Enrichment of specific capacitance and functional properties of Polytetrafluoroethylene composite work with CNT/graphene hybrids

Polytetrafluoroethylene (PTFE) is widely used in high-frequency electronic applications due to its unique properties,including superior chemical resistance, dielectric properties, and thermal stability. This material is integrated into the electrode system to have better energy storage. However, it found low electrical conductivity, reduced sheet resistance, and variations in surface area limit the functional properties of PTFE. This research aims to enhance the functional properties of PTFE by embedding it with different ratios of carbon nanotube (CNT)-graphene hybrids via a vacuum filtration production method. The influences of CNT-graphene hybrids on sheet resistance, conductivity, BET surface area, thickness,
areal loading, Raman (ID/IG ratio), and specific capacitance (F/G) of PTFE are investigated and related to the base (PTFE
matrix). The 30:70 CNT: Graphene hybrid composition exhibited optimal performance, with a sheet resistance of 145 Ω/sq and an electrical conductivity of 158 S/m. The Brunauer–Emmett–Teller (BET) surface area, thickness, and areal loading were measured to be 1163 m²/g, 16 μm, and 1.20 mg/cm². The Raman ratio was 0.96 for the 30:70 compositions, and the specific capacitance was 292 F/g. This composition of PTFE/CNT/graphene hybrid is a trade-off for electrode applications.