Performance of homogeneous and layered ceria/carbonate composite electrolytes

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abstract

Multilayer ceramic and salt composite cells were prepared superimposing up to seven alternate layers of Ce0.9Gd0.1O1.95 (CGO) and mixtures of Na2CO3 (NC) and Li2CO3 (LC), with final sintering around 500 degrees C. Various other single component cells (CGO or NC + LC) and homogeneous composites (consisting of intimate mixtures of ceramics and salts) were prepared and used as reference. All these materials were characterized by X-ray diffraction, scanning electronic microscopy and impedance spectroscopy, in air. The layered cells electrical performance was studied both as series or parallel associations to try to inspect the specific electrical performance of the ceramic/salt interface. The multilayer cells resistance showed a close agreement with prediction based on classical series or parallel association models, and no sign of special contributions originated in the ceramic/salt interface. However, the electrode impedance appeared quite distinct for the various types of cells under analysis (single component, homogeneous and layered composites). This indeed suggests that interfaces play a role on the overall cell performance. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

keywords

LOW-TEMPERATURE SOFCS; FUEL-CELL SYSTEM; DOPED CERIA; ELECTRICAL-PROPERTIES; ANODE

subject category

Chemistry; Electrochemistry; Energy & Fuels

authors

Saradha, T; Fereira, AS; Patricio, SG; Figueiredo, FML; Marques, FMB

our authors

foto Fernando Manuel Bico Marques

Fernando Manuel Bico Marques

Full professor
foto Filipe Miguel H Lebre R Figueiredo

Filipe Miguel H Lebre R Figueiredo

Principal Researcher
foto Sónia Gonçalves Patrício

Sónia Gonçalves Patrício

Assistant Researcher

Groups

G3 - Electrochemical Materials, Interfaces and Coatings
G5 - Biomimetic, Biological and Living Materials

Projects

NANOCELL - Nanocomposite Electrolytes for Intermediate Temperature Fuel Cells (PTDC/CTM/098486/2008)

NANOCOFC - Enhancement of research capabilities on multi-functional Nanocomposites for advanced fuel cell Technology through EU-Turkish-China Cooperation (NANOCOFC)

acknowledgements

Financial support from Project NANOCELL, PTDC/CTM/098486/2008, FCT/COMPETE/FEDER (Portugal), and Project NANOCOFC, NMP3-CT-2007-032308, CEC (Brussels) is greatly appreciated. Professor Mahmut D. Mat, from Nigde University (Turkey), kindly provided the CGO tapes.

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Publication Details

type
Journal Article
year
2012
journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
volume
37
publisher
PERGAMON-ELSEVIER SCIENCE LTD
issn
0360-3199
issue
8
digital object identifier
10.1016/j.ijhydene.2011.11.013
web of science article identifier
WOS:000303952300097

Journal Metrics (JCR 2019)

Journal Impact Factor
4.939
Journal Impact Factor (5 yrs)
4.469
category normalized journal percentile
73.237

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