期刊
NANO ENERGY
卷 80, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105525
关键词
Triboelectric nanogenerator; Exo-shoe; Gearbox power transmission; High output performance; High specific power
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2019R1C1C1005846]
The study introduces an exo-shoe TENG with a bi-directional gearbox to enhance output performance during daily walking, enabling real-time environmental monitoring and charging of wearable electronics. The technology effectively converts natural stepping motion into high-speed rotation through the gearbox, significantly boosting output performance.
Among various daily human motions, walking is considered the most natural and strongest one. In this study, the exo-shoe TENG (ES-TENG) with the rationally designed bi-directional gearbox is developed to generate extended and enhanced output performance during daily walking. This bi-directional gearbox effectively converts the whole stroke of a reciprocating and low frequency (1 Hz) natural stepping motion into uni-directional high-speed rotation (700 rpm). The proposed ES-TENG exhibits more than ten times enhancement of the output performance with effective motion transformation. Although the normal stepping motion is not interrupted by the ES-TENG, the specific power of the ES-TENG could reach up to 13 mu W/g through a single daily stepping motion. Real-time self-powered environmental monitoring and charging wearable electronics are demonstrated as proof-of-concept applications. Furthermore, the voltage multiplier circuit is used to generate a boosted open-circuit voltage of more than 3 kV, which shows the potential electric treatment applications of the ES-TENG. The ES-TENG provides the potential of biomechanical energy harvesting with a broad range of applications through the generation of highly enhanced output performance under natural daily stepping motions.
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