Nanostructured lithium manganese oxide cathodes obtained by reducing lithium permanganate with methanol

被引：32

作者：

Im, D ^{[1
]}

Manthiram, A ^{[1
]}

机构：

[1] Univ Texas, Mat Sci & Engn Program, Austin, TX 78712 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2002年 / 149卷 / 08期

关键词：

D O I：

10.1149/1.1490355

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Reduction of lithium permanganate with methanol in acetonitrile and acetonitrile-water media has been investigated to obtain nanocrystalline lithium manganese oxides. The products have been characterized by wet-chemical analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, and transmission electron microscopy. The samples synthesized in acetonitrile medium consist of a considerable amount of organic residue even after firing at 250degreesC in vacuum, which could be lowered by introducing water into the synthesis and washing media (acetonitrile-water mixture). Additionally, introduction of lithium hydroxide into the synthesis medium helps to increase the lithium content and Li/Mn ratio in the product and thereby to improve the electrochemical performance. Optimum compositions synthesized in the acetonitrile-water medium exhibit capacities of >200 mAh/g with good cyclability and charge efficiency. (C) 2002 The Electrochemical Society.

引用

页码：A1001 / A1007

页数：7

共 26 条

[1] Synthesis of layered LiMnO2 as an electrode for rechargeable lithium batteries [J].

Armstrong, AR ;

Bruce, PG .

NATURE, 1996, 381 (6582) :499-500

[2] SOL-GEL SYNTHESIS OF MANGANESE OXIDES [J].

BACH, S ;

HENRY, M ;

BAFFIER, N ;

LIVAGE, J .

JOURNAL OF SOLID STATE CHEMISTRY, 1990, 88 (02) :325-333

[3] THE USE OF ACETATES AS PRECURSORS FOR THE LOW-TEMPERATURE SYNTHESIS OF LIMN2O4 AND LICOO2 INTERCALATION COMPOUNDS [J].

BARBOUX, P ;

TARASCON, JM ;

SHOKOOHI, FK .

JOURNAL OF SOLID STATE CHEMISTRY, 1991, 94 (01) :185-196

[4] A review of porous manganese oxide materials [J].

Brock, SL ;

Duan, NG ;

Tian, ZR ;

Giraldo, O ;

Zhou, H ;

Suib, SL .

CHEMISTRY OF MATERIALS, 1998, 10 (10) :2619-2628

[5] A new variety of LiMnO2 with a layered structure [J].

Capitaine, F ;

Gravereau, P ;

Delmas, C .

SOLID STATE IONICS, 1996, 89 (3-4) :197-202

[6] SOL-GEL SYNTHESIS OF BIRNESSITE FROM KMNO4 AND SIMPLE SUGARS [J].

CHING, S ;

LANDRIGAN, JA ;

JORGENSEN, ML ;

DUAN, NG ;

SUIB, SL ;

OYOUNG, CL .

CHEMISTRY OF MATERIALS, 1995, 7 (09) :1604-1606

[7] Sol-gel synthesis of layered birnessite-type manganese oxides [J].

Ching, S ;

Petrovay, DJ ;

Jorgensen, ML ;

Suib, SL .

INORGANIC CHEMISTRY, 1997, 36 (05) :883-890

[8] Sol-gel route to the tunneled manganese oxide cryptomelane [J].

Ching, S ;

Roark, JL ;

Duan, N ;

Suib, SL .

CHEMISTRY OF MATERIALS, 1997, 9 (03) :750-754

[9] SPECTRA-STRUCTURE CORRELATIONS IN THE INFRA-RED REGION [J].

COLTHUP, NB .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1950, 40 (06) :397-400

[10]

FESSENDEN RJ, 1990, ORGANIC CHEM, P285

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