57Fe Mossbauer spectroscopy and surface modification with zinc and magnesium of LiCo0.8Fe0.2MnO45Velectrodes

被引：6

作者：

Alcántara, R

Jaraba, M

Lavela, P

Tirado, JL

Jumas, JC

Fourcade, JO

机构：

[1] Univ Cordoba, Lab Quim Inorgan, E-14071 Cordoba, Spain

[2] Univ Montpellier 2, Lab Agregats Mol & Mat Inorgan, UMR 5072, F-34095 Montpellier 5, France

来源：

JOURNAL OF POWER SOURCES | 2004年 / 135卷 / 1-2期

关键词：

Fe-57 Mossbauer spectroscopy; lithium batteries; X-ray diffraction;

D O I：

10.1016/j.jpowsour.2004.03.046

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 high-voltage (5 V) LiCo0.8Fe0.2MnO4 electrode with spinel-type structure has been prepared. Fe-57 Mossbauer spectra reveal high-spin Fe3+ ions in octahedral coordination in the pristine sample, which are oxidized to tetravalent iron ions. Surface treatments with zinc and magnesium have been applied. Zinc and magnesium were homogenously distributed, according to EPMA and mapping analysis, while the spinet structure is maintained. The magnesium and the zinc treatments drive to better electrochemical performance and capacity retention. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：281 / 285

页数：5

共 27 条

[1] X-ray diffraction and electrochemical impedance spectroscopy study of zinc coated LiNi0.5Mn1.5O4 electrodes
Alcántara, R
Jaraba, M
Lavela, P
Tirado, JL
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2004, 566 (01) : 187 - 192
[2] New LiNiyCo1-2yMn1+yO4 spinel oxide solid solutions as 5 V electrode material for Li-ion batteries
Alcántara, R
Jaraba, M
Lavela, P
Tirado, JL
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (01) : A53 - A58
[3] Electrochemical, 6Li MAS NMR, and X-ray and neutron diffraction study of LiCoxFeyMn2-(x+y)O4 spinel oxides for high-voltage cathode materials
Alcántara, R
Jaraba, M
Lavela, P
Tirado, JL
[J]. CHEMISTRY OF MATERIALS, 2003, 15 (05) : 1210 - 1216
[4] Changes in oxidation state and magnetic order of iron atoms during the electrochemical reaction of lithium with NiFe2O4
Alcántara, R
Jaraba, M
Lavela, P
Tirado, JL
Jumas, JC
Olivier-Fourcade, J
[J]. ELECTROCHEMISTRY COMMUNICATIONS, 2003, 5 (01) : 16 - 21
[5] Optimizing preparation conditions for 5 V electrode performance, and structural changes in Li1-xNi0.5Mn1.5O4 spinel
Alcántara, R
Jaraba, M
Lavela, P
Tirado, JL
[J]. ELECTROCHIMICA ACTA, 2002, 47 (11) : 1829 - 1835
[6] Olivine LiCoPO4 as 4.8 V electrode material for lithium batteries
Amine, K
Yasuda, H
Yamachi, M
[J]. ELECTROCHEMICAL AND SOLID STATE LETTERS, 2000, 3 (04) : 178 - 179
[7] Synthesis and characterization of Li2MxMn4-xO8 (M = Co, Fe) as positive active materials for lithium-ion cells
Bonino, F
Panero, S
Satolli, D
Scrosati, B
[J]. JOURNAL OF POWER SOURCES, 2001, 97-8 : 389 - 392
[8] Chen LC, 2002, J NEW MAT ELECTR SYS, V5, P213
[9] Cho J, 2001, ANGEW CHEM INT EDIT, V40, P3367, DOI 10.1002/1521-3773(20010917)40:18<3367::AID-ANIE3367>3.0.CO
[10] 2-A

← 1 2 3 →