Electrochemical Performances of Polyacrylonitrile Nanofiber-Based Nonwoven Separator for Lithium-Ion Battery

The polyacrylonitrile (PAN) nanofiber-based nonwoven separators for lithium-ion batteries have been developed by electrospinning technique. Scanning electron microscopic observation showed that the electrospun PAN nanofibers had homogeneous thickness and their diameters were around . Cyclic voltammetry revealed that the separator was electrochemically stable between 3 and vs Li. The cells with the PAN separators showed better cycle performance than conventional ones at a moderate rate of C/2. In the rate-capability and pulse discharging tests, the cells with the PAN-based separators exhibited superior rate-capabilities and smaller diffusion resistance at high rate test than conventional one.