title: Hybridized Electromagnetic-Triboelectric Nanogenerator for a Self-Powered Electronic Watch.
abstract: We report a hybridized nanogenerator including a triboelectric nanogenerator (TENG) and six electromagnetic generators (EMGs) that can effectively scavenge biomechanical energy for sustainably powering an electronic watch. Triggered by the natural motions of the wearer's wrist, a magnetic ball at the center in an acrylic box with coils on each side will collide with the walls, resulting in outputs from both the EMGs and the TENG. By using the hybridized nanogenerator to harvest the biomechanical energy, the electronic watch can be continuously powered under different motion types of the wearer's wrist, where the best approach is to charge a 100 μF capacitor in 39 s to maintain the continuous operation of the watch for 456 s. To increase the working time of the watch further, a homemade Li-ion battery has been utilized as the energy storage unit for realizing the continuous working of the watch for about 218 min by using the hybridized nanogenerator to charge the battery within 32 min. This work will provide the opportunities for developing a nanogenerator-based built-in power source for self-powered wearable electronics such as an electronic watch.
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing 100083, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Quan
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing 100083, China.
authors.forename: Xue
authors.initials: X
authors.lastname: Wang
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing 100083, China.|School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332-0245, United States.
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing 100083, China.
authors.forename: Ya
authors.initials: Y
authors.lastname: Yang
mesh_terms: D011211:Electric Power Supplies; D055590:Electromagnetic Phenomena; D004867:Equipment Design; D017276:Friction; D006801:Humans; D036103:Nanotechnology / Q000295:instrumentation*
keywords: electromagnetic; electronic watch; hybridized; self-powered; triboelectric