期刊
IONICS
卷 19, 期 11, 页码 1545-1549出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-013-0886-1
关键词
Lithium-ion batteries; Silicon; Carbon; Nanocomposite; Anode materials
资金
- 973 project [2013CB934001]
- NSF of China [51172024]
- Fundamental Research Funds for the Central Universities of China [FRF-TP-09-007A]
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.
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