空心SnO_2@G复合材料的结构表征及其储锂性能研究

Characterization and lithium storage performance of hollow SnO_2@G nanocomposite

本文采用简易湿化学法制备石墨烯包裹的空心二氧化锡复合材料(SnO_2@G)。利用X射线衍射仪(XRD)和透射电子显微镜(TEM)手段表征其形貌、成分及微观结构,并测试其锂离子电池负极性能。结果表明空心SnO_2纳米颗粒尺寸约为300~400 nm,且均匀包裹在石墨烯里面,锂电性能测试结果显示复合材料与纯SnO_2有着良好的循环性能、较高的比容量和良好的倍率性能。

In this paper,a novel hollow SnO2@ graphene had been synthesized via a simple wet chemical method. The morphology,and structures of SnO2@ G composites were characterized by Transmission Electron Microscopy（ TEM） and X-ray diffraction（ XRD）.The results showed that the sizes of SnO2 nanoparticles were 300 to 400 nm. Hollow SnO2 nanoparticles were well wrapped with graphene coating. Compared to SnO2,SnO2@ G electrode showed superior electrochemical performance with excellent cyclic stability,high capacity and good electrochemical capacity.