Conjunction of triboelectric nanogenerator with induction coils as wireless power sources and self-powered wireless sensors

Abstract

Here we demonstrate a magnetic resonance coupling based wireless triboelectric nanogenerator (TENG) and fully self-powered wireless sensors. By integrating a microswitch and an inductor with the TENG, the pulsed voltage output is converted into a sinusoidal voltage signal with a fixed frequency. This can be transmitted wirelessly from the transmit coil to the resonant-coupled receiver coil with an efficiency of 73% for a 5 cm distance between the two coils (10 cm diameter). Analytic models of the oscillating and coupled voltage signals for the wireless energy transfer are developed, showing excellent agreement with the experimental results. A TENG of 40 × 50 mm2 can wirelessly light up 70 LEDs or charge up a 15 μF capacitor to 12.5 V in ~90 s. The system is further utilized for two types of fully self-powered wireless chipless sensors with no microelectronic components. The technologies demonstrate an innovative strategy for a wireless ‘green’ power source and sensing.

Design and engineering of high‐performance triboelectric nanogenerator for ubiquitous unattended devices

“…The harvested energy (0.495 μJ) per cardiac motion cycle was enough to drive the pacemaker (the threshold energy was 0.377 μJ) and realize the self-powered cardiac pacing, which provides a feasible scheme for unattended implantable devices to realize self-powered and sustainable operation. To reduce the energy loss during conversion and storage, Zhang et al 223 demonstrated a wireless power source based on a CS-TENG with a bi-contact micro switch used to reduce the output impedance of the TENG and the inductor coils ( Figure 7D). The microswitch was only closed when the TENG was at the maximum separation or in contact states.…”

Triboelectric nanogenerators enabled internet of things: A survey

“…(d) Diagram (left) and corresponding circuit (right) of the wireless power transfer network combined with magnetic resonance. Reproduced with permission [90] . Copyright 2020, Springer Nature.…”

“…The energy could be transferred wirelessly in real time to a length of 60 cm, relying on helical coils. In 2020, Zhang et al [90] demonstrated a wireless TENG based on magnetic resonance coupling, which is shown in Fig. 15d.…”

Deep learning enabled smart mats as a scalable floor monitoring system

“…Combining the low-cost triboelectric sensing mechanism with the large-scale printing technique offers a promising solution. On one hand, triboelectric sensors can produce self-generated electrical signals based on the coupling effect of contact electrification and electrostatic induction [16][17][18][19][20][21] , showing superior merits of simple configuration, great manufacturing compatibility, high scalability, no material limitation, and low cost [22][23][24][25][26][27] . On the other hand, printing techniques such as roll-to-roll printing, inkjet printing, and screen printing have been extensively adopted in large-scale device fabrication [28][29][30][31] .…”