authors |
Lapa, CM; Figueiredo, FML; de Souza, DPF; Song, L; Zhu, B; Marques, FMB |
nationality |
International |
journal |
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY |
author keywords |
Composite electrolytes; Samaria-doped ceria; Alkali carbonates; Nanosized ceria; Microstructural characterization; Impedance spectroscopy |
keywords |
ITSOFC APPLICATIONS; IONIC-CONDUCTIVITY; FUEL-CELL; CONDUCTORS; POWDER |
abstract |
Samaria-doped ceria-based composites with a 2:1 addition of Li and Na carbonates (or simple Na carbonate as admixture) were prepared mixing nanosized powders of the ceramic phase with the remaining constituents. Samples fired at relatively low temperatures (below 700 degrees C) were characterized by X-ray diffraction, scanning electron microscopy combined with energy dispersive spectroscopy and impedance spectroscopy in air. These composites showed a complex but homogeneous distribution of both phases, with one ceramic skeleton of bonded nanosized grains surrounded by the carbonate-based phase. Impedance spectroscopy data was used to confirm the impressive electrical conductivity of these materials, but also to put into evidence the complex nature of the charge transport process, clearly deviating from classical electrolytes. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved. |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
issn |
0360-3199 |
year published |
2010 |
volume |
35 |
issue |
7 |
beginning page |
2953 |
ending page |
2957 |
digital object identifier (doi) |
10.1016/j.ijhydene.2009.05.036 |
web of science category |
Chemistry, Physical; Electrochemistry; Energy & Fuels |
subject category |
Chemistry; Electrochemistry; Energy & Fuels |
unique article identifier |
WOS:000276692800072
|