Electrochemical Li+ insertion in WO3-xTiO2 mixed oxides

被引：24

作者：

Yebka, B

Pecquenard, B

Julien, C

Livage, J

机构：

[1] Univ Paris 06, Lab Milieux Desordonnes & Heterogenes, F-75252 Paris, France

[2] Univ Paris 06, Lab Chim Mat Condensee, F-75252 Paris, France

来源：

SOLID STATE IONICS | 1997年 / 104卷 / 3-4期

关键词：

tungsten oxides; lithium insertion; peroxopolytungstic acid;

D O I：

10.1016/S0167-2738(97)00439-6

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：

Mixed WO3-TiO2 oxides have been prepared from aqueous solutions of tungstic acid and titanium isopropoxide in H2O2. Peroxopolytungstic acids 'WO3 . H2O2 . H2O' are obtained from pure tungstic acid whereas WO3 . 1/3H(2)O is formed in the presence of Ti-IV. Three crystalline oxides are formed successively upon heating Ti doped WO3 . 1/3H(2)O, namely h-WO3, o-WO3 and m-WO3. The intermediate metastable o-WO3 phase has not been observed in the absence of titanium. The cathodic behavior of these oxides shows that the discharge curves corresponding to the electrochemical insertion of Li+ are noticeably different. This has to be related to the structural differences between these phases.

引用

页码：169 / 175

页数：7

共 24 条

[1] Degradation mechanisms in electrochromic devices based on sol-gel deposited thin films [J].