Synchronously synthesized Si@C composites through solvothermal oxidation of Mg2Si as lithium ion battery anode

Zhiguo Hou; Xueqian Zhang; Jianwen Liang; Xiaona Lia; Xuedong Yan; Yongchun Zhu; Yitai Qian

doi:10.1039/C5RA13155C

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Synchronously synthesized Si@C composites through solvothermal oxidation of Mg₂Si as lithium ion battery anode†

Zhiguo Hou,^a Xueqian Zhang,^a Jianwen Liang,^a Xiaona Lia,^a Xuedong Yan,^b Yongchun Zhu*^a and Yitai Qian*^a

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* Corresponding authors

^a Hefei National Laboratory for Physical Science at Micro-scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
E-mail: ychzhu@ustc.edu.cn, ytqian@ustc.edu.cn

^b Ningbo Veken Battery Company Inc., West Bonded Zone, Ningbo, Zhejiang 315000, P. R. China

Abstract

Si@C composites have been solvothermally synthesized by the reaction of ethanol or acetone with Mg₂Si at 650 °C, followed by HCl washing. Ethanol or acetone can oxidise Mg₂Si to form Si, and at the same time, they are reduced to synchronously form carbon coated on the surface of the generated Si nanoparticles. As lithium ion battery anode, the as-synthesized Si@C composites obtained from the reaction of acetone with Mg₂Si deliver a reversible capacity of 3277 mA h g⁻¹ at 0.36 A g⁻¹ and remain 892 mA h g⁻¹ at 3.6 A g⁻¹ after 350 cycles.

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Article information

DOI: https://doi.org/10.1039/C5RA13155C
Article type: Communication
Submitted: 06 Jul 2015
Accepted: 17 Aug 2015
First published: 17 Aug 2015

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RSC Adv., 2015,5, 71355-71359

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Synchronously synthesized Si@C composites through solvothermal oxidation of Mg₂Si as lithium ion battery anode

Z. Hou, X. Zhang, J. Liang, X. Lia, X. Yan, Y. Zhu and Y. Qian, RSC Adv., 2015, 5, 71355 DOI: 10.1039/C5RA13155C

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