Structural and electrochemical properties of dense yttria-doped barium zirconate prepared by solid-state reactive sintering

Dae Sik Yun; Jaegyeom Kim; Seung Joo Kim; Jong Heun Lee; Jong Nam Kim; Hyung Chul Yoon; Ji Haeng Yu; Minseok Kwak; Hana Yoon; Younghyun Cho; Chung Yul Yoo

doi:10.3390/en11113083

Structural and electrochemical properties of dense yttria-doped barium zirconate prepared by solid-state reactive sintering

Dae Sik Yun, Jaegyeom Kim, Seung Joo Kim, Jong Heun Lee, Jong Nam Kim, Hyung Chul Yoon, Ji Haeng Yu, Minseok Kwak, Hana Yoon, Younghyun Cho, Chung Yul Yoo

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

32 Citations (Scopus)

Abstract

For practical utilization of proton-conducting ceramic fuel cells and electrolyzers, it is essential to lower the sintering temperature and processing time of BaZrO₃-based proton conductors. We investigated the effect of sintering temperature and time on the structural and electrochemical properties of dense BaZr0.8Y0.2O3 (BZY) prepared by a solid-state reactive sintering process, using NiO as a sintering aid. The sintered BZY prepared from the micronized precursor powder exhibited a density higher than 93%, and an average grain size in the range of 0.6 to 1.4 μm. The orthorhombic BaY2NiO5 phase was also observed in the sintered BZY from the combined conventional and synchrotron X-ray diffraction measurements. Electrochemical impedance spectroscopy showed that the total proton conductivities of BZY can be modulated by sintering temperature in a wet reducing atmosphere. The maximum total ion transport number achieved was 0.89 at 600 °C, and the maximum power density of the symmetric BZY electrolyte supported cell with Pt electrodes was 5.24 mWcm-2 at 900 °C.

Original language	English
Article number	3083
Journal	Energies
Volume	11
Issue number	11
DOIs	https://doi.org/10.3390/en11113083
Publication status	Published - 2018 Nov

Bibliographical note

Funding Information:
Funding: This work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (B8-2461-02). This work was also supported by the Soonchunhyang University Research Fund. Dr. Laura Navarrete (Universidad Politécnica de Valencia, Spain) and Jong Hyun Park (Chungnam National University) are gratefully acknowledged for the EIS measurements and analysis.

Publisher Copyright:
© 2018 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

BaZrO
Electrochemical properties
Proton-conducting oxides
Solid-state reactive sintering

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Energy (miscellaneous)
Control and Optimization
Electrical and Electronic Engineering

UN SDGs

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

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10.3390/en11113083

Cite this

@article{b74f244fc97b43a190bbd7751df34693,

title = "Structural and electrochemical properties of dense yttria-doped barium zirconate prepared by solid-state reactive sintering",

abstract = "For practical utilization of proton-conducting ceramic fuel cells and electrolyzers, it is essential to lower the sintering temperature and processing time of BaZrO3-based proton conductors. We investigated the effect of sintering temperature and time on the structural and electrochemical properties of dense BaZr0.8Y0.2O3 (BZY) prepared by a solid-state reactive sintering process, using NiO as a sintering aid. The sintered BZY prepared from the micronized precursor powder exhibited a density higher than 93%, and an average grain size in the range of 0.6 to 1.4 μm. The orthorhombic BaY2NiO5 phase was also observed in the sintered BZY from the combined conventional and synchrotron X-ray diffraction measurements. Electrochemical impedance spectroscopy showed that the total proton conductivities of BZY can be modulated by sintering temperature in a wet reducing atmosphere. The maximum total ion transport number achieved was 0.89 at 600 °C, and the maximum power density of the symmetric BZY electrolyte supported cell with Pt electrodes was 5.24 mWcm-2 at 900 °C.",

keywords = "BaZrO, Electrochemical properties, Proton-conducting oxides, Solid-state reactive sintering",

