New synthesis of nanopowders of proton conducting materials. A route to densified proton ceramics

Khani, Zohreh; Taillades-Jacquin, Mélanie; Taillades, Gilles; Marrony, Mathieu; Jones, Deborah J.; Rozière, Jacqués

doi:10.1016/j.jssc.2008.12.020

Cited by 50 publications

(33 citation statements)

References 52 publications

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“…From both TGA and XRD results, it is evident that removing/decomposing BaCO 3 secondary phase from the sample synthesized in air is difficult even after heating to 1200°C/24 h, which is not the case in samples synthesized under controlled atmosphere. The calculated lattice parameters for both air and N 2 prepared samples are 4.193 70.001 Å, which is very close to the reported values [41,42]. Fig.…”

Section: Resultssupporting

confidence: 87%

Effect of synthesis atmosphere on the proton conductivity of Y-doped barium zirconate solid electrolytes

Gonçalves

Maram

Navrotsky

et al. 2016

Ceramics International

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a b s t r a c tYttrium-doped barium zirconate ceramic powders were synthesized by the oxidant peroxide method in air and under controlled atmosphere of nitrogen inside a glove box. The powders were characterized by thermogravimetry, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. After uniaxial cold isostatic pressing, green pellets were sintered at 1600°C for 4 h. The electrical conductivity behavior was accessed by electrochemical impedance spectroscopy. The results show that specimens synthesized under controlled atmosphere achieved higher electrical conductivity, two orders of magnitude higher than specimens prepared in laboratory air. The enhancement in electrochemical properties and increase in sintering ability is attributed to the less carbonate contamination as a result lower grain boundary density in the samples prepared under controlled atmosphere.

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Section: Resultssupporting

confidence: 87%

Effect of synthesis atmosphere on the proton conductivity of Y-doped barium zirconate solid electrolytes

Gonçalves

Maram

Navrotsky

et al. 2016

Ceramics International

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“…Nevertheless, the cathode ASRs are in the same range as those reported for other PCFC cathodes such as BSCF (1-2 X cm 2 at 600°C) [11], and the electrochemical activity of this cathode material can be considered as promising. The conductivity of the electrolyte contribution, 8 × 10 -3 S cm -1 at 600°C, and the activation energy between 300 and 600°C (0.47 eV) are very close to those obtained for the bulk material [6] and are in full agreement with those reported in the literature [7,29].…”

Section: Symmetrical Assembliessupporting

confidence: 88%

“…Among potential electrolyte materials in this temperature range, rare earth doped oxides with a perovskite related structure show highest proton conductivity [5] in the range of 2.10 -3 -2.10 -2 S cm -1 at 600°C for yttrium-doped barium zirconate and cerate (BCZ, BCY) [6][7][8]. Several recent reports describe the fabrication of complete anode-electrode-cathode proton ceramic fuel cell (PCFC) assemblies.…”

Section: Introductionmentioning

confidence: 99%

Intermediate Temperature Anode‐Supported Fuel Cell Based on BaCe_0.9Y_0.1O₃ Electrolyte with Novel Pr₂NiO₄ Cathode

et al. 2010

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A proton conducting ceramic fuel cell (PCFC) operating at intermediate temperature has been developed that incorporates electrolyte and electrode materials prepared by flash combustion (yttrium‐doped barium cerate) and auto‐ignition (praseodymium nickelate) methods. The fuel cell components were assembled using an anode‐support approach, with the anode and proton ceramic layers prepared by co‐pressing and co‐firing, and subsequent deposition of the cathode by screen‐printing onto the proton ceramic surface. When the fuel cell was fed with moist hydrogen and air, a high Open Circuit Voltage (OCV > 1.1 V) was observed at T > 550 °C, which was stable for 300 h (end of test), indicating excellent gas‐tightness of the proton ceramic layer. The power density of the fuel cell increased with temperature of operation, providing more than 130 mW cm–2 at 650 °C. Symmetric cells incorporating Ni‐BCY10 cermet and BCY10 electrolyte on the one hand, and Pr2NiO4 + δ and BCY10 electrolyte on the other hand, were also characterised and area specific resistances of 0.06 Ω cm2 for the anode material and 1–2 Ω cm2 for the cathode material were obtained at 600 °C.

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“…Hence, studies showing new directions towards the development of chemical synthesis methods and for powder processing techniques have been presented, aiming to decrease the sintering temperature of that material [44][45][46][47] . The densification is important to guarantee just the proton and not molecular transport in those compounds.…”

Section: Defect Chemistrymentioning

confidence: 99%

Properties and applications of perovskite proton conductors

2010

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A brief overview is given of the main types and principles of solid-state proton conductors with perovskite structure. Their properties are summarized in terms of the defect chemistry, proton transport and chemical stability. A good understanding of these subjects allows the manufacturing of compounds with the desired electrical properties, for application in renewable and sustainable energy devices. A few trends and highlights of the scientific advances are given for some classes of protonic conductors. Recent results and future prospect about these compounds are also evaluated. The high proton conductivity of barium cerate and zirconate based electrolytes lately reported in the literature has taken these compounds to a highlight position among the most studied conductor ceramic materials.

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New synthesis of nanopowders of proton conducting materials. A route to densified proton ceramics

Cited by 50 publications

References 52 publications

Effect of synthesis atmosphere on the proton conductivity of Y-doped barium zirconate solid electrolytes

Effect of synthesis atmosphere on the proton conductivity of Y-doped barium zirconate solid electrolytes

Intermediate Temperature Anode‐Supported Fuel Cell Based on BaCe_0.9Y_0.1O₃ Electrolyte with Novel Pr₂NiO₄ Cathode

Properties and applications of perovskite proton conductors

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New synthesis of nanopowders of proton conducting materials. A route to densified proton ceramics

Cited by 50 publications

References 52 publications

Effect of synthesis atmosphere on the proton conductivity of Y-doped barium zirconate solid electrolytes

Effect of synthesis atmosphere on the proton conductivity of Y-doped barium zirconate solid electrolytes

Intermediate Temperature Anode‐Supported Fuel Cell Based on BaCe0.9Y0.1O3 Electrolyte with Novel Pr2NiO4 Cathode

Properties and applications of perovskite proton conductors

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Intermediate Temperature Anode‐Supported Fuel Cell Based on BaCe_0.9Y_0.1O₃ Electrolyte with Novel Pr₂NiO₄ Cathode