【摘要】 通过高温煅烧乙二胺四乙酸二钠和四氯化锡混合物,制备了Sn/碳多孔复合材料。用X射线衍射和扫描电镜对材料的物相组成和形貌进行了表征,用循环伏安和恒流充放电技术测试了材料的储锂性能。结果表明:Sn/碳多孔复合材料呈多层夹心结构,作为锂离子电池负极材料经过100次充放电循环,可逆比容量保持在767 m Ah/g,在1C倍率下容量达到391 m Ah/g。更多还原

【Abstract】 Porous Sn/carbon composites were prepared by heat treatment of disodium ethylenediaminetetraacetic acid and Sn Cl4·5H2O. The phase composition and morphology of the composites were characterized by X-ray diffraction and scanning electron microscopy and lithium storage performance of the products was carried out by cyclic voltammetry and galvanostatic charge/discharge electrochemical techniques. The results show that porous Sn/carbon composites displayed a multilayer sandwich structure and exhibited high reversible capacity of 767 m Ah/g after 100 charge/discharge cycles as the anode material for lithium ion batteries. Moreover, the reversible capacity remained 391 m Ah/g even at 1C.更多还原