A novel high-performance gel polymer electrolyte (GPE) based on an electrospun polymer membrane of poly(vinylidene fluoride)/ poly(propylene carbonate) (PVdF/PPC) was prepared and investigated for high-performance lithium-ion battery applications. This study presents a methodology for introducing PPC into PVdF-based GPEs designed for highperformance lithium-ion batteries. SEM images and porosity measurements showed that the electrospun membrane had a uniform and highly interconnected porous structure with an average fiber diameter of 300−850 nm. Such a morphology resulted in excellent electrolyte uptake amount (500 wt %) and retention in PVdF/PPC membrane. The DSC result indicated that the PVdF crystallinity was deteriorated by the incorporation of PPC. The PVdF/PPC electrospun membrane showed significantly higher ionic conductivity (4.05 mS•cm −1 ) than that of the PVdF electrospun membrane (2.11 mS•cm −1 ) at 30 °C. The PVdF/PPC GPE was stable at a potential higher than 5.2 V (versus Li + /Li). The capacity of Li/ CGE-20/LiFePO 4 was 160, 151, 133, 119, and 102 mAh g −1 at a charge/discharge rate of 0.1, 0.2, 0.5, 1, and 2 C, respectively.
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