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A poly(vinylidene fluoride)/tetraethyl orthosilicate silane (PVDF/TEOS) composite separator with a fingerlike pore structure for lithium-ion batteries has been prepared by non- solvent-induced phase separation (NIPS) [114]. This novel PVDF/TEOS composite separator shows an ion conductivity of 1.22 mS.cm-1 at 25 °C, lithium-ion transference number with 0.7% TEOS of 0.481and show good cycling performance and rate capability [114]. A novel core-shell structured poly-m-phenyleneisophthalamide@polyvinylidene fluoride (PMIA@PVDF) nanofiber separator was successfully synthesized via facile coaxial electrospinning as shown in Figure 5.4a). Figure 5.4b presents the schematic functional principle of this separator [115]. Figure 5.4 - Schematic illustration for the: a) preparation and b) functional principle of PMIA@PVDF nanofiber separators [115]. This PMIA@PVDF separator presents a prominent improvement on electrolyte uptake and ionic conductivity and maintains its integrity to prevent thermal shrinkage [115]. 28PDF Image | Synthetic Polymer-based Membrane for Lithium Ion
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