Evaporation-induced self-assembled silica colloidal particle-assisted nanoporous structural evolution of poly(ethylene terephthalate) nonwoven composite separators for high-safety/high-rate lithium-ion batteries

摘要: Abstract A facile approach to the fabrication of nanoporous structure-tuned nonwoven composite separators is demonstrated for application in high-safety/high-rate lithium-ion batteries. This strategy based on construction silica (SiO2) colloidal particle-assisted structure a poly(ethylene terephthalate) (PET) substrate. The nanoparticle arrangement arising from evaporation-induced self-assembly SiO2 particles allows evolution unusual structure, i.e. well-connected interstitial voids formed between close-packed adhered by styrene-butadiene rubber (SBR) binders. Meanwhile, PET serves as mechanical support that contributes suppressing thermal shrinkage separator. aforementioned structural novelty separator plays key role providing with advantageous characteristics (specifically, good electrolyte wettability, high ionic conductivity, and benign compatibility electrodes), which leads better cell performance than commercialized polyethylene (PE)