Enhanced Thermal Stability and Electrochemical Performance of Polyacrylonitrile/Cellulose Acetate‐Electrospun Fiber Membrane by Boehmite Nanoparticles: Application to High‐Performance Lithium‐Ion Batteries

In this study, polyacrylonitrile/cellulose acetate (PAN/CA) composite nanofiber membranes with different boehmite contents are prepared by electrospinning. The physical and electrochemical properties of the membrane as a separator in lithium batteries investigated. contrast to commercial polypropylene (PP), nanocomposite fiber has 3D network structure, higher porosity, thermal stability, electrolyte absorptivity, ionic conductivity, better cycling performance. PAN/CA 12 wt% highest conductivity (1.694 mS cm−1); specific discharge capacity is 160 mAh g−1 at 0.2 C density retention rate 99.3% after 100 cycles. cycle 2 (88.75%). These results indicate that PAN/CA/AlOOH can be expected replace polyolefin behave high-performance for lithium-ion batteries.