Enhanced piezoelectric performance of lead free BCZT based flexible nanogenerator

Piezoelectric nanogenerator are attracting a lot of attention due to environmental constraints and the ecological considerations of energy collection. A piezoelectric nanocomposite based on Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 (BCZT) nanoparticles and PDMS polymer with excellent output properties for the application of nanogenerators has been developed. The piezoelectric nanogenerator is smart device that offers these required qualities and properties and converts mechanical energy. Here PENG can generate an open circuit voltage of 10 V respectively under the effect of light finger tapping. It reaches an output power of $\mathrm{P}=2.218\ \mu\mathrm{W}$ for a resistance $\mathrm{R}=370\ \mathrm{k}\Omega$ under shaker vibration. This generator is known by its simple and ordinary design as well its high performance after polarization. However, the polarization is long and unsafe. To avoid this problem, a homogeneous distribution of carbon nanotubes (CNTs) on the BCZT/PDMS matrix is the best solution to have self-polarized generator. In this study, piezoelectric nanocomposites were prepared using solution mixing method. A comparative study was performed to investigate the impact of CNTs on the performance of nanogenrators under external mechanical load. The nanogenerator with 15 wt.% BCZT doped with CNTs offers an outstanding output performance with an open circuit voltage of 15 V and an output power $\mathrm{P}=5.68029\ \mu\mathrm{W}$ at a resistance load $\mathrm{R}=350\ \mathrm{k}\Omega$ using the shaker device.