An X-Ray Absorption Spectroscopy Study of Ball-Milled Lithium Tantalate and Lithium Titanate Nanocrystals

被引：4

作者：

Chadwick, A. V. ^{[1
]}

Pickup, D. M. ^{[1
]}

Ramos, S. ^{[1
]}

Cibin, G. ^{[2
]}

Tapia-Ruiz, N. ^{[3
]}

Breuer, S. ^{[4
]}

Wohlmuth, D. ^{[4
]}

Wilkening, M. ^{[4
]}

机构：

[1] Univ Kent, Sch Phys Sci, Canterbury CT2 7NH, Kent, England

[2] Diamond Light Source, Diamond House,Harwell Campus, Didcot OX11 0DE, Oxon, England

[3] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[4] Graz Univ Technol, Inst Chem & Technol Mat, Christian Doppler Lab Lithium Batteries, Stremayrgasse 9, A-8010 Graz, Austria

来源：

2016 INTERNATIONAL CONFERENCE ON DEFECTS IN INSULATING MATERIALS (ICDIM 2016) | 2017年 / 169卷

关键词：

IONIC-CONDUCTION; DYNAMICS;

D O I：

10.1088/1757-899X/169/1/012015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Previous work has shown that nanocrystalline samples of lithium tantalate and titanate prepared by high-energy milling show unusually high lithium ion conductivity. Here, we report an X-ray absorption spectroscopy (XAS) study at the Ti K-edge and the Ta L-3 edge of samples that have been milled for various lengths of time. For both systems the results show that milling creates amorphous material whose quantity increases with the milling time. The more extensive data for the tantalate shows that milling for only 30 minutes generates similar to 25% amorphous content in the sample. The content rises to similar to 60% after 16 hours. It is suggested that it is the motion of the lithium ions through the amorphous content that provides the mechanism for the high ionic conductivity.

引用

页数：6

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