Reversible lithium storage in LiF/Ti nanocomposites

被引：76

作者：

Yu, X. Q. ^{[1
]}

Sun, J. P. ^{[1
]}

Tang, K. ^{[1
]}

Li, H. ^{[1
]}

Huang, X. J. ^{[1
]}

Dupont, L. ^{[2
]}

Maier, J. ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] UPJV, LRCS, Ctr Natl Rech Sci 8007, F-80089 Amiens, France

[3] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 41期

关键词：

METAL FLUORIDE NANOCOMPOSITES; ELECTRODE MATERIALS; LI-STORAGE; ELECTROCHEMISTRY; CONDUCTION; TRANSPORT; MECHANISM;

D O I：

10.1039/b908149f

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：

Storage and transport behaviors of lithium in LiF/Ti nanocomposites, either formed in situ through a conversion reaction from TiF3 powder electrode or prepared by the pulse laser deposition method, have been investigated. Reversible lithium storage in the LiF/Ti nanocomposites shows a sloped voltage profile. The lithium storage capacity in the LiF/Ti nanocomposite thin film is much higher than that in single Ti or LiF thin film with the same thickness and is increased with increasing film thickness. Accordingly, lithium should store at the grain boundary regions since either the LiF or the Ti phase is not active for lithium storage. Hence, this type of interfacial storage is intermediate between the insertion and storage in supercapacitors. The transport properties of electrons and lithium ions in initial LiF/Ti nanocomposites are also investigated by IV, IS and blocking electrode techniques.

引用

页码：9497 / 9503

页数：7

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