SnS2/reduced graphene oxide(SnS2/RGO)composites were prepared by hydrothermal method.The phase,chemical groups,elemental composition,specific surface area and pore size of SnS2/RGO composites were characterized by X-ray diffraction spectroscopy(XRD),Raman spectroscopy(Raman),X-ray photoelectron spectroscopy(XPS)and N2 adsorption-desorption.SnS2/RGO composites were used as anode materials for lithium ion batteries to assemble button batteries.The results show that the charge-discharge specific capacity of SnS2/RGO composite is significantly higher than that of pure SnS2 at a current density of 100 mA/g.The first discharge specific capacity of SnS2/RGO composite is as high as 2 803 mAh/g,showing excellent electrochemical performance.After 100 cycles,the discharge specific capacity can still reach 941 mAh/g,while the discharge specific capacity of pure SnS2 is much lower than that of SnS2/RGO composite after 100 cycles,only 198 mAh/g,showing good cycle stability.At a high current density of 1 000 mA/g,the discharge specific capacity of SnS2/RGO composite can still reach 696 mAh/g,showing good rate performance.
关键词
SnS2/还原氧化石墨烯/锂离子电池/电化学性能/电池负极材料
Key words
SnS2/reduction of graphene oxide/lithium ion battery/electrochemical performance/battery anode material
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