Study on Synthesizing a Novel Sn/MC Composite as Anode Material in Lithium-ion Battery

摘要

A novel process was proposed to prepare Sn/mesophase carbon(Sn/MC) composite anode material for lithium-ion battery for the first time. The Sn/MC composite was successfully prepared by dispersing Sn(OH)_4 in coal tar picth, followed by polymerization, 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 show that the metallic Sn was encapsulated within the carbon matrix uniformity by carbothermal reduction. The electrochemical performance was examined. It exhibits a stable capacity of 400 mAh g~(-1) after 60 cycles and the first reversible capacity was as high as 600 mAh g~(-1), showing excellent cycle performance and higher capacity. The proposed process paves an effective way to prepare high-performance and higher capacity Sn/C composite anode material for lithium-ion battery.