author = "Yun, {Dae Sik} and Jaegyeom Kim and Kim, {Seung Joo} and Lee, {Jong Heun} and Kim, {Jong Nam} and Yoon, {Hyung Chul} and Yu, {Ji Haeng} and Minseok Kwak and Hana Yoon and Younghyun Cho and Yoo, {Chung Yul}",

note = "Funding Information: Funding: This work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (B8-2461-02). This work was also supported by the Soonchunhyang University Research Fund. Dr. Laura Navarrete (Universidad Polit{\'e}cnica de Valencia, Spain) and Jong Hyun Park (Chungnam National University) are gratefully acknowledged for the EIS measurements and analysis. Publisher Copyright: {\textcopyright} 2018 by the authors. Licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/en11113083",

language = "English",

volume = "11",

journal = "Energies",

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AU - Yun, Dae Sik

AU - Kim, Jaegyeom

AU - Kim, Seung Joo

AU - Lee, Jong Heun

AU - Kim, Jong Nam

AU - Yoon, Hyung Chul

AU - Yu, Ji Haeng

AU - Kwak, Minseok

AU - Yoon, Hana

AU - Cho, Younghyun

AU - Yoo, Chung Yul

N1 - Funding Information: Funding: This work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (B8-2461-02). This work was also supported by the Soonchunhyang University Research Fund. Dr. Laura Navarrete (Universidad Politécnica de Valencia, Spain) and Jong Hyun Park (Chungnam National University) are gratefully acknowledged for the EIS measurements and analysis. Publisher Copyright: © 2018 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2018/11

Y1 - 2018/11

N2 - For practical utilization of proton-conducting ceramic fuel cells and electrolyzers, it is essential to lower the sintering temperature and processing time of BaZrO3-based proton conductors. We investigated the effect of sintering temperature and time on the structural and electrochemical properties of dense BaZr0.8Y0.2O3 (BZY) prepared by a solid-state reactive sintering process, using NiO as a sintering aid. The sintered BZY prepared from the micronized precursor powder exhibited a density higher than 93%, and an average grain size in the range of 0.6 to 1.4 μm. The orthorhombic BaY2NiO5 phase was also observed in the sintered BZY from the combined conventional and synchrotron X-ray diffraction measurements. Electrochemical impedance spectroscopy showed that the total proton conductivities of BZY can be modulated by sintering temperature in a wet reducing atmosphere. The maximum total ion transport number achieved was 0.89 at 600 °C, and the maximum power density of the symmetric BZY electrolyte supported cell with Pt electrodes was 5.24 mWcm-2 at 900 °C.

AB - For practical utilization of proton-conducting ceramic fuel cells and electrolyzers, it is essential to lower the sintering temperature and processing time of BaZrO3-based proton conductors. We investigated the effect of sintering temperature and time on the structural and electrochemical properties of dense BaZr0.8Y0.2O3 (BZY) prepared by a solid-state reactive sintering process, using NiO as a sintering aid. The sintered BZY prepared from the micronized precursor powder exhibited a density higher than 93%, and an average grain size in the range of 0.6 to 1.4 μm. The orthorhombic BaY2NiO5 phase was also observed in the sintered BZY from the combined conventional and synchrotron X-ray diffraction measurements. Electrochemical impedance spectroscopy showed that the total proton conductivities of BZY can be modulated by sintering temperature in a wet reducing atmosphere. The maximum total ion transport number achieved was 0.89 at 600 °C, and the maximum power density of the symmetric BZY electrolyte supported cell with Pt electrodes was 5.24 mWcm-2 at 900 °C.

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KW - Proton-conducting oxides

KW - Solid-state reactive sintering

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DO - 10.3390/en11113083

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AN - SCOPUS:85057823466

SN - 1996-1073

VL - 11

JO - Energies

JF - Energies

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M1 - 3083

ER -

Structural and electrochemical properties of dense yttria-doped barium zirconate prepared by solid-state reactive sintering

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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