The effect of Co3O4 content on the material and electrical properties of P(VDF-HFP)/Co3O4 nanocomposites for advanced energy storage and thin film capacitor application

Polymer nanocomposite films of poly (vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP))/Co3O4 were produced to investigate the impact of Co3O4 2D nanomesh on the material and electrical properties of P(VDF-HFP). HRTEM analysis confirmed the rectangular morphology of the Co3O4 2D nanomesh. XRD patterns verified the successful integration of Co3O4 into the P(VDF-HFP) matrix without altering its semi-crystalline structure. FESEM images revealed a uniform distribution of Co3O4 nanomesh throughout the composite films. Optical studies showed a reduction in the bandgap from 5.03 to 2.92 eV with an increasing Co3O4 content. Dielectric characterization demonstrated a significant increase in permittivity at 7.0 wt% Co3O4. Breakdown strength tests revealed a 27.27% improvement compared to the pristine polymer. DSC analysis indicated an increase in crystallization temperature and thermal stability due to Co3O4 addition. TGA results further confirmed enhanced thermal stability with higher Co3O4 content. These findings emphasize the suitability of P(VDF-HFP)/Co3O4 nanocomposites for applications in advanced energy storage, particularly in nanodielectrics and flexible thin-film capacitors, showcasing improved optical, thermal, and electrical properties.