Journal
IONICS
Volume 25, Issue 8, Pages 3673-3682Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-019-02940-7
Keywords
Electrospinning; Gel polymer electrolyte; Polyacrylonitrile; Thermoplastic polyurethane; Polystyrene
Funding
- Youth Project of National Nature Science Foundation of China [51103124, 51203131]
- Hunan Province Universities Innovation Platform of Open Fund Project [11K067]
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Using an electrospinning method, high-performance gel polymer electrolytes (GPEs) comprising polyacrylonitrile/thermoplastic polyurethane/polystyrene (PAN/TPU/PS) were prepared. Then, these electrolytes were used to assemble button cells. The GPEs exhibited a maximum ionic conductivity of 3.9x10(-3)Scm(-1) at room temperature, with an electrochemical stability of 5.8V. In addition, a Li/GPE/LiFePO4 cell showed first charge and discharge capacities of 161.70mAhg(-1) and 161.44mAhg(-1), respectively, at a 0.1 C rate and a stable cycle performance (the capacity retention was nearly 94% after 50 cycles) with high coulombic efficiency. Additionally, the SEM images showed that the PAN/TPU/PS was not composed of beaded-fibres in a fibrous membrane but was composed of fibres that were slim with a uniform size distribution. The uptake behaviour and porosity of the PAN/TPU/PS fibres showed the best performance and superior physical properties of the tested samples (the elongation at break of the film was 115.15%, and the tensile strength was 9.86MPa). Considering these results, the PAN/TPU/PS blend/composite film has broad prospects for use in lithium-ion batteries.
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