A core-shell structured in-situ-reaction synthesized Ce0.8Gd0.2±xO1.90 ±δ@BaCe0.9Gd0.1±yO2.95±δ powder and the electrical conductivity of its sintering body

被引：0

作者：

Zeng, Weixin ^{[1
,2
]}

Meng, Bin ^{[1
,2
]}

Ping, Xinyu ^{[1
,2
]}

Fang, Congcong ^{[1
,2
]}

Chai, Ziran ^{[1
,2
]}

Wang, Zhenteng ^{[1
,2
]}

Lu, Xing ^{[1
,2
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China

[2] Kunming Univ Sci & Technol, Key Lab Adv Mat Yunnan Prov, Kunming 650093, Yunnan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2025年 / 51卷 / 03期

关键词：

Core-shell structure; In-situ reaction; Electrical conductivity; CEO-BaCeO; based electrolyte; OXIDE FUEL-CELLS; COMPOSITE ELECTROLYTES; CERIA ELECTROLYTES; ZIRCONIA;

D O I：

10.1016/j.ceramint.2024.11.272

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A core-shell structured powder of Ce0.8Gd0.2 +/- xO1.90 +/-delta@BaCe0.9Gd0.1 +/- yO2.95 +/- delta (GDC@BCG) was synthesized by an in-situ reaction method and then sintered at 1600 degrees C for 10 h to prepare the corresponding GDC@BCG ceramic. There are only two phases of GDC and BCG in the sintered block. HR-TEM results show that the BCG shell generated by the in-situ reaction method is mostly coated on the GDC core to form a core-shell structure. At degrees 600 C, the electrical conductivity of the core-shell structured GDC@BCG ceramic reaches 1.0 x 10-2 S/cm in air and 1.3 x 10-2 S/cm in hydrogen, which is significantly higher than that of other conventional GDC-BCG composite ceramics owe to the continuous high conductive GDC/BCG heterointerface built by the core-shell structure. The core-shell structured GDC@BCG ceramic is a promising electrolyte candidate especially in the range of low and medium temperature, which provides a new strategy for the design of novel electrolytes.

引用

页码：2956 / 2965

页数：10