Electrical properties and hydrogen flux performance of Sr(Ce0.6Zr0.4)1−xYxO3−Δ ceramic proton conductors

I. Ming Hung; Yen Juin Chiang; Yi Hung Wang; Jason S.C. Jang; Sheng Wei Lee

doi:10.1016/j.ijhydene.2017.06.072

Electrical properties and hydrogen flux performance of Sr(Ce_0.6Zr_0.4)_1−xY_xO_3−Δ ceramic proton conductors

I. Ming Hung, Yen Juin Chiang, Yi Hung Wang, Jason S.C. Jang, Sheng Wei Lee

Graduate Institute of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

In this study, Sr(Ce_0.6Zr_0.4)_1−xY_xO_3−δ (x = 0.1, 0.15, 0.2, 0.25, 0.3, SCZY) perovskite proton-conducting ceramics were synthesized using the citrate-ethylenediaminetetraacetic acid complexing method. The effect of the Y concentration on the crystal structure, electrochemical performance and hydrogen flux of the SCZY samples in air and a H₂ atmosphere were investigated. The sintered SCZY samples showed a main perovskite crystal structure with several SrY₂O₄ impurity phases when x ≥ 0.20. The grain size of SCZY samples when x = 0.25 and 0.30 was smaller than that of other samples. The conductivity of all samples increased as the temperature increased in both air and H₂; however, the conductivity of SCZY in H₂ was lower than that in air. The results of AC impedance, demonstrated that resistance mainly derived from the charge transfer, which was apparently higher than the bulk and grain boundary resistance. Sr(Ce_0.6Zr_0.4)_0.85Y_0.15O_3-δ exhibited low charge transfer resistance in both air and the H₂ atmosphere and had a high hydrogen flux of 0.34 ml min⁻¹ cm⁻² μm⁻¹ at 800 °C. The structures of all SCZY samples were stable in 80 °C water.

Original language	English
Pages (from-to)	22149-22158
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	42
Issue number	34
DOIs	https://doi.org/10.1016/j.ijhydene.2017.06.072
State	Published - 24 Aug 2017

Keywords

Atmosphere
Ceramics
Hydrogen flux
Phase stability
Proton

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2017.06.072

Development and design of materials, components and fabrication processes in IGFC for the utilization of CO2 and syngas( III )
Lin, J.-C. (PI)
1/01/16 → 28/02/17
Project: Research

Cite this

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title = "Electrical properties and hydrogen flux performance of Sr(Ce0.6Zr0.4)1−xYxO3−Δ ceramic proton conductors",

abstract = "In this study, Sr(Ce0.6Zr0.4)1−xYxO3−δ (x = 0.1, 0.15, 0.2, 0.25, 0.3, SCZY) perovskite proton-conducting ceramics were synthesized using the citrate-ethylenediaminetetraacetic acid complexing method. The effect of the Y concentration on the crystal structure, electrochemical performance and hydrogen flux of the SCZY samples in air and a H2 atmosphere were investigated. The sintered SCZY samples showed a main perovskite crystal structure with several SrY2O4 impurity phases when x ≥ 0.20. The grain size of SCZY samples when x = 0.25 and 0.30 was smaller than that of other samples. The conductivity of all samples increased as the temperature increased in both air and H2; however, the conductivity of SCZY in H2 was lower than that in air. The results of AC impedance, demonstrated that resistance mainly derived from the charge transfer, which was apparently higher than the bulk and grain boundary resistance. Sr(Ce0.6Zr0.4)0.85Y0.15O3-δ exhibited low charge transfer resistance in both air and the H2 atmosphere and had a high hydrogen flux of 0.34 ml min−1 cm−2 μm−1 at 800 °C. The structures of all SCZY samples were stable in 80 °C water.",

keywords = "Atmosphere, Ceramics, Hydrogen flux, Phase stability, Proton",

author = "Hung, {I. Ming} and Chiang, {Yen Juin} and Wang, {Yi Hung} and Jang, {Jason S.C.} and Lee, {Sheng Wei}",

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T1 - Electrical properties and hydrogen flux performance of Sr(Ce0.6Zr0.4)1−xYxO3−Δ ceramic proton conductors

AU - Hung, I. Ming

AU - Chiang, Yen Juin

AU - Wang, Yi Hung

AU - Jang, Jason S.C.

AU - Lee, Sheng Wei

PY - 2017/8/24

Y1 - 2017/8/24

N2 - In this study, Sr(Ce0.6Zr0.4)1−xYxO3−δ (x = 0.1, 0.15, 0.2, 0.25, 0.3, SCZY) perovskite proton-conducting ceramics were synthesized using the citrate-ethylenediaminetetraacetic acid complexing method. The effect of the Y concentration on the crystal structure, electrochemical performance and hydrogen flux of the SCZY samples in air and a H2 atmosphere were investigated. The sintered SCZY samples showed a main perovskite crystal structure with several SrY2O4 impurity phases when x ≥ 0.20. The grain size of SCZY samples when x = 0.25 and 0.30 was smaller than that of other samples. The conductivity of all samples increased as the temperature increased in both air and H2; however, the conductivity of SCZY in H2 was lower than that in air. The results of AC impedance, demonstrated that resistance mainly derived from the charge transfer, which was apparently higher than the bulk and grain boundary resistance. Sr(Ce0.6Zr0.4)0.85Y0.15O3-δ exhibited low charge transfer resistance in both air and the H2 atmosphere and had a high hydrogen flux of 0.34 ml min−1 cm−2 μm−1 at 800 °C. The structures of all SCZY samples were stable in 80 °C water.

AB - In this study, Sr(Ce0.6Zr0.4)1−xYxO3−δ (x = 0.1, 0.15, 0.2, 0.25, 0.3, SCZY) perovskite proton-conducting ceramics were synthesized using the citrate-ethylenediaminetetraacetic acid complexing method. The effect of the Y concentration on the crystal structure, electrochemical performance and hydrogen flux of the SCZY samples in air and a H2 atmosphere were investigated. The sintered SCZY samples showed a main perovskite crystal structure with several SrY2O4 impurity phases when x ≥ 0.20. The grain size of SCZY samples when x = 0.25 and 0.30 was smaller than that of other samples. The conductivity of all samples increased as the temperature increased in both air and H2; however, the conductivity of SCZY in H2 was lower than that in air. The results of AC impedance, demonstrated that resistance mainly derived from the charge transfer, which was apparently higher than the bulk and grain boundary resistance. Sr(Ce0.6Zr0.4)0.85Y0.15O3-δ exhibited low charge transfer resistance in both air and the H2 atmosphere and had a high hydrogen flux of 0.34 ml min−1 cm−2 μm−1 at 800 °C. The structures of all SCZY samples were stable in 80 °C water.

KW - Atmosphere

KW - Ceramics

KW - Hydrogen flux

KW - Phase stability

KW - Proton

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