|
authors |
Macedo, DA; Figueiredo, FML; Patricio, SG; Nascimento, RM; Martinelli, AE; Paskocimas, CA; Marques, FMB |
|
editors |
Leonte, OM; Mustain, WE |
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nationality |
International |
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journal |
NANOTECHNOLOGY (GENERAL) - 222ND ECS MEETING/PRIME 2012 |
|
keywords |
OXIDE FUEL-CELLS; ANODE MATERIALS; TRANSPORT; POWDERS |
|
abstract |
The correlation between the microstructure and electrical properties of NiO-Ce0.9Gd0.1O1.95 (NiO-CGO) composites prepared by a one-step synthesis method is reported in the present work, and compared to conventional samples synthesized by mechanically mixing commercial powders. Samples sintered between 1350 and 1450 degrees C had their microstructures and electrical properties investigated by scanning electron microscopy (SEM) and impedance spectroscopy. The total electrical conductivity in the range of 100 -500 degrees C of one-step composites is more than one order of magnitude higher than for conventional material. This result is associated to the presence of a network of well-connected and homogeneously distributed NiO grains shown by SEM for the one-step composite, which is responsible for its improved percolative behavior and lower activation energy (0.24 eV at 250 - 650 degrees C). |
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publisher |
ELECTROCHEMICAL SOC INC |
|
issn |
1938-5862 |
|
isbn |
978-1-60768-410-7 |
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year published |
2013 |
|
volume |
50 |
|
issue |
22 |
|
beginning page |
21 |
|
ending page |
31 |
|
digital object identifier (doi) |
10.1149/05022.0021ecst |
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web of science category |
Electrochemistry; Nanoscience & Nanotechnology |
|
subject category |
Electrochemistry; Science & Technology - Other Topics |
|
unique article identifier |
WOS:000338026300004
|
