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Membranes 2021, 11, x FOR PEER REVIEW 5 of 11 Membranes 2021, 11, 267 5 of 11 Figure1.FT-IRspectraofelectrospunPANseparator,phenoxyresin/PPANsseeppaararaatotor,r,,andZ/P/PAPAANN-- 1.5 separators. Figure 2 depictsthesurfacemorrphollologgyyooffththeelelcetcrtorosopspupununPAPANANsespeaprartaoatrtoarnadndifdfieifr- ent composite separators after immersing in 5 wt% phenoxy resin solution. It is observed ferent composite separators after immersing in 5 wt% phenoxy resin solution. It is ob- in Figure 2a that the surface of PAN fiber is smooth and uniform without beads. According served in Figure 2a that the surface of PAN fiber is smooth and uniform without beads. to Figure S1, it can be seen the average diameter of the fibers in the membrane is 180 nm. According to Figure S1, it can be seen the average diameter of the fibers in the membrane PAN fibers were simply lapped together to form a PAN separator after heat treatment. is 180 nm. PAN fibers were simply lapped together to form a PAN separator after heat Although the large number of voids in the structure of PAN separators can better absorb treatment. Although the large number of voids in the structure of PAN separators can the electrolyte, its poor mechanical properties cannot reach the minimum requirements for better absorb the electrolyte, its poor mechanical properties cannot reach the minimum use. Figure 2b–f presents that phenoxy resin forms a certain bonding effect on the surface requirements for use. Figure 2b–f presents that phenoxy resin forms a certain bonding of PAN fibers, which helps to enhance the mechanical properties of PAN separators. As effect on the surface of PAN fibers, which helps to enhance the mechanical properties of the concentration of ZSM-5 increases, the composite separator exhibits more and more PAN separators. As the concentration of ZSM-5 increases, the composite separator exhib- particles. After embedding a few ZSM-5 particles into the composite separators, the sepa- its more and more particles. After embedding a few ZSM-5 particles into the composite rators’ absorption of the electrolyte is enhanced due to the multistage pore structure inside separators, the separators’ absorption of the electrolyte is enhanced due to the multistage ZSM-5 nanoparticles [37]. pore structure inside ZSM-5 nanoparticles [37]. Figure 2. SEM micrographs for the surface of electrospun PAN separator and composite separator with different ZSM-5 concentra- Figure 2. SEM micrographs for the surface of electrospun PAN separator and composite separator with different ZSM- tions: (a) PAN, (b) Z/PAN-0, (c) Z/PAN-0.5, (d) Z/PAN-1, (e) Z/PAN-1.5 and (f) Z/ PAN-2. 5 concentrations: (a) PAN, (b) Z/PAN-0, (c) Z/PAN-0.5, (d) Z/PAN-1, (e) Z/PAN-1.5 and (f) Z/ PAN-2.PDF Image | Electrospinning Polyacrylonitrile Separator with Dip-Coating of Zeolite
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