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
收藏
页码：241 / 248
页数：8
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