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

• Published in: Nano energy 2019-05, Vol.59, p.169-183
• Main Authors: Karan, Sumanta Kumar, Maiti, Sandip, Agrawal, Anand Kumar, Das, Amit Kmar, Maitra, Anirban, Paria, Sarbaranjan, Bera, Aswini, Bera, Ranadip, Halder, Lopamudra, Mishra, Avnish Kumar, Kim, Jin Kon, Khatua, Bhanu Bhusan
• Format: Article
• Language: English
• Subjects: e-healthcare monitoring; Flexible MSPNG; Multi-energy harvester; Power densities and energy conversion efficiencies; PVDF; Vitamin B2
• ISSN: 2211-2855
• DOI: 10.1016/j.nanoen.2019.02.031

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 B2 (VB2) assisted PVDF based multifunctional advanced energy material with high out-of-plane piezoelectric co-efficient of ~ –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 β-phase (~93%) stabilizer for PVDF and would be better replacement of non-toxic expensive stabilizers. The fabricated nanogenerator reveals high output current (≈12.2 μA) and voltage (≈61.5 V), theoretically verified with finite element method (FEM) based simulation. The device with fast-charging capability shows remarkable peak power density of ≈9.3 mW/cm3 and ultrahigh energy conversion efficiency (≈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. A flexible and biocompatible multi-functional energy harvester based on inexpensive biocompatible VB2 as a first time reported novel β- phase stabilizer and PVDF as piezoelectric material, is well designed through a simple cost-effective and judicious control of device fabrication method. The MSPNG device shows an enormous improvement in the output voltage (~61.5 V) and current values (~12.2 µA) with remarkable power density of ≈9.3 mW/cm3 and outstanding energy conversion efficiency (≈62%) under external mechanical stress (0.50 MPa) are the highest in comparison to various reported bio/non-based piezoelectric energy harvester [Display omitted] •Vitamin B2 (VB2) assisted PVDF based multifunctional energy material with d33 value ~ –50.3 pC/N, is reported first t