Synthesis and lithium intercalation properties of Na0.5-xLixMnO2+δ and Na0.5-xMnO2+δ cathodes

被引：17

作者：

Jeong, YU ^{[1
]}

Manthiram, A ^{[1
]}

机构：

[1] Univ Texas, Texas Mat Inst, Austin, TX 78712 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 1999年 / 2卷 / 09期

关键词：

D O I：

10.1149/1.1390858

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Na0.5MnO2+delta oxides were synthesized by reducing sodium permanganate with sodium iodide in aqueous solutions followed by firing at 500-800 degrees C. The sample fired at 500 degrees C had a layer structure, whereas those fired at T greater than or equal to 600 degrees C had a tunnel structure. Ion-exchange and sodium-extraction reactions of Na0.5MnO2+delta gave, respectively, Na0.5-xLixMnO2+delta and Na0.5-xMnO2+delta maintaining the layer or tunnel structures. The ion-exchanged samples exhibited better electrochemical properties than the sodium-extracted samples. The layered Na0.06Li0.46MnO2.16 obtained by the ion-exchange reaction exhibited an initial capacity of about 225 mAh/g at 3.8-1.8 V, and the tunnel Na0.16Li0.38MnO2.08 obtained by the ion-exchange reaction exhibited an initial capacity of about 170 mAh/g at 3.8-1.8 V. (C) 1999 The Electrochemical Society. S1099-0062(99)04-055-9. All rights reserved.

引用

页码：421 / 424

页数：4

共 15 条

[1] Li0.44MnO2:: an intercalation electrode with a tunnel structure and excellent cyclability [J].