Preferential c-Axis Orientation of Ultrathin SnS2 Nanoplates on Graphene as High-Performance Anode for Li-Ion Batteries

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• 作者：Shuangyu Liu ; Xiang Lu ; Jian Xie ; Gaoshao Cao ; Tiejun Zhu ; Xinbing Zhao
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：March 13, 2013
• 年：2013
• 卷：5
• 期：5
• 页码：1588-1595
• 全文大小：553K
• 年卷期：v.5,no.5(March 13, 2013)
• ISSN：1944-8252

文摘

A SnS₂/graphene (SnS₂/G) hybrid was synthesized by a facile one-step solvothermal route using graphite oxide, sodium sulfide, and SnCl₄路5H₂O as the starting materials. The formation of SnS₂ and the reduction of graphite oxide occur simultaneously. Ultrathin SnS₂ nanoplates with a lateral size of 5鈥?0 nm are anchored on graphene nanosheets with a preferential (001) orientation, forming a unique plate-on-sheet structure. The electrochemical tests showed that the nanohybrid exhibits a remarkably enhanced cycling stability and rate capability compared with bare SnS₂. The excellent electrochemical properties of SnS₂/G could be ascribed to the in situ introduced graphene matrix which offers two-dimensional conductive networks, disperses and immobilizes SnS₂ nanoplates, buffers the volume changes during cycling, and directs the growth of SnS₂ nanoplates with a favorable orientation.

Keywords:

graphene; tin sulfide; plate-on-sheet; c-axis orientation; Li-ion batteries; anode