic Conductivity of a Novel Nanocomposite Functional Material for Protonic Ceramic Fuel Cells

Bello

Song

et al. 2022

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Triple ionic and electronic conductivity (TIEC) in cathode materials for protonic ceramic fuel cells (PCFCs) is a desirable feature that enhances the spatial expansion of active reaction sites for electrochemical oxygen reduction reaction. The realization of optimal TIEC in single‐phase materials, however, is challenging. A facile route that facilitates the optimization of TIEC in PCFC cathodes is the strategic development of multiphase cathode materials. In this study, a cubic‐rhombohedral TIEC nanocomposite material with the composition Ba(CeCo)0.4(FeZr)0.1O3−δ (BCCFZ) is designed via self‐assembly engineering. The material consists of a mixed ionic and electronic conducting phase, BaCo1−(x+y+z)CexFeyZrzO3−δ (M‐BCCFZ), and a dominant proton‐conducting phase, BaCe1−(x+y+z)CoxZryFezO3−δ (H‐BCCZF). The dominant cerium‐rich H‐BCCFZ phase enhances the material's oxygen vacancy concentration and the proton defects formation and transport with a low enthalpy of protonation of −30 ± 9 kJ mol−1. The area‐specific resistance of the BCCFZ symmetrical cell is 0.089 Ω cm2 at 650 °C in 2.5% H2O‐air. The peak power density of the anode‐supported single cell based on BCCFZ cathode reaches 1054 mW cm−2 at 650 °C with good operation stability spanning over 500 h at 550 °C. These promote BCCFZ as a befitting cathode material geared toward PCFC commercialization.

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Section: Resultsmentioning

confidence: 99%

Electrokinetic Insights into the Triple Ionic and Electronic Conductivity of a Novel Nanocomposite Functional Material for Protonic Ceramic Fuel Cells

Bello

Song

et al. 2022

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“…As solid solutions are easily formed from BaCeO 3 and BaZrO 3 , we can displace a desired fraction of Ce in BaCeO 3 with Zr to form a solid solution. As a result, the new form of BaCeO 3 exhibits both adequate proton conductivity as well as sufficient thermal and chemical stability over a large range of circumstances relevant to fuel cell operation [9,[16][17][18]. Doped zirconates have higher chemical stability than doped cerates but poorer conductivity.…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization of Multi-doped Barium Cerate as Perovskite for Solid Oxide Fuel Cells

Hossain,

Islam,

Lopa

et al. 2023

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Perovskite type material BaCe 0.65 Zr 0.10 Y 0.05 Pr 0.20 O 3-δ was synthesized by the conventional solid-state reaction method with a sintering temperature of 1350°C for 8 hours in an air atmosphere. The structural, morphological, and thermal characterizations have been performed using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), and Differential Thermal Analysis (DTA). From Rietveld refinement, we confirmed that our prepared sample was an orthorhombic crystal structure in the Pbnm space group. From TG/DTA, we get a gradual weight gain from 150 o C to 780 o C and a sharp weight loss after the temperature of 780 o C. The SEM image of the pellet surface of the sample shows that the sample sintered at 1350 o C was dense and suitable to use as an electrolyte in solid oxide fuel cells (SOFCs).

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Robust doped BaCeO3-δ electrolyte for IT-SOFCs

Khan

Azad

Savaniu

et al. 2017

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Single phase polycrystalline BaZr0.3Ce0.5Y0.1Yb0.1O3-δ electrolyte material was prepared by solid state reaction route. Rietveld analysis of the XRD data confirms the tetragonal symmetry in the I4/mcm space group with unit cell parameters of a = b = 6.0567(3) Å and c = 8.5831(5) Å. The addition of ZnO as a sintering additive was found to reduce the sintering temperature and enhance both overall sinterability and grain growth. Sintering temperature was reduced by 200-300ºC and a very high relative density of about 98% was achieved at 1400 o C. Impedance spectroscopy in humidified 5% H2/Ar atmosphere shows that the protonic conductivity at 600 o C was 8.60 x 10-3 S cm-1. Thermal analysis performed in pure CO2 atmosphere shows very good chemical stability up to 1200 o C. Good biaxial flexure strength of 100-200 MPa was reported which makes this material a promising electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs).

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Synthesis and Characterization of High Density and Low Temperature Sintered Proton Conductor BaCe<sub>0.5</sub>Zr<sub>0.35</sub>In<sub>0.1</sub>Zn<sub>0.05</sub>O<sub>3-δ</sub>

Cited by 10 publications

References 19 publications

Electrokinetic Insights into the Triple Ionic and Electronic Conductivity of a Novel Nanocomposite Functional Material for Protonic Ceramic Fuel Cells

Electrokinetic Insights into the Triple Ionic and Electronic Conductivity of a Novel Nanocomposite Functional Material for Protonic Ceramic Fuel Cells

Structural Characterization of Multi-doped Barium Cerate as Perovskite for Solid Oxide Fuel Cells

Robust doped BaCeO3-δ electrolyte for IT-SOFCs

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