Interfacial studies of solid-state cells based on electrolytes of mixed ionic-electronic conductors

被引:25
作者
Hu, HX [1 ]
Liu, ML [1 ]
机构
[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
关键词
interfaces; mixed conductors; MIEC; 4-probe measurement; electrode kinetics;
D O I
10.1016/S0167-2738(98)00095-2
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Combination of 4-probe impedance and polarization measurements offers an effective approach to investigate electrode kinetics and transport properties of each cell component in a solid-state electrochemical cell based on an electrolyte of mixed ionic-electronic conductor (MIEC). In particular, two representative solid-state cells, one with an electrolyte of an MIEC (Pt /BaCe0.8Gd0.2O3/ Pt) and the other with an electrolyte of an ionic conductor (Pt /Bi1.5Y0.5O3/ Pt), are used as examples to demonstrate the uniqueness of these techniques in separating the response of each cell component, in measuring the interfacial polarization resistance and overpotential of each individual interface, in identifying reaction mechanisms (the nature of rate-limiting steps), and in determining kinetic parameters. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
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页码:259 / 272
页数:14
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