Proton transport in unsintered BaCe_(0.8)Y_(0.2)O_(3-α) for easily prepared electrochemical devices  

作　　者：Xi Wang Yushi Ding Ying Li Gaopeng Zhou Wenlong Huang 

机构地区：[1]Liaoning Key Laboratory for Metallurgical Sensor Material and Technology,School of Metallurgy,Northeastern University,Shenyang,110819,China

出　　处：《Journal of Rare Earths》2025年第1期133-145,I0006,共14页稀土学报(英文版)

基　　金：Project supported by the National Natural Science Foundation of China(51834004,51704063,52004057,51774076);the Fundamental Research Funds for the Central Universities(N2225018,N2325006,N2325027);Joint Fund of Henan Province Science and Technology R&D Program(225200810035)。

摘　　要：BaCe_(0.8)Y_(0.2)O_(3)-αceramics exhibit superior conductivity among related materials.However,the hightemperature sintering makes it difficult to prepare electrochemical devices with a BaCe_(0.8)Y_(0.2)O_(3)-αmultilayer film,and very few studies have examined the conductivity and transport properties of unsintered BaCe_(0.8)Y_(0.2)O_(3)-α.In nominally dry conditions,the instability of this material in a watercontaining atmosphere can be minimized,allowing the unsintered BaCe_(0.8)Y_(0.2)O_(3)-αto be applied in some particular test environment as a component of electrochemical devices.Hence,the conductivity of unsintered BaCe_(0.8)Y_(0.2)O_(3)-αin dry conditions was measured via AC impedance spectroscopy in the temperature range of 500-800℃.The unsintered BaCe_(0.8)Y_(0.2)O_(3)-αexhibits high conductivity and hydration ability,as well as low proton activation energy.In addition,it shows high oxygen vacancy and low proton transport numbers at high temperature,limited by its grain boundaries.This work provides insights into the conductivity and proton transport of unsintered BaCe_(0.8)Y_(0.2)O_(3)-αand demonstrates its potential as a proton-conducting electrolyte.

关 键 词：Protonic conductor Unsintered material BaCe_(0.8)Y_(0.2)0^(3-α) CONDUCTIVITY Transport number Rare earths 

分 类 号：O57[理学—粒子物理与原子核物理]