Influence of grain boundary interface on ionic conduction of (Zn1-x,Cox)O

被引：5

作者：

Shawuti, Shalima ^{[1
]}

Can, Musa Mutlu ^{[1
,2
,3
]}

Gulgun, Mehmet Ali ^{[1
]}

Kaneko, Satoru ^{[4
]}

Endo, Tamio ^{[5
]}

机构：

[1] Sabanci Univ, Fac Engn & Nat Sci, TR-34359 Istanbul, Turkey

[2] Istanbul Univ, Fac Sci, Dept Phys, Renewable Energy & Oxide Hybride Syst Lab, TR-34314 Istanbul, Turkey

[3] Sabanci Univ, Nanotechnol Res & Applicat Ctr, TR-34956 Istanbul, Turkey

[4] Kanagawa Inst Ind Sci & Technol KISTE, Ebina, Kanagawa, Japan

[5] SIC, Sagamihara Surface Treatment Lab, Sagamihara, Kanagawa 2520243, Japan

来源：

COMPOSITES PART B-ENGINEERING | 2018年 / 147卷

关键词：

Activation energy for ionic conduction; Oxide semiconductor of (Zn1-xCox)O system; Low temperature solid oxide fuel cells; FREQUENCY DIELECTRIC-RELAXATION; ZNO; SIZE; SPECTROSCOPY; CATHODE;

D O I：

10.1016/j.compositesb.2017.04.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the effect of Co atoms, doped into ZnO lattice, on ionic conductivity in the internal grains or through the grain boundaries. Influence of Co amount on the conductivity was associated with enhanced activation energies of the ionic conductivity through the grain boundaries. The change in activation energy implies that the mechanism of ionic conduction through the boundaries can be modified by the Co amount in the lattice. Three conductance mechanisms were identified by the Cole Cole plots in order to understand the relaxation mechanism and activation energies of ionic transportations. Newly formed activation energy, 395 meV, by increasing Co amount up to 10 mol% was attributed to the ionic conductivity through the enhanced (or increased) (Zn,Co)O/ZnO) interface at the grain boundaries. In addition, the activation energy was also enhanced by the electronic stability at high temperatures due to decrease in electronic conductivity in the Co-doped ZnO compared to that in undoped ZnO. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：252 / 258

页数：7

共 31 条

[1] Oxygen-vacancy-related low-frequency dielectric relaxation and electrical conduction in Bi:SrTiO3 [J].

Ang, C ;

Yu, Z ;

Cross, LE .

PHYSICAL REVIEW B, 2000, 62 (01) :228-236

[2] Investigation on structural, optical and dielectric properties of Co doped ZnO nanoparticles synthesized by gel-combustion route [J].

Ansari, Sajid All ;

Nisar, Ambreen ;

Fatma, Bushara ;

Khan, Wasi ;

Naqvi, A. H. .

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, 2012, 177 (05) :428-435

[3]

Barsoukov E, 2005, IMPEDANCE SPECTROSCOPY: THEORY, EXPERIMENT, AND APPLICATIONS, 2ND EDITION, pXII

[4] Dominancy of antiferromagnetism in Zn1-xCoxO diluted magnetic semiconductors [J].

Can, Musa Mutlu ;

Firat, Tezer ;

Ozcan, Sadan .

JOURNAL OF MATERIALS SCIENCE, 2011, 46 (06) :1830-1838

[5] Effect of low Cobalt doping on morphology and properties of calcium ferrite and its application as cathode in Solid Oxide Fuel [J].

Dhankhar, Suchita ;

Tiwari, Pankaj ;

Baskar, K. ;

Basu, Suddhasatwa ;

Singh, Shubra .

CURRENT APPLIED PHYSICS, 2017, 17 (04) :467-473

[6] High performance transition metal oxide composite cathode for low temperature solid oxide fuel cells [J].

Fan, Liangdong ;

Zhu, Bin ;

Chen, Mingming ;

Wang, Chengyang ;

Raza, Rizwan ;

Qin, Haiying ;

Wang, Xuetao ;

Wang, Xiaodi ;

Ma, Ying .

JOURNAL OF POWER SOURCES, 2012, 203 :65-71

[7] Bulk-grain resistivity and positive temperature coefficient of ZnO-based varistors [J].

Fernández-Hevia, D ;

de Frutos, J ;

Caballero, AC ;

Fernández, JF .

APPLIED PHYSICS LETTERS, 2003, 82 (02) :212-214

[8]

Hashiguchi Minako, 2015, Defect and Diffusion Forum, V363, P85, DOI 10.4028/www.scientific.net/DDF.363.85

[9] Structural and frequency dependent dielectric properties of Fe3+ doped ZnO nanoparticles [J].

Hassan, M. Mehedi ;

Ahmed, Arham S. ;

Chaman, M. ;

Khan, Wasi ;

Naqvi, A. H. ;

Azam, Ameer .

MATERIALS RESEARCH BULLETIN, 2012, 47 (12) :3952-3958

[10] Role of grain boundary and grain defects on ferromagnetism in Co:ZnO films [J].

Hsu, H. S. ;

Huang, J. C. A. ;

Chen, S. F. ;

Liu, C. P. .

APPLIED PHYSICS LETTERS, 2007, 90 (10)

← 1 2 3 4 →