Preparation and characteristics of (NayAg1-y)2V4O11 for lithium secondary battery cathodes

被引：18

作者：

Kawakita, J ^{[1
]}

Makino, K ^{[1
]}

Katayama, Y ^{[1
]}

Miura, T ^{[1
]}

Kishi, T ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Appl Chem, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

来源：

JOURNAL OF POWER SOURCES | 1998年 / 75卷 / 02期

关键词：

sliver vanadate; sodium; ion exchange; lithium; discharge capacity;

D O I：

10.1016/S0378-7753(98)00118-9

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：

Layered vanadium oxides; (Na(y)AS(1-y))(2)V4O11 (y = 0.77-0.98) are prepared by substituting part of the silver ions in Ag2V4O11 with sodium ions using an ion-exchange reaction in molten nitrate salts. These oxides exhibit less capacity loss during repeated cycling than non-substituted oxide, Ag2V4O11. This is mainly because the structural change into an amorphous state upon Lithiation is restricted by the pillar effect in which unextractable sodium ions connect adjacent layers during lithium insertion/extraction. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：244 / 250

页数：7

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