SnO_(x)S_(y)@PANI@rGO复合材料的制备及其电化学性能

Synthesis of tin-oxygen sulfide compound@polyaniline@reduced graphene composites with superior electrochemical performance

利用水热法合成二硫化锡六方晶片,通过氧化聚合包裹聚苯胺,水热还原制备锡氧硫化合物@聚苯胺@还原氧化石墨烯(SnO_(x)S_(y)@PANI@rGO)复合材料.分别利用X射线衍射(X-ray diffraction,XRD)、傅里叶变换红外(Fourier transform infrared,FT-IR)光谱、扫描电子显微镜(scanning electron microscope,SEM)和透射电子显微镜(transmission electron microscope,TEM)对材料进行形貌和物相分析,结果表明:制备的六方形SnO_(x)S_(y)被PANI和rGO双层包覆.将复合材料作为锂离子电池的负极进行电化学性能研究,结果显示:由于多元复合材料中的聚苯胺和还原石墨烯增加了其导电性,缓冲了SnO_(x)S_(y)在充放电过程的体积膨胀,保持了结构稳定性,展现了优越的电性能.

By hydrothermal synthesis of tin disulfide hexagonal wafers,polyaniline was wrapped outside by using oxidative polymerization,and tin-oxygen sulfide compound@polyaniline@reduced graphene oxide composites were prepared by hydrothermal reduction.Characterization instruments of X-ray diffraction(XRD),Fourier transform infrared(FT-IR)spectroscopy,scanning electron microscope(SEM),and transmission electron microscope(TEM)were used to analyze the morphology and phase of the composites.The results show that the prepared hexagonal tin oxysulfide compound is double-coated by polyaniline and reduced graphene.The electrochemical properties of the composites as a negative electrode of a lithium-ion battery were investigated.The results reveal that the polyaniline and reduced graphene in the multicomponent composite increase the conductivity and buffer the volume expansion of the tin-oxygen sulfide compound during charge and discharge,maintain structural stability,and exhibit superior electrical performance.