Structural investigations of Li1.5+xNa0.5MnO2.85I0.12 electrodes by Mn X-ray absorption near edge spectroscopy

被引：23

作者：

Horne, CR ^{[1
]}

Bergmann, U

Kim, JK

Striebel, KA

Manthiram, A

Cramer, SP

Cairns, EJ

机构：

[1] Ernest Orlando Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Mat Sci & Mineral Engn, Berkeley, CA 94720 USA

[3] Ernest Orlando Lawrence Berkeley Natl Lab, Struct Biol Div, Berkeley, CA USA

[4] Univ Texas, Texas Mat Inst, Austin, TX USA

[5] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA

[6] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2000年 / 147卷 / 02期

关键词：

D O I：

10.1149/1.1393208

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Mn K-edge X-ray absorption near edge spectroscopy (XANES) has been performed on an amorphous, Mn-based oxide, Li1.5Na0.5MnO2.85I0.12, and on electrodes containing this material to determine the changes that occur in the local atomic and electronic structure with state of charge and with cycling. Comparison of the XANES data with those from lambda-MnO2, LiMn2O4, and Li2Mn2O4 reveals that the Mn are octahedrally coordinated and reduced from Mn4+ to Mn3+ during discharge to 2 V. Additional ly, it was found that the amorphous nature of Li1.5Na0.5MnO2.85I0.12 results in less dramatic changes upon inserting Li+, leading to increased cycling stability and the potential for better rate capabilities within the 4-2 V range in comparison to LiMn2O4. (C) 2000 The Electrochemical Society. S0013-4651(99)02-024-8. All rights reserved.

引用

页码：395 / 398

页数：4

共 39 条

[1] Effect of chemical extraction of lithium on the local structure of spinel lithium manganese oxides determined by X-ray absorption spectroscopy [J].

Ammundsen, B ;

Jones, DJ ;

Roziere, J ;

Burns, GR .

CHEMISTRY OF MATERIALS, 1996, 8 (12) :2799-2808

[2] DETERMINATION OF THERMODYNAMIC, KINETIC AND INTERFACIAL PROPERTIES FOR THE LI//LIXMN2O4 SYSTEM BY ELECTROCHEMICAL TECHNIQUES [J].

BARKER, J ;

PYNENBURG, R ;

KOKSBANG, R .

JOURNAL OF POWER SOURCES, 1994, 52 (02) :185-192

[3] X-RAY ABSORPTION NEAR EDGE STRUCTURES (XANES) IN SIMPLE AND COMPLEX MN COMPOUNDS [J].

BELLI, M ;

SCAFATI, A ;

BIANCONI, A ;

MOBILIO, S ;

PALLADINO, L ;

REALE, A ;

BURATTINI, E .

SOLID STATE COMMUNICATIONS, 1980, 35 (04) :355-361

[4]

Bianconi A., 1988, XRAY ABSORPTION PRIN, P573

[5]

BITO Y, 1995, ELECTROCHEMICAL SOC, V9428, P461

[6]

Cairns EJ, 1997, NEW MATERIALS FOR FUEL CELL AND MODERN BATTERY SYSTEMS II, P336

[7]

COTTON FA, 1972, ADV INORG CHEM, P564

[8] STRUCTURE REFINEMENT OF THE SPINEL-RELATED PHASES LI2MN2O4 AND LI0.2MN2O4 [J].

DAVID, WIF ;

THACKERAY, MM ;

DEPICCIOTTO, LA ;

GOODENOUGH, JB .

JOURNAL OF SOLID STATE CHEMISTRY, 1987, 67 (02) :316-323

[9] A POWDER NEUTRON-DIFFRACTION STUDY OF LAMBDA-MANGANESE-DIOXIDE AND GAMMA-MANGANESE-DIOXIDE AND OF LIMN2O4 [J].

FONG, C ;

KENNEDY, BJ ;

ELCOMBE, MM .

ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1994, 209 (12) :941-945

[10] THE QUANTITATIVE JAHN-TELLER DISTORTION OF THE CU2+ SITE IN AQUEOUS-SOLUTION BY XANES SPECTROSCOPY [J].

GARCIA, J ;

BENFATTO, M ;

NATOLI, CR ;

BIANCONI, A ;

FONTAINE, A ;

TOLENTINO, H .

CHEMICAL PHYSICS, 1989, 132 (1-2) :295-307

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