fig3

Figure 3. Li⁺ transport of separators and interaction with electrolyte. (A) CV profiles of Li||SS cells with 3 separators; (B) Tafel curves of 3 separators; (C) E_a obtained from linear fitting with Arrhenius equation; (D) ³¹P NMR spectra and (E) ¹⁹F NMR spectra of electrolyte and different separators with electrolyte; (F) ⁷Li NMR spectra of electrolyte and PEI-EDA separator with electrolyte; (G) FT-IR spectra between 3,400-3,100 cm^-2 of PEI-EDA separator with and without electrolytes; (H) Schematic representation of the Li⁺ transfer mechanism in the PEI-EDA separator. CV: Cyclic voltammetry; NMR: nuclear magnetic resonance; PEI-EDA: ethylenediamine grafting polyetherimide; FT-IR: fourier transform infrared; PP: polypropylene; PEI: polyetherimide.