Wireless Power Transmission Enabled by a Triboelectric Nanogenerator via a Magnetic Interaction

Abstract

Non‐contact wireless power transmission is considered as an ideal energy supply technology due to its convenience and safety. Herein, a subtle triboelectric nanogenerator (TENG)–based non‐contact wireless energy transmission technique is invented via a dynamic magnetic field media. The electricity is first converted into the magnet's vibration. Through the interaction between a pair of magnets, TENG can then wirelessly receive the vibrational energy driven by an electrically induced magnetic field variation. The working principle and output performance of the designed device are explored by simulations and a series of demonstrations, respectively. By inserting different plates in the magnetic field and adjusting the configuration, the TENG exhibits excellent anti‐interference and desirable output performance, indicating that the energy conversion unit exhibits advantages of high efficiency and adaptability. A superior transmission and output performance of 1.5 μW can be achieved under low frequency and relatively large separation distance, at a load resistance of 80 MΩ. TENGs, which enable wireless energy transmission via magnetic field that can easily light up 12 light‐emitting diode (LED) bulbs and drive an electronic watch, provide a promising and feasible approach to energy conversion and energy supply and serve as an alternative power source for driving portable electronics.

Recent Advances in Human Motion Excited Energy Harvesting Systems for Wearables

“…In contrast, the smart material‐based energy harvesters are easily integrated with a specific sensor to realize self‐powered applications. [ 133,135 ] Furthermore, with the development of low power sensors and electronics, more self‐powered applications can be realized by the embedded energy harvesters. [ 136,137 ]…”

“…As an example, Cao et al utilized a TENG to simultaneously sense the human motion and produce electricity, which can be worn on human limbs to detect various motions. [ 133 ]…”

Increasing the robustness of electrodynamic wireless power receivers with hybrid transduction

“…In the state of the art, piezoelectric transducers (PE), electrodynamic transducers (ED) or triboelectric transducer (TE) are primarily used [2]- [4]. PE have a high power density, the ability to tune their resonant frequency but they often suffer from ageing since they are made of brittle material.…”

An In‐Plane Sliding Triboelectric Nanogenerator with a Multielectrode Array for Self‐Powered Dynamic Addressing and Trajectory Tracking

“…Based on triboelectrification and electrostatic induction, triboelectric nanogenerators (TENGs) have been developed to provide numerous available solutions to difficulty of power supply in large‐scale sensor networks . Triboelectric charges can induce electrostatic potentials or currents triggered by a conventional mechanical motion, which can be acquired as analog signals from TENG‐based sensors . Due to their low cost and high reliability in converting sliding mechanical energy into electrical signals without power consumption, the sliding TENGs, respected as a milestone, have been successfully applied in various fields, medical care, environmental monitoring, and homeland security …”