Fast grain boundary oxygen ion diffusion in the α-phase of Bi2O3

被引：3

作者：

Chater, Richard J. ^{[1
]}

Cavallaro, Andrea ^{[1
]}

Bayliss, Ryan D. ^{[2
]}

Cook, Stuart N. ^{[3
]}

Esser, Bryan D. ^{[4
]}

McComb, David W. ^{[4
]}

Kilner, John A. ^{[1
,5
]}

机构：

[1] Imperial Coll London, Dept Mat, Prince Consort Rd, London SW7 2AZ, England

[2] Univ Illinois, Dept Chem, 845 West Taylor St, Chicago, IL 60607 USA

[3] MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[4] Ctr Electron Microscopy & Anal, Dept Mat Sci & Engn, 1305 Kinnear Rd, Columbus, OH 43212 USA

[5] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

来源：

SOLID STATE IONICS | 2017年 / 299卷

关键词：

Bismuth oxide; alpha-Phase; Fast oxygen migration; Grain boundary; Extended defects; KINETICS;

D O I：

10.1016/j.ssi.2016.08.002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The low temperature stable alpha-phase of pure Bi2O3 is known to have an oxygen ion diffusivity that is over 7 orders of magnitude lower than the high temperature fluorite-structured 8-phase. Tracer oxygen-18 diffusion studies of polycrystalline alpha-Bi2O3 at 600 degrees C using an ion microscope with lateral resolutions of similar to 50 nm for the surface distributions of the oxygen isotopes have resolved the secondary fast migration pathways as well as the normal bulk diffusion profile in the grains. A grain boundary pathway for the oxygen migration is distinguished from other extended defects, some of which are also active in the overall oxygen diffusivity. This experimental study highlights the potential manipulation of the micro-structure of this material for enhanced oxygen ion conduction in intermediate temperature solid oxide fuel cells as has been shown for perovskite MIEC electrode materials. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：89 / 92

页数：4

共 8 条

[1] Oxygen Ion Diffusion and Surface Exchange Properties of the α- and δ-phases of Bi2O3 [J].

Bayliss, Ryan D. ;

Cook, Stuart N. ;

Kotsantonis, Sakis ;

Chater, Richard J. ;

Kilner, John A. .

ADVANCED ENERGY MATERIALS, 2014, 4 (10)

[2]

Crank J., 1975, The Mathematics of Diffusion, V2nd

[3] INFLUENCE OF DISLOCATIONS ON DIFFUSION KINETICS IN SOLIDS WITH PARTICULAR REFERENCE TO ALKALI HALIDES [J].

HARRISON, LG .

TRANSACTIONS OF THE FARADAY SOCIETY, 1961, 57 (08) :1191-&

[4] Microstructure degradation of an anode/electrolyte interface in SOFC studied by transmission electron microscopy [J].

Liu, YL ;

Jiao, CG .

SOLID STATE IONICS, 2005, 176 (5-6) :435-442

[5] The kinetics of oxygen transport in 9.5 mol % single crystal yttria stabilised zirconia [J].

Manning, PS ;

Sirman, JD ;

DeSouza, RA ;

Kilner, JA .

SOLID STATE IONICS, 1997, 100 (1-2) :1-10

[6] Fast oxygen exchange and diffusion kinetics of grain boundaries in Sr-doped LaMnO3 thin films [J].

Navickas, Edvinas ;

Huber, Tobias M. ;

Chen, Yan ;

Hetaba, Walid ;

Holzlechner, Gerald ;

Rupp, Ghislain ;

Stoeger-Pollach, Michael ;

Friedbacher, Gernot ;

Hutter, Herbert ;

Yildiz, Bilge ;

Fleig, Juergen .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2015, 17 (12) :7659-7669

[7] Oxygen ion diffusivity, surface exchange and ionic conductivity in single crystal Gadolinia doped Ceria [J].

Ruiz-Trejo, E ;

Sirman, JD ;

Baikov, YM ;

Kilner, JA .

SOLID STATE IONICS, 1998, 113 :565-569

[8] Engineering Mixed Ionic Electronic Conduction in La0.8Sr0.2MnO3+ Nanostructures through Fast Grain Boundary Oxygen Diffusivity [J].

Saranya, Aruppukottai M. ;

Pla, Dolors ;

Morata, Alex ;

Cavallaro, Andrea ;

Canales-Vazquez, Jesus ;

Kilner, John A. ;

Burriel, Monica ;

Tarancon, Albert .

ADVANCED ENERGY MATERIALS, 2015, 5 (11)

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