首页|Aligned nanofibers incorporated composite solid electrolyte for high-sensitivity oxygen sensing at medium temperatures

Aligned nanofibers incorporated composite solid electrolyte for high-sensitivity oxygen sensing at medium temperatures

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Potentiometric oxygen sensors have been widely used in internal combustion engines,industrial boilers,and metallurgical heat treatment furnaces.However,traditional oxygen sensors based on yttria-stabilized zirconia(YSZ)electrolyte can only be operated at elevated temperatures(＞750 ℃)due to their rela-tively low ionic conductivity.In this study,we present a highly efficient micro-oxygen sensor that can be operated at a temperature as low as 300 ℃.This micro-oxygen sensor incorporates a composite solid electrolyte,i.e.,well-aligned gadolinium-doped cerium oxide(CGO)nanofibers embedded within a YSZ matrix(YSZ/CGOf).The arrays of CGO nanofibers in the YSZ matrix are parallel to the conduction direc-tion,providing rapid conducting channels for oxygen ions.Benefitting from this design,the composite electrolyte leads to a conductivity of four times higher than that of traditional YSZ solid electrolytes at low temperatures.This enhancement in conductivity is attributed to the presence of a defective interfacial region between CGOf and YSZ,which promotes the mobility of oxygen ions.The strategy of constructing fast ionic conduction in the composite electrolyte by using well-aligned nanofibers may be considered for the design and optimization of other micro/nano-devices including sensors,batteries,and fuel cells.

Oxygen sensorNanofibersComposite electrolyteIonic conduction

Mengfei Zhang、Lei Yao、Yan Xing、Jing Cheng、Tianrang Yang、Jianguo Liu、Wei Pan

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Institute of Energy Power Innovation,North China Electric Power University,Beijing 102206,China

State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering Tsinghua University,Beijing 100084,China

Shenzhen Key Laboratory of Special Functional Materials,Shenzhen Engineering Laboratory for Advanced Technology of Ceramics,Guangdong Research Center for Interfacial Engineering of Functional Materials,College of Materials Science and Engineering Shenzhen University,Shenzhen 518060,China

New Energy Technology Engineering Lab of Jiangsu Province,School of Science,Nanjing University of Posts & Telecommunications(NUPT),Nanjing 210003,China

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中央高校基本科研业务费专项中央高校基本科研业务费专项国家自然科学基金国家自然科学基金国家自然科学基金

2023MS093JB2023106520731565220223491960104

2024

10.1016/j.jmst.2023.08.070

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.181(14)
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