Abstract
A novel high-performance gel polymer electrolyte (GPE) based on poly(vinylidene fluoride) (PVDF), thermoplastic polyurethane (TPU) and polystyrene (PS) has been prepared. Its characteristics are investigated by scanning electron microscopy (SEM), thermal analysis (DSC), universal testing machines (UTM), galvanostatic charge-discharge and electrochemical impedance spectroscopy. The GPE based on TPU/PVDF/PS (10 wt.%) show a high ionic conductivity of 5.28 × 10-3 S cm-1 with the electrochemical stability window of 5.0 V. In addition, its first charge-discharge capacity reached to 169.5 mAh g-1, high mechanical strength and stability to allow safe operation in rechargeable lithium ion polymer batteries.
Highlights
Polymer-based nanocomposites have attracted considerable academic and industrial attention over the years.[1,2] Various combinations of polymer matrices and nanofillers have been investigated
All of these four membranes show a microporous structure, but we can see that the fibers of thermoplastic polyurethane (TPU)/poly(vinylidene fluoride) (PVDF)/PS (Fig.1(b)[10] wt.%) are relatively uniform and slender, with the diameter distribution about 1μm
gel polymer electrolyte (GPE) based on fibrous TPU/PVDF/PS blend membranes were prepared by electrospinning the polymer solution in DMF/acetone (3:1, w/w) at room temperature
Summary
Polymer-based nanocomposites have attracted considerable academic and industrial attention over the years.[1,2] Various combinations of polymer matrices and nanofillers have been investigated. Gel polymer electrolytes (GPEs) have been reported with high ionic conductivity at room temperature, stable and well compatibility with lithium electrodes,[3,4,5] and good mechanical stability. In order to investigate the influence of various polymer concentration stresses on the TPU/PVDF/PS fiber membranes, membrane morphology, charge and discharge capacity, ionic conductivity, and mechanical properties will be examined systemically. Primary results showed that it is very suitable for application in lithium ion batteries
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