Improved rate capability of carbon coated Li3.9Sn0.1Ti5O12 porous electrodes for Li-ion batteries

被引：88

作者：

Zhang, Biao ^{[1
]}

Huang, Zhen-Dong ^{[1
]}

Oh, Sei Woon ^{[1
]}

Kim, Jang-Kyo ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Mech Engn, Clear Water Bay, Hong Kong, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 24期

关键词：

Lithium titanate; Doping; Anode; Li-ion batteries; ELECTROCHEMICAL PERFORMANCE; ANODE MATERIAL; LITHIUM; LI4TI5O12; SPINEL; INSERTION; CAPACITY; OXIDES;

D O I：

10.1016/j.jpowsour.2011.08.114

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 new sol-gel process is developed to modify the Li4Ti5O12 anode material for improved rate capability. The new process brings about the following effects, namely (i) doping of Sn2+ to form Li3.9Sn0.1Ti5O12, (ii) carbon coating and (iii) creation of a porous structure. The doping of Sn2+ results in the lattice distortion without changing the phase composition. A thin layer of amorphous carbon is coated on the doped particles that contain numerous nanopores. The rate capability of the anode material made from the modified powder is significantly improved when discharged at high current rates due to the reduced charge transfer resistance. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：10692 / 10697

页数：6

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