Recent activity in the development of proton-conducting oxides for high-temperature applications

Кочетова, Н. А.; Анимица, И. Е.; Medvedev, Dmitry; Demin, A.; Tsiakaras, Panagiotis

doi:10.1039/c6ra13347a

Cited by 214 publications

(131 citation statements)

References 328 publications

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“…[1][2][3][4] Among these BaMO 3 (M = Ti, Zr, Ce) comprise a sub group of the A II B IV O 3 perovskites which display a wide range of functional properties. BaTiO 3 is one of the classic prototype ferroelectric materials with superior dielectric properties, while acceptor doped BaZrO 3 and BaCeO 3 possess proton conductivity and mixed ionic-electronic conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…BaTiO 3 is one of the classic prototype ferroelectric materials with superior dielectric properties, while acceptor doped BaZrO 3 and BaCeO 3 possess proton conductivity and mixed ionic-electronic conductivity. 2,4,5 These solid-state proton conductors have attracted considerable attention due to a range of electrochemical applications, such as fuel cells, gas separation membranes and steam electrolysers. 2,6 Given their importance, the properties of BaMO 3 have been extensively studied experimentally and by first principles calculations.…”

Section: Introductionmentioning

confidence: 99%

“…2,4,5 These solid-state proton conductors have attracted considerable attention due to a range of electrochemical applications, such as fuel cells, gas separation membranes and steam electrolysers. 2,6 Given their importance, the properties of BaMO 3 have been extensively studied experimentally and by first principles calculations. 2,4,5 The crystal structure of BaMO 3 perovskites is determined by the size of the M 4+ (M = Ti, Zr, Ce) cations, and the ambient crystal structure changes from tetragonal, to cubic and orthorhombic reflecting the variation in the Goldschmidt tolerance factor.…”

Section: Introductionmentioning

confidence: 99%

“…2,6 Given their importance, the properties of BaMO 3 have been extensively studied experimentally and by first principles calculations. 2,4,5 The crystal structure of BaMO 3 perovskites is determined by the size of the M 4+ (M = Ti, Zr, Ce) cations, and the ambient crystal structure changes from tetragonal, to cubic and orthorhombic reflecting the variation in the Goldschmidt tolerance factor. [2][3][4] The high sintering temperature for these oxide materials combined with the volatility of BaO give rise to an interesting defect chemistry as discussed extensively for BaZrO 3 where Ba-deficiency is of importance for the material stability and the mobility of A-cations.…”

Section: Introductionmentioning

confidence: 99%

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134Ba diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce)

et al. 2017

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Cation diffusion in functional oxide materials is of fundamental interest, particularly in relation to interdiffusion of cations in thin film heterostructures and chemical stability of materials in high temperature electrochemical devices. Here we report on 134Ba tracer diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce) materials. The dense BaMO3 ceramics were prepared by solid state sintering, and thin films of 134BaO were deposited on the polished pellets by drop casting of an aqueous solution containing the Ba-tracer. The samples were subjected to thermal annealing and the resulting isotope distribution profiles were recorded by secondary ion mass spectrometry. The depth profiles exhibited two distinct regions reflecting lattice and grain boundary diffusion. The grain boundary diffusion was found to be 4-5 orders of magnitude faster than the lattice diffusion for all three materials. The temperature dependence of the lattice and grain boundary diffusion coefficients followed an Arrhenius type behaviour, and the activation energy and pre-exponential factor demonstrated a clear correlation with the size of the primitive unit cell of the three perovskites. Diffusion of Ba via Ba-vacancies was proposed as the most likely diffusion mechanism.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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134Ba diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce)

et al. 2017

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“…6) 8) In particular, yttrium and ytterbium co-doped BaZr 0.1 -Ce 0.7 Y 0.1 Yb 0.1 O 3¹d (BZCYYb) has been reported as the highest proton conducting material among the acceptor-doped-type proton conductors. 9)11) In some reports, the chemical stability of BZCYYb was improved by adding multi-dopants into the cerate-based system, resulting to stability of BZCYYb even in CO 2 atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Decomposition reaction of BaZr0.1Ce0.7Y0.1Yb0.1O3−δ in carbon dioxide atmosphere with nickel sintering aid

Ishiyama

Kishimoto

Develos-Bagarinao

et al. 2017

J. Ceram. Soc. Japan

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The perovskite-type proton conductor with the composition of BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3¹¤ (BZCYYb) has been reported to exhibit the highest proton conductivity among proton conductors. However, cerate-based perovskite materials such as BZCYYb are also known to react with carbon dioxide which causes phase decomposition through the formation of barium carbonate. This is a significant issue because chemical stability is an important property to enable these materials to be utilized for fuel cell applications. In this study, the chemical stability of BZCYYb was investigated in CO 2 or CO 2 + H 2 atmosphere, with or without nickel addition as sintering aid. Some nickel addition is assumed to occur from nickel diffusion in anode-support-type fuel cells. The enhancement of reactivity with carbon dioxide species by adding nickel into BZCYYb was attributed to barium enrichment at grain boundary regions and the formation of an impurity phase of Ba(Y (1¹x) Yb x ) 2 NiO 5 . Moreover, different decomposition reactions depending on the atmosphere have been inferred. In a pure CO 2 atmosphere, barium carbonate formation occurred without appearance of the CeO 2 -based phase, in other words, without decomposition of the perovskite phase. On the other hand, in hydrogen-containing CO 2 atmosphere, both the barium carbonate and CeO 2 -based phase were observed.

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Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Wang

Medvedev

Shao

2018

Adv Funct Materials

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Fuel cells and electrolysis cells as important types of energy conversiondevices can be divided into groups based on the electrolyte material. However, solid oxide cells (SOCs) based on conventional oxygen-ion conductors are limited by several issues, such as high operating temperature, the difficulty of hydrogen purification from water, and inferior stability. To avoid these problems, proton-conducting oxides are proposed as electrolytes for SOCs in electrolysis and fuel cell modes. Since water vapor partial pressure (pH 2 O) is one of the main parameters determining the proton concentration in proton-conducting oxides (characteristics of which can be either improved or deteriorated), the pH 2 O control is extremely important for the optimization of the devices' performance and stability. This review provides an overview of the research progresses made for proton-conducting SOCs, especially for the impact of gas humidification on the operability and performance. Fundamental understanding of the main processes in proton-conducting SOCs and design principles for the key components are summarized and discussed. The trends, challenges, and future directions that exist in this dynamic field are also pointed out. This review will inspire interest from various disciplines and provide some useful guidelines for future development of proton-conductor-based energy storage and conversion systems.

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Recent activity in the development of proton-conducting oxides for high-temperature applications

Abstract: This review describes the recent achievements in research and development of high-temperature proton-conducting materials, providing useful information for their eventual application in intermediate- and high-temperature electrochemical devices.

Cited by 214 publications

References 328 publications

134Ba diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce)

134Ba diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce)

Decomposition reaction of BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3−δ</sub> in carbon dioxide atmosphere with nickel sintering aid

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

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Recent activity in the development of proton-conducting oxides for high-temperature applications

Abstract: This review describes the recent achievements in research and development of high-temperature proton-conducting materials, providing useful information for their eventual application in intermediate- and high-temperature electrochemical devices.

Cited by 214 publications

References 328 publications

134Ba diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce)

134Ba diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce)

Decomposition reaction of BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3&minus;&delta;</sub> in carbon dioxide atmosphere with nickel sintering aid

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

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Decomposition reaction of BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3−δ</sub> in carbon dioxide atmosphere with nickel sintering aid