Metallic glass-based triboelectric nanogenerators.
Xin Xia1,2, Ziqing Zhou3, Yinghui Shang3,4
1Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China.
Nature Communications
|February 24, 2023
Summary
Metallic glass enhances triboelectric nanogenerator (TENG) efficiency by over 339%, offering superior wear resistance and humidity tolerance compared to traditional materials. This breakthrough addresses key challenges in TENG technology for improved performance and stability.
Area of Science:
- Materials Science
- Nanotechnology
- Energy Harvesting
Background:
- Surface wear significantly limits the performance and stability of solid/solid interface triboelectric nanogenerators (TENGs).
- Existing solid/liquid interface TENGs show reduced charge generation capability compared to solid/solid interfaces.
- Developing triboelectric interfaces with high charge generation and low wear is a critical challenge.
Purpose of the Study:
- To investigate metallic glass as a novel triboelectric interface for TENGs.
- To enhance triboelectrification efficiency and improve output performance and stability.
- To address the limitations of surface wear and humidity sensitivity in TENGs.
Main Methods:
- Utilizing metallic glass as a triboelectric material in TENG devices.
- Conducting mechanical characterizations to assess friction coefficient and wear resistance.
- Performing electrical characterizations to evaluate triboelectrification efficiency and output performance under various conditions.
- Testing device performance under different humidity levels and gas pressures.
Main Results:
- Metallic glass enhanced triboelectrification efficiency by up to 339.2% compared to copper.
- Metallic glass exhibited a lower friction coefficient and superior wear resistance than copper.
- Devices demonstrated excellent humidity resistance and approached theoretical charge generation limits.
- A peak power density of 15 MW·m⁻² was achieved with metallic glass-based TENGs.
Conclusions:
- Metallic glass is a highly effective material for improving TENG efficiency and durability.
- The unique properties of metallic glass, such as low atomic density and absence of grain boundaries, contribute to enhanced triboelectrification.
- Metallic glass-based TENGs offer a promising solution for humidity- and wear-resistant energy harvesting devices.
