摘要
以天然辉锑矿和天然石墨为原料,采用辅助球磨法制备具有不同比例的辉锑矿基Sb_(2)S_(3)/石墨复合材料。通过X射线衍射(XRD)、拉曼光谱(Raman)、扫面电子显微镜(SEM)和透射电子显微镜(TEM)等手段分别表征复合材料的结构、组成和形貌。以不同比例的辉锑矿基Sb_(2)S_(3)/石墨复合材料作为锂离子电池负极材料制备纽扣电池,测试该复合材料的电化学性能。结果表明:随着天然石墨的质量分数的增加,辉锑矿基Sb_(2)S_(3)/石墨复合材料的循环稳定性得到提升,在长循环中保持了高可逆性。其中,Sb_(2)S_(3)/石墨(质量比为1∶1)复合材料在1 A·g^(-1)电流密度下经过110次循环后仍可保持351 mA·h·g^(-1)的放电比容量,容量保持率达到52%。
Using natural stibnite and natural graphite as raw materials,Sb_(2)S_(3)/graphite composites with different proportions of stibnite were prepared by auxiliary ball milling method.The structure,composition and morphology of the composites were characterized by X-ray diffraction(XRD),Raman spectroscopy,scanning electron microscopy(SEM)and transmission electron microscopy(TEM),respectively.Composites of Sb_(2)S_(3)/BG at different ratios were employed as negative electrode for lithium-ion batteries,and their electrochemical properties were evaluated in button batteries.The results show that the cyclic stability of Sb_(2)S_(3)/BG composites improves with increasing natural graphite content,maintaining high reversibility during prolonged cycling.Among them,Sb_(2)S_(3)/BG(mass ratio:1∶1)composite still retains a discharge specific capacity of 351 mA·h·g^(-1) after 110 cycles at a current density of 1 A·g^(-1),achieving a capacity retention rate of 52%.
作者
朱凡
孟必成
刘思名
田小旭
俞娟
ZHU Fan;MENG Bicheng;LIU Siming;TIAN Xiaoxu;YU Juan(School of Metallurgical Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China)
出处
《矿冶》
CAS
2024年第5期684-693,共10页
Mining And Metallurgy
基金
国家自然科学基金资助项目(52374358,51974222)。
关键词
天然辉锑矿
天然石墨
锂离子电池
高比容量负极
电化学性能
natural stibnite
natural graphite
lithium-ion batteries
high specific capacity negative electrode
electrochemical performance
