Flexible piezoelectric nanogenerator as a self-charging piezo-supercapacitor for energy harvesting and storage application

Abstract

The Piezoelectric nanogenerator reliably generates electrical signals in response to external mechanical stimulation, showing potential applications in flexible sensors and smart wearable devices. In the above content, the present study optimizes the synthesis of piezoelectric composites, incorporating La₂CuMnO₆ (LCuMO) nanoparticles (NPs) into polyvinylidene fluoride (PVDF) and fabricates a highly sensitive PENG using the electrospinning technique. The optimized LCuMO-PVDF electrospun fibre demonstrates a polar β-phase content of up to ∼92 % and shows maximum dielectric constant of ⁓31 at 10 wt% incorporation of the LCuMO nanoparticles. In this context, La₂CuMnO₆/PVDF nanofiber mat-based self-charging piezo-supercapacitor has been prepared and it has been investigated good areal capacitance (111 F/g at 5 mV/s scan rate)) as well the self-charging piezo-supercapacitor (SCPC) device shows ∼95 % of cyclic stability upto ∼2000 CV cycles. The high performance and rapid response of the LCuMO/PVDF-based nanogenerator makes it an excellent sensing technology for self-monitoring and decision-making in cricket and other similar sports. Hence, this study provides valuable insights into the energy conversion & storage process in self-charging supercapacitors and the real-time decision making in the sports as it has been practically demonstrated.