Preparation and effects of W-doping on electrochemical properties of spinel Li4Ti5O12 as anode material for lithium ion battery

被引：8
作者：
Zhang Xin-long [1 ]
Hu Guo-rong [1 ]
Peng Zhong-dong [1 ]
机构：
[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2013年 / 20卷 / 05期
关键词：
lithium-ion battery; lithium titanate; anode material; doping; ELECTRODE MATERIAL; PERFORMANCE; DOPANT;
D O I：
10.1007/s11771-013-1597-5
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
W-doped Li4Ti5O12 in the form of Li4Ti4.95W0.05O12 was firstly synthesized via solid state reaction. X-ray diffraction (XRD) and scanning electron microscope (SEM) were employed to characterize the structure and morphology of Li4Ti4.95W0.05O12. W-doping does not change the phase composition and particle morphology, while remarkably improves its cycling stability at high charge/discharge rate. Li4Ti4.95W0.05O12 exhibits an excellent rate capability with a reversible capacity of 131.2 mA center dot h/g at 10C and even 118.6 mA center dot h/g at 20C. The substitution of W for Ti site can enhance the electronic conductivity of Li4Ti5O12 via the generation of mixing Ti4+/Ti3+, which indicates that Li4Ti4.95W0.05O12 is promising as a high rate anode for the lithium-ion batteries.
引用
收藏
页码：1151 / 1155
页数：5
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