Preparation Of Electrospun Sn/C Nanofiber Composite As Anode For High Performance Lithium-Ion Batteries

As an efficient and clean new energy, rechargeable lithium-ion batteries have attracted much attention. Thus, much work have done to improve the performance of lithium ion battery. As the key factor, anode material encountered many problems, The main efforts focused on the anode material,which is one of the main factors on improving the performance of lithium-ion battery in recent years. Tin-based materials attracted many scholars, because of their high theoretical capacity (994mAhg-1). However, the tin-based material is greatly hampered by the poor cyclability as anode of LIB. The current strategies is to overcome these shorage.In this work, Sn nanoparticles-loaded carbon (Sn/C) nanofibers were fabricated from electrospun SnCl4/MEG/PAN/DMF composite nanofibers by modifying the composition of the spinning solution and the carbonization temperatures. And to study the carbonization time and temperature on the material structure, properties.SEM,TEM,XRD and DSC indicate that, as the extension of carbonation time and the elevation of carbonation temperature, Tin is from amorphous to cryxtalline, and migrates to the surface of the fibers.And from TG and EDX,the tin in the composites is 23.7%. Electrical performance tests show that amorphous Sn/C nanocomposite lithium storage performance than crystalline Sn/C nanocomposites.The Sn/C nanofibers carbonized at 850℃for 1h with amorphous tin illustrate the best electrical performance, and first coulomb efficiency is 73.7%, after 60 cycles,the reversible capacity was 680.4 mAhg-1, The Sn/C nanofibers carbonized at 850℃for 1h maintain a very good electrical property under different cycling rates. The Sn/C nanofibers retains its integrity fiber structure and crystal structure after cycles.