Improved rate capability of Si-C composite anodes by boron doping for lithium-ion batteries

被引：75
|
作者：
Yi, Ran [1 ]
Zai, Jiantao [1 ]
Dai, Fang [1 ]
Gordin, Mikhail L. [1 ]
Wang, Donghai [1 ]
机构：
[1] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2013年 / 36卷
关键词：
Boron doping; Si-C composite; Rate capability; Anode; Lithium-ion battery; SILICON; CONDUCTIVITY; PERFORMANCE;
D O I：
10.1016/j.elecom.2013.09.004
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We report a novel strategy to enhance the rate capability of Si-c composite by facile boron doping. Boron doping was confirmed by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The boron-doped Si-C composite shows much improved rate capability, delivering a capacity of 575 mAh/g at 6.4 A/g without any external carbon additive, 80% higher than that of undoped composite. Electrochemical impedance spectroscopy (EIS) measurement shows that boron-doped Si-C composite has lower charge transfer resistance, which helps improve its rate capability. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：29 / 32
页数：4
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