Technological challenges in the application of proton conducting ceramics

Iwahara, Hiroyasu

doi:10.1016/0167-2738(95)00051-7

Cited by 508 publications

(292 citation statements)

References 22 publications

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“…With the progress in the synthesis and characterization of the newly discovered materials, such as the BaCeO 3 and CaZrO 3 perovskites, an intense research has also been devoted to the comprehension of the defect chemistry of the same materials, in order to optimize their performance and build the basis for the development of other solid-state proton conductors [10][11][12][13][14][15] (1) with oxygen vacancies constituting the site for the incorporation of water in the form of hydroxyl groups through:…”

Section: Introductionmentioning

confidence: 99%

Correlation between Thermal Properties, Electrical Conductivity, and Crystal Structure in the BaCe_0.80Y_0.20O_2.9 Proton Conductor

2008

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In this paper we report an extensive neutron diffraction investigation at high temperature on the BaCe 0.80 Y 0.20 O 2.9 proton conducting material. Our results precisely define the structural evolution of the compound as a function of temperature which is from a monoclinic (room temperature) to a cubic (800°C) structure. Neutron data have been correlated to calorimetric measurements (TGA and DSC) and conductivity properties of the material.

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Section: Introductionmentioning

confidence: 99%

Correlation between Thermal Properties, Electrical Conductivity, and Crystal Structure in the BaCe_0.80Y_0.20O_2.9 Proton Conductor

2008

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“…3) Recently, in nuclear fusion technology, there is high interest in tritium pump using proton-conducting ceramics of SrCe 0:95 Yb 0:05 -O 3Àa 1) and CaZr 0:9 In 0:1 O 3Àa . 2) This is because such ceramics can effectively recover tritium molecules from low concentration tritium water vapor in blanket sweep gas or vacuum exhaust gas of a fusion reactor.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Analysis of Mass Transfer in SrCe0.95Yb0.05O3-a Fuel Cell using Complex Impedance Plot

Fukada

Onoda

Suemori

2005

J. Nucl. Sci. Technol.

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For the application of proton-conducting ceramics to tritium pumps in nuclear fusion technology, mass-transfer process in a SrCe 0:95 Yb 0:05 O 3Àa fuel cell was studied experimentally and analytically using complex impedance plot based on an alternate current method. Impedance plots on a complex plane of the SrCe 0:95 Yb 0:05 O 3Àa fuel cell with the supply of hydrogen and oxygen under a dry or moist condition revealed the presence of a composite imaginary impedance comprised of several mass-or charge-transfer processes as follows: hydrogen or oxygen dissociation on a porous Ni or NiO electrode, hydrogen or oxygen diffusion through the Ni or NiO electrode, reaction of hydrogen and oxygen, and proton diffusion through the ceramic electrolyte. The values of parameters appearing in the mathematical model of their respective mass-transfer and charge-transfer processes were determined independently under different conditions of the hydrogen and oxygen partial pressures, temperature and dry or moist atmosphere. The temperature dependence of the parameters was made clear experimentally, and their physical meaning was discussed. The resistance of the reaction between proton and oxygen ion on the cathode electrode was found to be a key factor.

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“…In a previous study (Yano et al, 2009;Masuda et al, 2014), the authors proposed a new anode incorporating a proton conductor material with a perovskite structure (Iwahara, 1995) to reduce the anode overpotential. In these studies, it was revealed that the anode overpotential was reduced by addition of BaCe 0.8 Y 0.2 O 3-δ (BCY) particles to the Ni/GDC cermet anode (Yano et al, 2009), and that the BCY particles could adsorb a significant amount of hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Power generation characteristics of a SOFC with a Ni/YSZ anode incorporating a SrZr0.95Y0.05O3-α proton conductor

Nagasawa

Hanamura

2015

JTST

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In order to improve the performance and stability of anodes for solid oxide fuel cells (SOFCs) under low hydrogen concentration conditions, SrZr 0.95 Y 0.05 O 3-α (SZY) proton conductor particles were incorporated into the conventional Ni/YSZ anode. Power generation experiments were conducted using the electrolyte-supported single cells with conventional Ni/YSZ and Ni/YSZ-5%SZY anodes. Enhanced output power density under low hydrogen partial pressure conditions was achieved with the modified anode. This enhancement is ascribed to a decline in the anode overpotential of the Ni/YSZ-5%SZY anode, estimated from impedance spectra, compared to that of the conventional Ni/YSZ anode. In addition, the amount of hydrogen adsorption on Ni, YSZ, and SZY was measured using thermal desorption spectroscopy (TDS). This revealed that the proton conductor SZY could adsorb a large amount of hydrogen compared with YSZ. Consequently, the SZY proton conductor may play an important role in the supply/storage of adsorbed hydrogen, or in increasing the oxidation resistance of Ni under low hydrogen concentration conditions.

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Technological challenges in the application of proton conducting ceramics

Cited by 508 publications

References 22 publications

Correlation between Thermal Properties, Electrical Conductivity, and Crystal Structure in the BaCe_0.80Y_0.20O_2.9 Proton Conductor

Correlation between Thermal Properties, Electrical Conductivity, and Crystal Structure in the BaCe_0.80Y_0.20O_2.9 Proton Conductor

Experiment and Analysis of Mass Transfer in SrCe0.95Yb0.05O3-a Fuel Cell using Complex Impedance Plot

Power generation characteristics of a SOFC with a Ni/YSZ anode incorporating a SrZr<sub>0.95</sub>Y<sub>0.05</sub>O<sub>3-α</sub> proton conductor

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Technological challenges in the application of proton conducting ceramics

Cited by 508 publications

References 22 publications

Correlation between Thermal Properties, Electrical Conductivity, and Crystal Structure in the BaCe0.80Y0.20O2.9 Proton Conductor

Correlation between Thermal Properties, Electrical Conductivity, and Crystal Structure in the BaCe0.80Y0.20O2.9 Proton Conductor

Experiment and Analysis of Mass Transfer in SrCe0.95Yb0.05O3-a Fuel Cell using Complex Impedance Plot

Power generation characteristics of a SOFC with a Ni/YSZ anode incorporating a SrZr<sub>0.95</sub>Y<sub>0.05</sub>O<sub>3-α</sub> proton conductor

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Correlation between Thermal Properties, Electrical Conductivity, and Crystal Structure in the BaCe_0.80Y_0.20O_2.9 Proton Conductor

Correlation between Thermal Properties, Electrical Conductivity, and Crystal Structure in the BaCe_0.80Y_0.20O_2.9 Proton Conductor