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Elastic Multifunctional Liquid–Metal Fibers for Harvesting Mechanical and Electromagnetic Energy and as Self‐Powered Sensors
Author(s) -
Lai YingChih,
Lu HongWei,
Wu HsingMei,
Zhang Dongguang,
Yang Jiayi,
Ma Jinwoo,
Shamsi Mohammad,
Vallem Veena,
Dickey Michael D.
Publication year - 2021
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202100411
Subject(s) - materials science , energy harvesting , electronics , triboelectric effect , wearable technology , contact electrification , electricity , wearable computer , mechanical energy , liquid metal , fiber , composite material , nanotechnology , energy (signal processing) , optoelectronics , electrical engineering , computer science , engineering , power (physics) , statistics , physics , mathematics , quantum mechanics , embedded system
Future wearable technologies and personal electronics may benefit from e‐textiles that simultaneously possess high elasticity and multiple capabilities such as energy harvesting and sensing. Here, the first elastic multifunctional fiber that can scavenge mechanical energy from body motion and electromagnetic energy from surrounding electrical appliances is presented. In addition to converting multiple sources of waste energy into electricity, the fibers can also serve as self‐powered tactile and biomechanical sensors. The fibers consist of hollow elastomeric fibers filled with liquid metal. The fibers harvest energy by the combination of triboelectricity (160 V m −1 , 5 µA m −1 , and ≈ 360 µW m −1 ) and induced electrification of the liquid metal (±8 V m −1 (60 Hz), ±1.4 µA m −1 , and ≈ 8 µW m −1 ). The fibers are characterized and their utility for powering electronics and sensing biomechanical information is demonstrated. These fibers are further demonstrated as completely soft and stretchable components for human–machine interfaces, including keypads and wireless music controllers.