【摘要】 以煤焦油和SnCl2为原料,采用液相分散和碳热还原的方法制备了一种新型的锡/碳(Sn/C)复合材料。采用XRD、SEM及TEM手段对复合材料进行了结构表征,并对材料的电化学性能进行了检测。结果表明,金属锡以200nm大小的颗粒分散在碳材料中,复合材料的首次放电容量在371mAh.g-1,循环50次后比容量维持在305mAh.g-1以上,具有优异的循环性能。更多还原

【Abstract】 A novel process was proposed to prepare Sn/mesophase carbon(Sn/C) composite anode material for lithium-ion battery.The Sn/C composite was successfully prepared by dispersing SnCl2 in coal tar picth,followed by carbonization and carbothermal reduction in an inert atmosphere.X-ray diffraction(XRD),scanning electron microscopy(SEM) and transmission electron microscopy(TEM) were employed to determine the structure and configuration.The results showed that the metallic Sn was encapsulated within the carbon matrix with the size of about 200 nm.The composite exhibited good reversible capacity of 371mAh·g-1 at the first time. After 50 cycles the reversible capacity remained high capacity of 305mAh·g1,showing excellent cycle performance and higher capacity.更多还原