Synthesis of PVDF-SiO2 nanofiber membrane using electrospinning multi-jet vertical on conveyor collector as a lithium-ion battery separator

Abstract

Research on synthesis of PVDF-SiO2 nanofiber membrane by electrospinning multi-jet vertical method on conveyor collector as a lithium-ion battery separator was systematically investigated. Various voltages of 15 kV, 16 kV, and 17 kV and types of PVDF such as Aldrich, Solvay, and both mixtures were used for nanofiber membrane synthesis. The nanofiber membrane was synthesized for 4 hours with a distance between the tip of the needle, and the collector was 10 cm, with a flow rate of 2.6 mL/hour and a collector speed of 37 rpm. Furthermore, the results were tested for the physicochemical properties of the nanofiber. Solution B (PVDF Solvay) treated with 17kV has the largest porosity percentage value of membrane, which was 84.659%. The optimum shrinkage ratio test was from solution A (PVDF Aldrich) with 15 kV, 16 kV, and 17 kV voltages. The smallest average diameter nanofiber was obtained from solution B (PVDF Solvay) with a voltage of 15kV. The FTIR spectrum was not affected by voltages variations. In addition, the nanofiber membrane was assembled in the battery using Aldrich, Solvay, and mixed PVDF types. The battery was then tested for the electrochemical properties of the lithium-ion battery. Solution B (Solvay) has the optimum charge-discharge results showing a specific charge of 107.472 mAh/g and a specific discharge of 77.990 mAh/g.