ELECTROCHEMICAL PROPERTIES OF AMORPHOUS V2O5

被引：44

作者：

NABAVI, M ^{[1
]}

SANCHEZ, C ^{[1
]}

TAULELLE, F ^{[1
]}

LIVAGE, J ^{[1
]}

DEGUIBERT, A ^{[1
]}

机构：

[1] LABS MARCOUSSIS,F-91460 MARCOUSSIS,FRANCE

来源：

SOLID STATE IONICS | 1988年 / 28卷

关键词：

Cathodes--Materials - Chemical Operations--Doping - Electric Batteries; Secondary--Electrodes - Lithium Compounds--Synthesis - Oxides--Amorphous;

D O I：

10.1016/0167-2738(88)90353-0

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：

Pure amorphous vanadium pentoxide can be obtained by splat-cooling from the melt. The characterization of this amorphous oxide was carried out by X-ray diffraction, DTA, ESR, magnetic susceptibility, 51V NMR and electrical resistivity. This nonstoichiometric oxide exhibits electronic conductivity arising from a small-polaron hopping process between V4+ and V5+ ions. The amorphous oxide is able to give LixV2O5 phases via chemical or electrochemical insertion of Li+ ions into the oxide network. Electrochemical experiments performed with LiAsF6 in cyclic ether as an electrolyte show that 1.8 Li+ per V2O5 can be reversibly inserted between 3.5 v and 2 v (versus Li+/Li). Contrary to crystalline V2O5, the open-circuit voltage continuously decreases with the amount of inserted Li+, suggesting that no phase transition occurs in amorphous LixV2O5 up to x=1.8.

引用

页码：1183 / 1186

页数：4

共 17 条

[1] ETHYLENE CARBONATE 2-METHYLTETRAHYDROFURAN ELECTROLYTE FOR LI/AMORPHOUS V2O5-P2O SECONDARY BATTERIES [J].