title: Self-Powered Safety Helmet Based on Hybridized Nanogenerator for Emergency.
abstract: The rapid development of Internet of Things and the related sensor technology requires sustainable power sources for their continuous operation. Scavenging and utilizing the ambient environmental energy could be a superior solution. Here, we report a self-powered helmet for emergency, which was powered by the energy converted from ambient mechanical vibration via a hybridized nanogenerator that consists of a triboelectric nanogenerator (TENG) and an electromagnetic generator (EMG). Integrating with transformers and rectifiers, the hybridized nanogenerator can deliver a power density up to 167.22 W/m(3), which was demonstrated to light up 1000 commercial light-emitting diodes (LEDs) instantaneously. By wearing the developed safety helmet, equipped with rationally designed hybridized nanogenerator, the harvested vibration energy from natural human motion is also capable of powering a wireless pedometer for real-time transmitting data reporting to a personal cell phone. Without adding much extra weight to a commercial one, the developed wearing helmet can be a superior sustainable power source for explorers, engineers, mine-workers under well, as well as and disaster-relief workers, especially in remote areas. This work not only presents a significant step toward energy harvesting from human biomechanical movement, but also greatly expands the applicability of TENGs as power sources for self-sustained electronics.
authors.forename: Long
authors.initials: L
authors.lastname: Jin
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: Binbin
authors.initials: B
authors.lastname: Zhang
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: Xi
authors.initials: X
authors.lastname: Huang
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 100083, China.
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
keywords: hybridized nanogenerator; self-powered; vibration; wireless transmission