Achieving ultrahigh instantaneous power density of 10\u2009MW/m2 by leveraging the opposite-charge-enhanced transistor-like triboelectric nanogenerator (OCT-TENG)

Hao Wu,Zuankai Wang,Yunlong Zi,Steven Wang

doi:10.1038/s41467-021-25753-7

Hao Wu, Zuankai Wang + Show 2 more

Open Access

https://doi.org/10.1038/s41467-021-25753-7

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Journal: Nature Communications	Publication Date: Sep 15, 2021
Citations: 132	License type: open-access

Affiliation: City University of Hong Kong

Abstract

Converting various types of ambient mechanical energy into electricity, triboelectric nanogenerator (TENG) has attracted worldwide attention. Despite its ability to reach high open-circuit voltage up to thousands of volts, the power output of TENG is usually meager due to the high output impedance and low charge transfer. Here, leveraging the opposite-charge-enhancement effect and the transistor-like device design, we circumvent these limitations and develop a TENG that is capable of delivering instantaneous power density over 10 MW/m2 at a low frequency of ~ 1 Hz, far beyond that of the previous reports. With such high-power output, 180 W commercial lamps can be lighted by a TENG device. A vehicle bulb containing LEDs rated 30 W is also wirelessly powered and able to illuminate objects further than 0.9 meters away. Our results not only set a record of the high-power output of TENG but also pave the avenues for using TENG to power the broad practical electrical appliances.

Highlights

Converting various types of ambient mechanical energy into electricity, triboelectric nanogenerator (TENG) has attracted worldwide attention
TENG suffers from two fundamental limitations: the low charge transfer[13,14,15,16] (~100 μC/m2) and the high output impedance[13,17], which result in low output power
We develop an opposite-charge-enhanced transistor-like TENG (OCT-TENG) that is capable of delivering ultrahigh instantaneous power density over 10 MW/m2

Summary

Introduction

Converting various types of ambient mechanical energy into electricity, triboelectric nanogenerator (TENG) has attracted worldwide attention. Leveraging the opposite-chargeenhancement effect and the transistor-like device design, we circumvent these limitations and develop a TENG that is capable of delivering instantaneous power density over 10 MW/ m2 at a low frequency of ~ 1 Hz, far beyond that of the previous reports. With such highpower output, 180 W commercial lamps can be lighted by a TENG device. We develop an opposite-charge-enhanced transistor-like TENG (OCT-TENG) that is capable of delivering ultrahigh instantaneous power density over 10 MW/m2. Surpassing the previous reports using mW-level LEDs for demonstrating the TENG’s performance, our results have paved the avenues for using TENG to power the broad practical applications

Methods

Results

Conclusion