Electrical Conductivity and Microstructure of NiO-CGO Composites Prepared by One-Step Synthesis

被引：3

作者：

Macedo, D. A. ^{[1
]}

Figueiredo, F. M. L. ^{[2
]}

Patricio, S. G. ^{[2
]}

Nascimento, R. M. ^{[1
]}

Martinelli, A. E. ^{[1
]}

Paskocimas, C. A. ^{[1
]}

Marques, F. M. B. ^{[2
]}

机构：

[1] Univ Fed Rio Grande do Norte, PPGCEM, BR-59072970 Natal, RN, Brazil

[2] Univ Aveiro, CICECO, Dept Mat & Ceram Engn, P-3810193 Aveiro, Portugal

来源：

NANOTECHNOLOGY (GENERAL) - 222ND ECS MEETING/PRIME 2012 | 2013年 / 50卷 / 22期

关键词：

OXIDE FUEL-CELLS; ANODE MATERIALS; TRANSPORT; POWDERS;

D O I：

10.1149/05022.0021ecst

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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).

引用

页码：21 / 31

页数：11

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