A unique piezoelectric nanogenerator composed of melt-spun PVDF/KNN nanorod-based nanocomposite fibre

The requirement of portable and wearable electronic gadgets has been increased tremendously in the recent past due to the advancement of self-powered technologies. In the present work, a flexible nanogenerator based on fibrous nanocomposite has been successfully demonstrated. Nanogenerator is composed of PVDF as a polymer matrix and KNN nanorods as a filler material. The PVDF/ICNN composite filaments have been prepared by twin-screw melt mixing and subsequently melt-spinning process with various percentage of KNN nanorods (0%, 2%, 4%, and 6% on the weight of polymer). The nanogenerator was made of PVDF/4%KNN NRs based filament which exhibited the highest F(beta) value (i.e. 26% polar beta phase). The dielectric constant for the PVDF/4%KNN NRs filament based nanogenerator was 175, which is the highest value as compared to other nanogenerators (73 for P-PVDF, 134 for PVDF/2%KNN NRs and 131 for PVDF/6%KNN NRs filament based nanogenerators). The PVDF/4%KNN NRs filament based nanogenerator could also generate around 3.7 V voltage and 0.326 mu A current, respectively. This performance of the nanogenerator is high enough to use in the portable and wearable electronic goods in textiles as a renewable power source.