Si/graphene composite prepared by magnesium thermal reduction of SiO2 as anode material for lithium-ion batteries
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- 作者：Yuanjin Du ; Guannan Zhu ; Ke Wang ; Yonggang Wang ; Congxiao Wang ; Yongyao Xia
- 关键词：Silicon ; Graphene ; Anode materials ; Lithium-ion batteries
- 刊名：Electrochemistry Communications
- 出版年：November, 2013
- 年：2013
- 卷：36
- 期：Complete
- 页码：107-110
- 全文大小：766 K
文摘
A nanosized Si/graphene composite was prepared by magnesium thermal reduction of the in-situ generated SiO2 particles on graphene sheets, in which about 5 nm-silicon nanoparticles were homogeneously loaded on graphene sheets. The unique structure can not only accommodate the large volume changes, but also maintain electronic conductivity during Li-ion insertion/extraction. The composite delivers an initial reversible capacity of 1750 mAh/g at a current rate of 100 mA/g and exhibits an excellent cycling stability with a capacity of 1374 mAh/g over 120 cycles.