Improved Rate Capability in a High-Capacity Layered Cathode Material via Thermal Reduction

被引：70

作者：

Abouimrane, Ali ^{[1
]}

Compton, Owen C. ^{[1
,2
]}

Deng, Haixia ^{[1
]}

Belharouak, Ilias ^{[1
]}

Dikin, Dimtriy A. ^{[3
]}

Nguyen, SonBinh T. ^{[1
,2
]}

Amine, Khalil ^{[1
]}

机构：

[1] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[3] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2011年 / 14卷 / 09期

关键词：

LITHIUM-ION BATTERIES; SITU X-RAY; LI2MNO3; ELECTRODES; OXIDE; XPS; NI;

D O I：

10.1149/1.3597655

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Thermal treatment of the high-capacity integrated-structure cathode material Li(2)MnO(3)-LiMO(2) (M = Mn, Ni, and Co) under a reductive H(2) atmosphere was investigated as a means to improve its rate capability when incorporated into a Lithium-ion battery (LIB). The heat-treated electrode, with a composition of Li(1.12)Mn(0.55)Ni(0.145)Co(0.1)O(2), shows a better coulombic charge-discharge efficiency and a good cycleability than the pristine material. This improvement can be attributed to a reduction in the valence of some Mn ions from 4(+) to 3(+), as monitored by X-ray photoelectron spectroscopy. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3597655] All rights reserved.

引用

页码：A126 / A129

页数：4

共 22 条

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