Preparation and characterization of electrospun Sn/polyacrylonitrile nanofiber membranes

Nano-tin(Sn) was blended with polyacrylonitrile(PAN) and Sn/PAN nanofiber membranes were prepared by electrospinning,and followed by carbonization treatment of the nanofiber membranes.Scanning electron microscopy,transmission electron microscopy and X-ray diffraction were used to characterize the nanofiber by the average fiber diameter,diameter distribution,the presence of Sn in the nanofibers,and the degree of crystallinity of Sn after being added to the PAN and electrospun.The carbonized nanofibrous membranes were made into cathodes of lithium-ion batteries whose electrochemical properties were tested.The results showed that as the voltage rises or curing spinning distance increases,the fiber diameter decreases.When the electrospinning voltage is 14 kV,solidification distance is 14 cm,the average fiber diameter is smaller,and the distribution is most uniform.Sn was aggregated when electrospinning and the degree of crystallinity decreased significantly.Sn/PAN,used as the cathodes of lithium-ion batteries,exhibits good energy-storage performance.