Hybrid piezo/triboelectric nanogenerator for stray magnetic energy harvesting and self‐powered sensing applications

Abstract

Stray magnetic fields with a fixed frequency of 50/60 Hz are ubiquitous in buildings, factories, and power system equipment. Researchers are increasingly focusing on harvesting electrical energy from stray magnetic fields to provide sustainable energy for the Internet of Things (IoT) devices. Magneto-mechano-electric energy conversion is the most efficient way to convert low-frequency stray magnetic fields into electricity. In this study, we proposed a hybrid piezo/triboelectric nanogenerator (HP/TENG) on the basis of a cantilever beam to use stray magnetic fields from the surrounding environment. The hybrid nanogenerator provided high output voltage/current and power of ∼176 V/ 375 μA and 4.7 mW (matched impedance of 20 kΩ) in a magnetic field environment of 4 Oe. The device provided a stable 3.6 V direct current output by incorporating energy management circuitry to sustainably drive power to commercial wireless temperature/ humidity sensors. The HP/TENG has a significant application potential in IoT, which can use stray magnetic energy and a power wireless sensor system.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

An extremely low temperature environment operatable hybrid dual-functioning energy device driven by a supercapacitor/piezo–triboelectric generator system

“…The device has also been tested with altered load resistances, and the power yield has been found to increase with increasing load resistance, with the ideal load resistance depending on the operational and active parameters of the system. 60,61 The similarity in the output power variation with load resistance between the AC and DC outputs is expected, given that the transduction tool is the same in both cases.…”

Recent Progress in Self-Powered Wireless Sensors and Systems Based on TENG

“…Many TENGs are designed to power other sensors, and the collected signals are transmitted to the receiving device through Bluetooth or other modules, realizing the self-powered wireless environment sensor system. Figure 3 e shows a hybrid piezoelectric/triboelectric nanogenerator based on a cantilever beam that exploits the stray magnetic field of the ambient environments [ 57 ]. The P/TENG delivers high open-circuit voltage (176 V), short-circuit current (375 μA), and maximum output power of ∼4.7 mW under a 4 Oe alternating-current magnetic field induced by a Helmholtz coil.…”

“…( e ) A hybrid piezo/triboelectric nanogenerator for stray magnetic energy harvesting and a system for temperature and humidity monitoring. Reproduced with permission [ 57 ]. Copyright 2021, John Wiley & Sons.…”

Application status and development trends for intelligent perception of distribution network

“…The integration of sensing and energy supply technology can realize low power consumption and self-driving of sensing terminals [56]. The typical technologies include integrated current sensing and magnetic field energy extraction technology based on magnetoelectric materials.…”