Surface-modified Si nanoparticles produced from 3- aminotriethoxysilane as an anode material for a high performance lithium-ion battery

LI Xiao; SONG Yan; TIAN Xiao-dong; WANG Kai; GUO Quan-gui; LIU Lang

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Article Navigation > New Carbon Mater. > 2015 > 30(6): 587-593

LI Xiao, SONG Yan, TIAN Xiao-dong, WANG Kai, GUO Quan-gui, LIU Lang. Surface-modified Si nanoparticles produced from 3- aminotriethoxysilane as an anode material for a high performance lithium-ion battery. New Carbon Mater., 2015, 30(6): 587-593.

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Surface-modified Si nanoparticles produced from 3- aminotriethoxysilane as an anode material for a high performance lithium-ion battery

1.
University of Chinese Academy of Sciences, Beijing 100049, China;
2.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Funds: Natural Science Foundation of Shanxi Province (2012011219-3); Outstanding Young Talent Fund of Institute of Coal chemistry, Chinese Academy of Sciences.

Received Date: 2015-10-20
Accepted Date: 2016-01-05
Rev Recd Date: 2015-12-08
Publish Date: 2015-12-28

Abstract

Abstract

3-aminotriethoxysilane (3-APTS) was used to modify Si nanoparticles to improve the utilization rate of Si as an anode in a lithium ion battery. The structure, morphology and Si content were characterized by SEM, TEM, TGA, XRD, FT-IR, Raman spectroscopy. It is found that the 3-APTS-modified Si has a yolk-shell structure. 3-APTS plays an important role in the dispersion of Si nanoparticles and no obvious Si agglomeration is observed after the modification. The modified Si has an excellent electrochemical performance. The reversible capacity is 913 mAh·g^-1 after 50 cycles at a current density of 100 mAh·g^-1, the first coulombic efficiency is 62.9% and the retention capacity is 99.6% after 35 cycles. These values are better than for the unmodified Si whose initial reversible capacity is 652.9 mAh·g^-1 and 541 mAh·g^-1 after 50 cycles. Moreover, the reversible capacity of the modified Si has a capacity of 480 mAh·g^-1 at a high current density of 1 500 mAh·g^-1, indicating an excellent rate capability.
- Lithium-ion batteries,
- Si nanoparticle,
- 3-APTS-Si@C/G composite,
- Cycle performance

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