Metallic glass-based triboelectric nanogenerators

Xin Xia, Ziqing Zhou, Yinghui Shang, Yong Yang () and Yunlong Zi ()
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Xin Xia: The Chinese University of Hong Kong, Shatin, N.T.
Ziqing Zhou: City University of Hong Kong, Kowloon Tong
Yinghui Shang: City University of Hong Kong, Kowloon Tong
Yong Yang: City University of Hong Kong, Kowloon Tong
Yunlong Zi: The Chinese University of Hong Kong, Shatin, N.T.

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Surface wear is a major hindrance in the solid/solid interface of triboelectric nanogenerators (TENG), severely affecting their output performance and stability. To reduce the mechanical input and surface wear, solid/liquid-interface alternatives have been investigated; however, charge generation capability is still lower than that in previously reported solid/solid-interface TENGs. Thus, achieving triboelectric interface with high surface charge generation capability and low surface wear remains a technological challenge. Here, we employ metallic glass as one triboelectric interface and show it can enhance the triboelectrification efficiency by up to 339.2%, with improved output performance. Through mechanical and electrical characterizations, we show that metallic glass presents a lower friction coefficient and better wear resistance, as compared with copper. Attributed to their low atomic density and the absence of grain boundaries, all samples show a higher triboelectrification efficiency than copper. Additionally, the devices demonstrate excellent humidity resistance. Under different gas pressures, we also show that metallic glass-based triboelectric nanogenerators can approach the theoretical limit of charge generation, exceeding that of Cu-based TENG by 35.2%. A peak power density of 15 MW·m-2 is achieved. In short, this work demonstrates a humidity- and wear-resistant metallic glass-based TENG with high triboelectrification efficiency.

Date: 2023
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DOI: 10.1038/s41467-023-36675-x

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