A new hydrated sodium vanadium bronze as Li insertion compound

被引:24
作者
Millet, M
Farcy, J
Pereira-Ramos, JP
Sabbar, EM
De Roy, ME
Besse, JP
机构
[1] LECSO, CNRS, UM 28, F-94320 Thiais, France
[2] Univ Blaise Pascal, LMI, CNRS, ESA 6002, F-63177 Aubiere, France
关键词
Li insertion compound; chronopotentiometric; cyclic voltammetric;
D O I
10.1016/S0167-2738(98)00202-1
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
A sodium vanadium bronze hydrate, Na0.33V2O5 . 1.3H(2)O has been synthesized from reaction of phosphonic acid with vanadyl ions and sodium hydroxide in aqueous solution. The electrochemical Li insertion has been investigated in this layered structure characterized by a basal spacing of 10.84 Angstrom. Its behaviour differs from that known for the sol-g-el sodium-exchanged V2O5 xerogel and for the anhydrous monoclinic bronze. The presence of water does not hinder Li accommodation and two main reversible insertion steps are found at 3.1 V and 2.65 V for a maximum Li uptake of 1.65 lithium ion per mole of compound. Preliminary chronopotentiometric and cyclic voltammetric experiments indicate the potential interest of such a hydrated vanadium pentoxide bronze for reversible Li insertion reactions. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:319 / 327
页数:9
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