title: A shape-adaptive thin-film-based approach for 50% high-efficiency energy generation through micro-grating sliding electrification.
abstract: Effectively harvesting ambient mechanical energy is the key for realizing self-powered and autonomous electronics, which addresses limitations of batteries and thus has tremendous applications in sensor networks, wireless devices, and wearable/implantable electronics, etc. Here, a thin-film-based micro-grating triboelectric nanogenerator (MG-TENG) is developed for high-efficiency power generation through conversion of mechanical energy. The shape-adaptive MG-TENG relies on sliding electrification between complementary micro-sized arrays of linear grating, which offers a unique and straightforward solution in harnessing energy from relative sliding motion between surfaces. Operating at a sliding velocity of 10 m/s, a MG-TENG of 60 cm(2) in overall area, 0.2 cm(3) in volume and 0.6 g in weight can deliver an average output power of 3 W (power density of 50 mW cm(-2) and 15 W cm(-3)) at an overall conversion efficiency of ∼ 50%, making it a sufficient power supply to regular electronics, such as light bulbs. The scalable and cost-effective MG-TENG is practically applicable in not only harvesting various mechanical motions but also possibly power generation at a large scale.
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China; School of Materials Science an Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
authors.forename: Guang
authors.initials: G
authors.lastname: Zhu
authors.forename: Yu Sheng
authors.initials: YS
authors.lastname: Zhou
authors.forename: Peng
authors.initials: P
authors.lastname: Bai
authors.forename: Xian Song
authors.initials: XS
authors.lastname: Meng
authors.forename: Qingshen
authors.initials: Q
authors.lastname: Jing
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
mesh_terms: D055119:Elastic Modulus; D011211:Electric Power Supplies; D004566:Electrodes; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D017276:Friction; D008422:Materials Testing; D008567:Membranes, Artificial; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D008904:Miniaturization; D009038:Motion; D011138:Polytetrafluoroethylene / Q000737:chemistry*; D014159:Transducers
chemical_list: D008567:Membranes, Artificial; D011138:Polytetrafluoroethylene
keywords: energy conversion; energy generation; self-powered; triboelectric effect