Silicon/carbon nanocomposites used as anode materials for lithium-ion batteries

被引:20
|
作者
Yong, Yingqiong [1 ]
Fan, Li-Zhen [1 ]
机构
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
关键词
Lithium-ion batteries; Silicon; Carbon; Nanocomposite; Anode materials; MESOPHASE PITCH; SI NANOPARTICLES; PERFORMANCE;
D O I
10.1007/s11581-013-0886-1
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
Silicon/carbon nanocomposites are prepared by dispersing nano-sized silicon in mesophase pitch and a subsequent pyrolysis process. In the nanocomposites, silicon nanoparticles are homogeneously distributed in the carbon networks derived from the mesophase pitch. The silicon/carbon nanocomposite delivers a high reversible capacity of 841 mAh g(-1) at the current density of 100 mA g(-1) at the first cycle, high capacity retention of 98 % over 30 cycles, and good rate performance. The superior electrochemical performance of nanocomposite is attributed to the carbon networks with turbostratic structure, which enhance the conductivity and alleviate the volume change of silicon.
引用
收藏
页码:1545 / 1549
页数:5
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