Surface modification of spinel Li4Ti5O12 with Fe for lithium ion batteries

被引：6

作者：

Wang, B. F. ^{[1
]}

Cao, J. ^{[1
]}

Liu, Y. ^{[1
]}

机构：

[1] Shanghai Univ Elect Power, Shanghai 200090, Peoples R China

来源：

MATERIALS TECHNOLOGY | 2014年 / 29卷 / 02期

关键词：

Surface modification; Spinel Li4Ti5O12; Lithium ion batteries; ANODE MATERIAL; ELECTROCHEMICAL PERFORMANCE; HYDROTHERMAL SYNTHESIS; RATE CAPABILITY; COMPOSITE; ELECTRODE; STORAGE;

D O I：

10.1179/1753555713Y.0000000106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Special capacity and cycling performance of spinel Li4Ti5O12 anode material were improved by surface modification with Fe through a facile method. The phase structures, morphologies and electrochemical performance of pristine and Fe modified Li4Ti5O12 were investigated by Xray diffraction, scanning electron microscopy, Energy dispersive X-ray spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy and charge-discharge tests. Electrochemical measurements demonstrated that the Li4Ti5O12/Fe electrode displayed enhanced special capacity and cycling performance compared with those of pristine Li4Ti5O12. The special capacity of Li4Ti5O12/Fe is 123.4 mAh g(-1) at 5C rate, much higher than 59.5 mAh g 21 of the pristine material. The Fe modified Li4Ti5O12 anode also showed superior cycling stability with an initial discharge capacity of 141 mAh g(-1) at 2C rate and still maintained 96.7% of its initial capacity after 300 cycles.

引用

页码：124 / 128

页数：5

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