Electrospinning can regulate fiber and membrane structures at the nanoscale, and doping graphene futher enhances the electrochemical function of nanofilms. Starting from the structure of graphene, we optimize the relationship between graphene doping ratio and nanofiber size and study the effects of electrospinning voltage, feed rate, spinning distance and time on membrane structure and electrochemical performance. Research has shown that when the graphene doping mass fraction in the nanofilm is 7%, the voltage is 24 kV, the spinning distance is 15 cm, the feed rate is 0.01 mL/min, and the time is 2 h, the diameter of the fibers in the nanofilm structure is 0.162 μm, and the impedance is 220.8 Ω. Under electrospinning conditions, the doping of graphene can control the preparation of nano films and optimize their electrochemical properties in multiple ways.

In order to explore the preparation process of graphene?reinforced composite materials with industrial development prospects, graphene/polypropylene composite materials were prepared using the melt blending method, and the graphene reinforcement mechanism was analyzed through experimental and computational analysis. The results indicate that through melt blending, graphene can be uniformly dispersed in the matrix. The tensile strength of the composite material with a graphene mass fraction of 0.5% is 50.3 MPa. When the mass fraction of graphene is 4.0%, the elastic modulus and tensile strength of the composites are increase by 77.1% and 22.5%, respectively, compared to the polypropylene matrix alone. The uniform dispersion of graphene and the interaction between graphene and the polypropylene matrix enable effective stress transfer at the graphene/polypropylene interface.