Intensifying energy density, dielectric and mechanical properties of electroactive β-PVDF/f-BTO nanocomposites

• Published in: Physica. B, Condensed matter Condensed matter, 2019-10, Vol.571, p.149-161
• Main Authors: Tabhane, Gitanjali H., Giripunje, Sushama M., Kondawar, Subhash B.
• Format: Article
• Language: English
• Subjects: Barium titanates; Beta phase; Density; Dielectric constant; Dielectric properties; Efficiency; Energy density; Energy harvesting; Energy storage; Flux density; Functionalized barium titanate (f-BaTiO3/BTOf); Maximum power density; Mechanical properties; Modulus of elasticity; Nanocomposites; Piezoelectric; Polyvinylidene difluoride (PVDF); Power efficiency; Spin coating; Tensile strength
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2019.06.064

In this paper, we report the enhancement of energy density and consequently energy harvesting efficiency of PVDF/f-BaTiO3 nanocomposite. Synthesis of semicrystalline β phase PVDF, PVDF-BTO and PVDF-BTOf composites by spin coating method and their characteristics investigations have been reported. The energy storage density of composite with modified structure was largely increased and was found to be 0.242 J/cm3 at 10 MV/m with 68% energy harvesting efficiency. Maximum dielectric constant was found to be 230 at 1 Hz for PVDF-BTOf composite. Maximum capacitance obtained for PVDF-BTOf composite was 816 μF. From CV and chronopotentiometry scan investigation, the maximum power density was found to be 59.5 W/kg with specific energy density of 0.082 Wh/kg for PVDF-BTO composite. Tensile strength and young's modulus of PVDF-BTOf composite are found to be 6.37 MPa and 48.7 MPa respectively. These results demonstrate a potential way to enhance the performance of composites for energy harvestor, capacitor etc. [Display omitted] •Semicrystalline β phase PVDF, PVDF-BaTiO3 (BTO), PVDF-BTOf (Functionalized BTO) composites synthesized by spin coating.•BTO in PVDF matrix enhanced energy density 140 % higher than reported with 68% efficiency.•Dielectric and mechanical properties of composites improved.•Maximum power density was found to be 59.5 W/kg with specific energy density of 0.082 Wh/kg for composite film.