| MA Lin,YE Jian-bo,HUANG Guo-chuang,WANG Zhen,ZHOU Xin-fa,WU Min,CHEN Wei-xiang.Synthesis and Electrochemical Li-storage Performance of SnS2-SnO2 / Graphene Composites[J],44(1):8-14 |
| Synthesis and Electrochemical Li-storage Performance of SnS2-SnO2 / Graphene Composites |
| Received:December 15, 2014 Revised:January 20, 2015 |
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| DOI： |
| KeyWord:tin disulfide tin oxide graphene nanocomposites Li-ion battery |
| Author | Institution |
| MA Lin |
1. Lingnan Normal University, Zhanjiang , China; 2. Department of Chemistry, Zhejiang University,Hangzhou , China; |
| YE Jian-bo |
Department of Chemistry, Zhejiang University,Hangzhou , China; |
| HUANG Guo-chuang |
Department of Chemistry, Zhejiang University,Hangzhou , China; |
| WANG Zhen |
Department of Chemistry, Zhejiang University,Hangzhou , China; |
| ZHOU Xin-fa |
Zhejiang Institute of Energy, Hangzhou , China |
| WU Min |
Zhejiang Institute of Energy, Hangzhou , China |
| CHEN Wei-xiang |
Zhejiang Institute of Energy, Hangzhou , China |
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| Abstract: |
| Objective To prepare the nanomaterials with high specific capacity and stable cyclic performance as Li-ion battery anode. Methods The SnO2-SnS2 / GNS composites were prepared by an L-cys-assisted hydrothermal method and characterized by XRD, SEM, TEM and HRTEM. The electrochemical performances of the composites for reversible lithium storage were measured by cyclic voltammogram, galvanostatic charge / discharge and electrochemical impedance spectroscopy. Results With the increasing amount of L-cys in the hydrothermal solution, the content of SnS2 in the low-rise structure of the composite material also increased. The SnS2 / graphene nanocomposite could be prepared when the molar ratio of Sn4+ / L-cys was 1 : 4. The presence of graphene inhibited the growth of SnS2 along the c-axis direction to some extent, and reduced the layer number of the layered SnS2 . Conclusion Because the two-dimensional layered SnS2 had similar morphology and microstructure to graphene, the compositing of the layered SnS2 with graphene exhibited better synergetic effects. Therefore, the SnS2 / graphene nanocomposite showed a high reversible specific capacity with stable cyclic performance and enhanced rate capability. |
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