Perovskite Nanocrystals Induced Core–Shell Inorganic–Organic Nanofibers for Efficient Energy Harvesting and Self-Powered Monitoring

Abstract

The emerging field of wearable electronics requires power sources that are flexible, lightweight, highcapacity, durable, and comfortable for daily use, which enables extensive use in electronic skins, self-powered sensing, and physiological health monitoring. In this work, we developed the core−shell and biocompatible Cs 2 InCl 5 (H 2 O)@PVDF-HFP nanofibers (CIC@HFP NFs) by one-step electrospinning assisted self-assembly method for triboelectric nanogenerators (TENGs). By adopting lead-free Cs 2 InCl 5 (H 2 O) as an inducer, CIC@HFP NFs exhibited β-phase-enhanced and self-aligned nanocrystals within the uniaxial direction. The interface interaction was further investigated by experimental measurements and molecular dynamics, which revealed that the hydrogen bonds between Cs 2 InCl 5 (H 2 O) and PVDF-HFP induced automatically well-aligned dipoles and stabilized the βphase in the CIC@HFP NFs. The TENG fabricated using CIC@HFP NFs and nylon-6,6 NFs exhibited significant improvement in output voltage (681 V), output current (53.1 μA) and peak power density (6.94 W m −2 ), with the highest reported output performance among TENGs based on halide-perovskites. The energy harvesting and self-powered monitoring performance were further substantiated by human motions, showcasing its ability to charge capacitors and effectively operate electronics such as commercial LEDs, stopwatches, and calculators, demonstrating its promising application in biomechanical energy harvesting and self-powered sensing.

Wearable, Machine Washable, Breathable Polyethylenimine/Sodium Alginate Layer-by-Layer-Coated Cotton-Based Multifunctional Triboelectric Nanogenerators

“…Energy harvesting from ubiquitous sources has attracted a lot of interest in the present day to meet the increasing demand for renewable energy. − Among the various techniques of energy harvesting, triboelectric nanogenerators (TENG) are considered promising due to the abundance in the selection of materials, ease of use, and appreciable power density offered by such devices. − A variety of TENGs have been reported that are capable of harvesting energy from simple human motions, , wind, and water droplets . However, to power wearable and portable small-scale electronic devices, TENGs that can be effortlessly integrated into clothing are required. − For such reason, textile-based TENGs have also attracted much interest. − …”