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中文摘要：
实验首先采用改进的Hummers法制备氧化石墨,然后以氧化石墨烯为前驱体,通过水热法将锡酸钴纳米颗粒均匀镶嵌在石墨烯薄膜基片上,最终获得Co2SnO4/Graphene镶嵌复合材料.采用X射线衍射（XRD）、扫描电子显微镜（SEM）对材料的结构和形貌进行表征,通过恒电流充放电（CC）、循环伏安法（CV）与交流阻抗法（EIS）测试了材料的电化学性能.实验结果表明,石墨烯良好的分散性及较高的电子导电率,可以提高锡酸钴材料的电化学性能,材料首次可逆容量达到1415.2 mA·h/g,50次循环后仍能保持469.7 mA·h/g的放电比容量.
英文摘要：
Co2SnO4/graphene composite has been prepared by multi-step synthetic process. Firstly, the formation of Co2SnO4 and the reduction of graphene oxide（GO） occur simultaneously during the hydrothermal process and the Co2SnO4 particles are uniformly embedded in the film-like graphene to form a mosaic structure. To characterize the phase and morphology of the composite material, X-ray diffraction（XRD）, scanning electron microscope（SEM） are used. The constant current charge and discharge（CC）, cyclic voltammetry（CV） and electrochemical impedance spectroscopy（EIS）are also used to test the electrochemical performance of Co2SnO4/graphene composite. Results show that graphene can effectively improve the electrochemical performance of Co2SnO4/graphene composite by its good dispersibility and high electrical conductivity. The composite material exhibits a first discharge specific capacity of 1415.2 mA·h/g with the specific capacity still higher than 469.7 mA·h/g after 50 cycles.
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