Citation: TANG Yan-Ping, YUAN Sha, GUO Yu-Zhong, HUANG Rui-An, WANG Jian-Hua, YANG Bin, DAI Yong-Nian. Magnesiothermic Reduction Preparation and Electrochemical Properties of a Highly Ordered Mesoporous Si/C Anode Material for Lithium-Ion Batteries[J]. Acta Physico-Chimica Sinica, ;2016, 32(9): 2280-2286. doi: 10.3866/PKU.WHXB201605124 shu

Magnesiothermic Reduction Preparation and Electrochemical Properties of a Highly Ordered Mesoporous Si/C Anode Material for Lithium-Ion Batteries

1.
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China;
2.
National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, P. R. China

Received Date: 14 March 2016
Revised Date: 11 May 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (51464025).

A highly ordered mesoporous Si/C composite was prepared by magnesiothermic reduction method, using SBA-15 as the precursor at 660 ℃ with subsequent carbon coating. This Si/C composite preserved the ordered honeycomb pore channels of SBA-15 and exhibited a lotus root-like structure with high packing density. A liquid ambient reaction model is proposed to explain the reaction between SBA-15 and magnesium powder at 660 ℃ as well as the mechanism by which the highly ordered mesoporous structure is generated. The phase composition and morphology of this material were analyzed by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption- desorption and Raman spectroscopy. The excellent electrochemical performance of the as- prepared material suggests potential applications as an anode material in second-generation Li-ion batteries.
- Li-ion battery,
- Mesoporous silicon,
- Anode material,
- Nanocomposite,
- Magnesiothermic reduction method
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沈阳化工大学材料科学与工程学院沈阳 110142