Enhanced Kevlar-based triboelectric nanogenerator with anti-impact and sensing performance towards wireless alarm system. (January 2022)

• Record Type: Journal Article
• Authors: Wang, Wenhui; Zhou, Jianyu; Wang, Sheng; Yuan, Fang; Liu, Shuai; Zhang, Junshuo; Gong, Xinglong
• Is Part Of: Nano energy. Volume 91(2022)
• Publication Date: 2022-01
• Subjects: Triboelectric nanogenerator -- Kevlar -- Shear thickening composite -- Wearable electronics -- Bluetooth transmission; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2021.106657
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: An enhanced Kevlar-based triboelectric nanogenerator (EK-TENG) with excellent safeguarding and stable sensing capability in harsh loading environments was developed by integrating shear thickening materials and graphene on Kevlar fabric. EK-TENG, whose maximum peak power density reached as high as 25.8 mW/m 2 under oscillator loadings of 40 N and 10 Hz, could directly power commercial LEDs, capacitors and supercapacitors. In addition, the 30-layer EK-TENG with the greatest fiber friction dissipated drop hammer impact force from 1820 N to 439 N under low-speed impact. EK-TENG with anti-ballistic property enabled to resist 126.6 m/s bullet shooting which was higher than 90.1 m/s of neat Kevlar. Besides, EK-TENG effectively absorbed and dissipated 87.4% of the explosion wave energy under blast loading which exhibited excellent safeguarding properties. Furthermore, EK-TENG could generate voltage signals under various impact loadings which could act as self-powered sensor to monitor external stimuli. Finally, a smart TENG-based wireless passive sensor alarm system with high sensitivity was designed to monitor and warn impact dangers, which opened up a new avenue for the development of next generation intelligent protective clothing. Graphical Abstract: ga1 Highlights: A wearable EK-TENG exhibited excellent anti-impact and self-powered sensing. EK-TENG directly powered electronics and stably detected external impacts. Ballistic limit velocity of EK-TENG was increased by 40.5% compared with Kevlar. EK-TENG dissipated 87.4% of the explosion wave pressure under blast loading. An intelligent TENG-based wireless passive sensor alarm was designed.