Nanocrystal-SnO2-Loaded Graphene with Improved Li-Storage Properties Prepared by a Facile One-Pot Hydrothermal Route

作者：Xie, Jian; Liu, Shuang-Yu; Chen, Xue-Fei; Zheng, Yun-Xiao; Song, Wen-Tao; Cao, Gao-Shao; Zhu, Tie-Jun; Zhao, Xin-Bing^*

来源：International Journal of Electrochemical Science, 2011, 6(11): 5539-5549.

• SnO2
• graphene
• nanocomposite
• Li-storage properties
• anode

Nanpcrystal-SnO2-loaded graphene was synthesized by a facile in situ one-pot hydrothermal route. The effects of tin sources (Sn2+ or Sn4+) and graphene on the morphology and electrochemical properties of SnO2 have been investigated. It was found that the graphite oxide plays a critical role in the oxidation of Sn2+ to Sn4+, and that SnO instead of SnO2 forms without adding the graphite oxide. SnO2 exhibits a smaller size (below 10 nm) and a more homogeneous dispersion on graphene using Sn2+ as the precursor compared with the case using Sn4+ as the precursor. The electrochemical tests showed that the SnO2-graphene nanocomposites exhibit obvious improved electrochemical properties compared to bare SnO2 due to the buffering, confining and conducting effects of the introduced graphene. We also found that the nanocomposite using Sn2+ as the precursor shows a better cycling stability than that using Sn4+ as the precursor.

• 出版日期2011-11
• 单位浙江大学