Gadolinia-doped ceria mixed with alkali carbonates for SOFC applications: II - An electrochemical insight

被引：67

作者：

Benamira, M. ^{[1
]}

Ringuede, A. ^{[1
]}

Hildebrandt, L. ^{[2
]}

Lagergren, C. ^{[2
]}

Vannier, R-N ^{[3
]}

Cassir, M. ^{[1
]}

机构：

[1] Chim ParisTech, CNRS, UMR 7575, LECIME, F-75231 Paris 05, France

[2] KTH Royal Inst Technol, Dept Chem Engn & Technol, SE-10044 Stockholm, Sweden

[3] Univ Lille 1, Ctr Hyperfrequences & Semicond, CNRS, Unite Catalyse & Chim Solide,UMR 8181, F-59655 Villeneuve Dascq, France

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 24期

关键词：

SOFC; Composite; Alkali molten carbonates; Gadolinia-doped ceria; Conductivity; Electrochemical analysis; LOW-TEMPERATURE SOFCS; OXIDE FUEL-CELLS; COMPOSITE ELECTROLYTES; ELECTRICAL-PROPERTIES; SDC; PERFORMANCE; CATHODES;

D O I：

10.1016/j.ijhydene.2011.10.062

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：

Composite materials based on gadolinia-doped ceria (GDC) and alkali carbonates (Li2CO3-K2CO3 or Li2CO3-Na2CO3) are potential electrolytes for low temperature solid oxide fuel cell applications (LTSOFC). This paper completes a first one dedicated to the thermal, structural and morphological study of such compounds; it is fully focussed on their electrical/electrochemical properties in different conditions, temperature, composition and gaseous atmosphere (oxidative or reductive). The influence of the gaseous composition on the Arrhenius conductivity plots is evidenced, in particular under hydrogen atmosphere. Finally, electrical conductivity determined by impedance spectroscopy is presented as a function of time to highlight the stability of such composites over 6000 h. First results on single cells showed performance at 600 degrees C of 60 mW cm(-2). Copyright (c) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：19371 / 19379

页数：9

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