期刊
NANO ENERGY
卷 76, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105025
关键词
Self power system; Biomechanical energy harvesting; Duel halbach magnet array; Phase inversion; Hybrid nanogenerator; Multifunctional smart electronics applications
类别
资金
- National Research Foundation of Korea (NRF) - Korea gorvernment (MSIT) [NRF-2020R1A2C2012820]
- Bio & Medical Technology Development Program of the NRF - Korean government (MSIT) [NRF-2017M3A9F1031270]
Biomechanical energy harvesting has been attracting increased attention for powering electronic devices and reducing battery dependency. Here, we report a human-machine interactive hybridized biomechanical nanogenerator (HMI-HBNG) including an electromagnetic generator (EMG) using a Halbach magnet array and an interdigitated electrode-based triboelectric nanogenerator (TENG). The Halbach magnet array enhances the magnetic flux density, increasing the output power of the EMG eightfold. Introducing a nanowire structure in a polytetrafluoroethylene (PTFE) film and incorporating a novel phase inversion technique for microstructure modifications in the nylon/11 film increase the energy harvesting efficiency of the TENG. The performance of the HMI-HBNG is investigated from different perspectives and shows a maximum output power density of 185 W/m(2) across an optimum load resistance of 1.6 k Omega at 5 Hz under 20 m/s(2) acceleration. In a human motion experiment, the HMI-HBNG charges a Li-ion battery (18 mAh) from 0 V to 3 V in approximately 10 s and operates multiple electronics devices simultaneously for 3 min. By using a customized power management circuit, the HMI-HBNG can provide a self-sustainable power source for driving multifunctional smart electronic devices, including Bluetooth computer mice, smartwatches, and smartphones. This work represents significant progress toward a self-powered system and practical power source.
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