A facile method to fabricate proton-conducting BaZr0·85Y0·15O3-δ electrolyte with a large grain size and high conductivity

Lin Ge; Jiahui Jiao; Zongchao zhu; Qixi Zhang; Yifeng Zheng; Han Chen; Lucun Guo

doi:10.1016/j.ceramint.2019.08.202

A facile method to fabricate proton-conducting BaZr_0·85Y_0·15O_3-δ electrolyte with a large grain size and high conductivity

Lin Ge, Jiahui Jiao, Zongchao zhu, Qixi Zhang, Yifeng Zheng, Han Chen, Lucun Guo

College of Materials Science and Engineering

Nanjing Tech University

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

16 Scopus citations

Abstract

Y-doped BaZrO₃ has been widely investigated as an electrolyte material for intermediate-temperature solid oxide fuel cells, However, its poor sinterability and high grain boundary resistance are major barriers to its practical application. In the present research, large-grained and high-conductive BaZr_0·85Y_0·15O_3-δ (BZY15) electrolytes are fabricated via a facile method using Ba(NO₃)₂ and (ZrO₂)_0·92(Y₂O₃)_0.08 as the starting materials. For comparison, BaCO₃ and Ba(CH₃COO)₂ are also used as Ba sources to prepare BZY15. Micro-analysis indicates that BZY15 powders with large particle sizes and a homogenous morphology could be obtained at very low temperature due to the liquid phase environment provided by Ba(NO₃)₂. The Ba(NO₃)₂-derived pellet presents a homogeneous composition, in contrast to the Y segregation observed in the BaCO₃- and Ba(CH₃COO)₂-derived pellets after sintering. Moreover, the widely used sintering aid, NiO, could further improve the sinterability and electrical properties of BZY15. The resulting BZY15 electrolyte shows a high conductivity of 3.9 × 10⁻³ S cm⁻¹ at 600 °C.

Original language	English
Pages (from-to)	24946-24952
Number of pages	7
Journal	Ceramics International
Volume	45
Issue number	18
DOIs	https://doi.org/10.1016/j.ceramint.2019.08.202
State	Published - 15 Dec 2019

Keywords

Ba source
BaZrO
Conductivity
Electrolyte
Proton conductor

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10.1016/j.ceramint.2019.08.202

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title = "A facile method to fabricate proton-conducting BaZr0·85Y0·15O3-δ electrolyte with a large grain size and high conductivity",

abstract = "Y-doped BaZrO3 has been widely investigated as an electrolyte material for intermediate-temperature solid oxide fuel cells, However, its poor sinterability and high grain boundary resistance are major barriers to its practical application. In the present research, large-grained and high-conductive BaZr0·85Y0·15O3-δ (BZY15) electrolytes are fabricated via a facile method using Ba(NO3)2 and (ZrO2)0·92(Y2O3)0.08 as the starting materials. For comparison, BaCO3 and Ba(CH3COO)2 are also used as Ba sources to prepare BZY15. Micro-analysis indicates that BZY15 powders with large particle sizes and a homogenous morphology could be obtained at very low temperature due to the liquid phase environment provided by Ba(NO3)2. The Ba(NO3)2-derived pellet presents a homogeneous composition, in contrast to the Y segregation observed in the BaCO3- and Ba(CH3COO)2-derived pellets after sintering. Moreover, the widely used sintering aid, NiO, could further improve the sinterability and electrical properties of BZY15. The resulting BZY15 electrolyte shows a high conductivity of 3.9 × 10−3 S cm−1 at 600 °C.",

keywords = "Ba source, BaZrO, Conductivity, Electrolyte, Proton conductor",

author = "Lin Ge and Jiahui Jiao and Zongchao zhu and Qixi Zhang and Yifeng Zheng and Han Chen and Lucun Guo",

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T1 - A facile method to fabricate proton-conducting BaZr0·85Y0·15O3-δ electrolyte with a large grain size and high conductivity

AU - Ge, Lin

AU - Jiao, Jiahui

AU - zhu, Zongchao

AU - Zhang, Qixi

AU - Zheng, Yifeng

AU - Chen, Han

AU - Guo, Lucun

PY - 2019/12/15

Y1 - 2019/12/15

N2 - Y-doped BaZrO3 has been widely investigated as an electrolyte material for intermediate-temperature solid oxide fuel cells, However, its poor sinterability and high grain boundary resistance are major barriers to its practical application. In the present research, large-grained and high-conductive BaZr0·85Y0·15O3-δ (BZY15) electrolytes are fabricated via a facile method using Ba(NO3)2 and (ZrO2)0·92(Y2O3)0.08 as the starting materials. For comparison, BaCO3 and Ba(CH3COO)2 are also used as Ba sources to prepare BZY15. Micro-analysis indicates that BZY15 powders with large particle sizes and a homogenous morphology could be obtained at very low temperature due to the liquid phase environment provided by Ba(NO3)2. The Ba(NO3)2-derived pellet presents a homogeneous composition, in contrast to the Y segregation observed in the BaCO3- and Ba(CH3COO)2-derived pellets after sintering. Moreover, the widely used sintering aid, NiO, could further improve the sinterability and electrical properties of BZY15. The resulting BZY15 electrolyte shows a high conductivity of 3.9 × 10−3 S cm−1 at 600 °C.

AB - Y-doped BaZrO3 has been widely investigated as an electrolyte material for intermediate-temperature solid oxide fuel cells, However, its poor sinterability and high grain boundary resistance are major barriers to its practical application. In the present research, large-grained and high-conductive BaZr0·85Y0·15O3-δ (BZY15) electrolytes are fabricated via a facile method using Ba(NO3)2 and (ZrO2)0·92(Y2O3)0.08 as the starting materials. For comparison, BaCO3 and Ba(CH3COO)2 are also used as Ba sources to prepare BZY15. Micro-analysis indicates that BZY15 powders with large particle sizes and a homogenous morphology could be obtained at very low temperature due to the liquid phase environment provided by Ba(NO3)2. The Ba(NO3)2-derived pellet presents a homogeneous composition, in contrast to the Y segregation observed in the BaCO3- and Ba(CH3COO)2-derived pellets after sintering. Moreover, the widely used sintering aid, NiO, could further improve the sinterability and electrical properties of BZY15. The resulting BZY15 electrolyte shows a high conductivity of 3.9 × 10−3 S cm−1 at 600 °C.

KW - Ba source

KW - BaZrO

KW - Conductivity

KW - Electrolyte

KW - Proton conductor

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VL - 45

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JO - Ceramics International

JF - Ceramics International

IS - 18

ER -

A facile method to fabricate proton-conducting BaZr_0·85Y_0·15O_3-δ electrolyte with a large grain size and high conductivity

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