Electrospun electroactive polyvinylidene fluoride-based fibrous polymer electrolyte for sodium ion batteries

Le résumé fourni par la source

Electrospinning is an efficient technique to produce ultrafine electroactive mat, diameters ranging from few nanometers to micrometers to use as a separator in sodium ion battery. The polyvinylidene fluoride (PVDF) polymer solution was optimized to 19 wt%, applied voltage 25 kV and flow rate of 0.5 ml h −1 to get a bead free ultrafine electroactive structure. The electroactive β -phase is confirmed by x-ray diffractometer (XRD). Ionic conductivities, electrolyte uptake, wettability, linear sweep voltammetry (LSV) and thermal stability of the electroactive fibrous polymer electrolyte (EFPE) were studied by soaking the separator with a liquid electrolyte of 1 M sodium hexafluorophosphate (NaPF 6 ) dissolved in ethylene carbonate (EC)/propylene carbonate (PC) (1:1 vol%). The EFPE exhibits high ionic conductivity of 1.08 mS cm −1 and electrochemical stability window of 5.0 V versus Na/Na + under ambient condition. The half-cell containing Na 0.66 Fe 0.5 Mn 0.5 O 2 as cathode and EFPE as the separator cum electrolyte showed a stable cycling performance at a current rate of 0.1C.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.