Designing high energy conversion efficient bio-inspired vitamin assisted single-structured based self-powered piezoelectric/wind/acoustic multi-energy harvester with remarkable power density

Development of flexible, durable and biocompatible piezoelectric/acoustic/wind multi-functional energy harvester with remarkable energy conversion efficiency, high current, and power density is of great challenge in scavenging electricity from multi-modes of energy sources for powering real smart electronics and e-healthcare monitoring devices. Here, bio-inspired vitamin B-2 (VB2) assisted PVDF based multifunctional advanced energy material with high out-of-plane piezoelectric co-efficient of similar to-50.3 pC/N, is reported first time for harvesting huge electrical energy from multi-modes of alternative energy sources in a single device. Thus, an entirely organic based fully biocompatible piezoelectric nanogenerator (PNG) having multifunctional energy harvesting capabilities at a time (mechanical/acoustic/wind) has been designed by integrating VB2 with PVDF. VB2 is introduced in energy-harvesting family for first time as an effective beta-phase (similar to 93%) stabilizer for PVDF and would be better replacement of non-toxic expensive stabilizers. The fabricated nanogenerator reveals high output current ( approximate to 12.2 mu A) and voltage ( approximate to 61.5 V), theoretically verified with finite element method (FEM) based simulation. The device with fast-charging capability shows remarkable peak power density of approximate to 9.3 mW/cm(3) and ultrahigh energy conversion efficiency ( approximate to 62%) enabling lightening more than 100 LEDs directly and can power up a CD motor/mobile through capacitor charging. Moreover, generation of electricity from various noises allows potentiality of the device as an artificial acoustic ultra-sensor. Thus, it would provide more opportunities towards next generation multifunctional emerging power sources and in e-healthcare monitoring.