Binary Li4Ti5O12-Li2Ti3O7 Nanocomposite as an Anode Material for Li-Ion Batteries

被引：84

作者：

Zhu, Guan-Nan ^{[1
,2
]}

Chen, Long ^{[1
,2
]}

Wang, Yong-Gang ^{[1
,2
]}

Wang, Con-Xiao ^{[1
,2
]}

Che, Ren-Chao ^{[3
,4
]}

Xia, Yong-Yao ^{[1
,2
]}

机构：

[1] Fudan Univ, Dept Chem, Shanghai 200438, Peoples R China

[2] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Inst New Energy, Shanghai 200438, Peoples R China

[3] Fudan Univ, Dept Mat Sci, Shanghai 200438, Peoples R China

[4] Fudan Univ, Adv Mat Lab, Shanghai 200438, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2013年 / 23卷 / 05期

基金：

中国国家自然科学基金;

关键词：

lithium titanates; anode materials; lithium-ion batteries; state of charge estimation; RATE-CAPABILITY; RECHARGEABLE BATTERIES; NEGATIVE ELECTRODE; MISCIBILITY GAP; ENERGY-STORAGE; LITHIUM; PERFORMANCE; LIFEPO4; SYSTEM;

D O I：

10.1002/adfm.201201741

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Li4Ti5O12 typically shows a flat charge/discharge curve, which usually leads to difficulty in the voltage-based state of charge (SOC) estimation. In this study, a facile quench-assisted solid-state method is used to prepare a highly crystalline binary Li4Ti5O12-Li2Ti3O7 nanocomposite. While Li4Ti5O12 exhibits a sudden voltage rise/drop near the end of its charge/discharge curve, this binary nanocomposite has a tunable sloped voltage profile. The nanocomposite exhibits a unique lamellar morphology consisting of interconnected nanograins of approximate to 20 nm size with a hierarchical nanoporous structure, contributing to an enhanced rate capability with a capacity of 128 mA h g1 at a high C-rate of 10 C, and excellent cycling stability.

引用

页码：640 / 647

页数：8

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