title: Rotating-Disk-Based Hybridized Electromagnetic-Triboelectric Nanogenerator for Sustainably Powering Wireless Traffic Volume Sensors.
abstract: Wireless traffic volume detectors play a critical role for measuring the traffic-flow in a real-time for current Intelligent Traffic System. However, as a battery-operated electronic device, regularly replacing battery remains a great challenge, especially in the remote area and wide distribution. Here, we report a self-powered active wireless traffic volume sensor by using a rotating-disk-based hybridized nanogenerator of triboelectric nanogenerator and electromagnetic generator as the sustainable power source. Operated at a rotating rate of 1000 rpm, the device delivered an output power of 17.5 mW, corresponding to a volume power density of 55.7 W/m(3) (Pd = P/V, see Supporting Information for detailed calculation) at a loading resistance of 700 Ω. The hybridized nanogenerator was demonstrated to effectively harvest energy from wind generated by a moving vehicle through the tunnel. And the delivered power is capable of triggering a counter via a wireless transmitter for real-time monitoring the traffic volume in the tunnel. This study further expands the applications of triboelectric nanogenerators for high-performance ambient mechanical energy harvesting and as sustainable power sources for driving wireless traffic volume sensors.
authors.forename: Binbin
authors.initials: B
authors.lastname: Zhang
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Long
authors.initials: L
authors.lastname: Jin
authors.forename: Weili
authors.initials: W
authors.lastname: Deng
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Haitao
authors.initials: H
authors.lastname: Zhang
authors.forename: Minhao
authors.initials: M
authors.lastname: Zhu
authors.forename: Weiqing
authors.initials: W
authors.lastname: Yang
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.|Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing, China.
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
keywords: hybridized electromagnetic−triboelectric nanogenerator; self-powered wireless sensor