Formation of Li2O in a chemically Li-intercalated V2O5 xerogel

被引：32

作者：

Almeida, EC

Abbate, M ^{[1
]}

Rosolen, JM

机构：

[1] USP, FFCLRP, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil

[2] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, Parana, Brazil

来源：

SOLID STATE IONICS | 2001年 / 140卷 / 3-4期

基金：

巴西圣保罗研究基金会;

关键词：

X-ray absorption; V2O5; xerogel; Li intercalation;

D O I：

10.1016/S0167-2738(01)00844-X

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：

We studied the electronic structure of a chemically Li-intercalated V2O5 xerogel. The technique used in the study was V 2p and O 1s X-ray absorption spectroscopy (XAS). The V ions in the as-prepared V2O5 xerogel are mostly in a pentavalent V5(+) state. The spectra show that the V ions are partially reduced to V4(+) and V3(+) states upon Li intercalation. The results also show that low Li intercalation (x<l) affects mostly O 2p-V 3d mixed states, whereas for higher Li intercalation (x > 1), this mechanism saturates and leads to Li,O formation. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：241 / 248

页数：8

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