Enhancement of the Grain Boundary Conductivity in Ceramic Li0.34La0.55TiO3 Electrolytes in a Moisture-Free Processing Environment

被引：37

作者：

Aguesse, Frederic ^{[1
]}

Lopez del Amo, Juan Miguel ^{[1
]}

Roddatis, Vladimir ^{[1
]}

Aguadero, Ainara ^{[2
]}

Kilner, John A. ^{[2
]}

机构：

[1] CIC EnergiGUNE, Minano 01510, Spain

[2] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England

来源：

ADVANCED MATERIALS INTERFACES | 2014年 / 1卷 / 07期

关键词：

LITHIUM ION CONDUCTIVITY; SOLID-SOLUTION LA0.67-XLI3XTIO3; A-SITE IONS; LANTHANUM TITANATE; PEROVSKITE; NMR; EXCHANGE; SPECTROSCOPY;

D O I：

10.1002/admi.201300143

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The grain boundary resistivity problem of highly conductive bulk Li0.34La0.55TiO3 perovskite has been investigated by means of impedance spectroscopy and solid-state NMR of samples processed in controlled atmospheres. The samples were sintered in air, synthetic air, and oxygen, in which the level of moisture varied. A dry atmosphere is critical to obtain dense ceramics with a low grain boundary resistivity. The grain boundary conductivity is five times higher for samples sintered in oxygen atmosphere due to the suppression of Li2CO3 secondary phase formation, which is responsible for low lithium ion diffusion at the grain boundary.

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页数：9

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