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Harvesting Ambient Vibration Energy over a Wide Frequency Range for Self-Powered Electronics

By Xiaofeng Wang (119575), Simiao Niu (1632232), Fang Yi (1835125), Yajiang Yin (3643597), Chenglong Hao (3459986), Keren Dai (3643600), Yue Zhang (30585), Zheng You (2593090) and Zhong Lin Wang (1273431)


Vibration is one of the most common energy sources in ambient environment. Harvesting vibration energy is a promising route to sustainably drive small electronics. This work introduces an approach to scavenge vibrational energy over a wide frequency range as an exclusive power source for continuous operation of electronics. An elastic multiunit triboelectric nanogenerator (TENG) is rationally designed to efficiently harvest low-frequency vibration energy, which can provide a maximum instantaneous output power density of 102 W·m<sup>–3</sup> at as low as 7 Hz and maintain its stable current outputs from 5 to 25 Hz. A self-charging power unit (SCPU) combining the TENG and a 10 mF supercapacitor gives a continuous direct current (DC) power delivery of 1.14 mW at a power management efficiency of 45.6% at 20 Hz. The performance of the SCPU can be further enhanced by a specially designed power management circuit, with a continuous DC power of 2 mW and power management efficiency of 60% at 7 Hz. Electronics such as a thermometer, hygrometer, and speedometer can be sustainably powered solely by the harvested vibration energy from a machine or riding bicycle. This approach has potential applications in self-powered systems for environment monitoring, machine safety, and transportation

Topics: Biotechnology, Ecology, Space Science, Astronomical and Space Sciences not elsewhere classified, Mathematical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, power management circuit, 7 Hz, Wide Frequency Range, TENG, Harvesting vibration energy, power management efficiency, output power density, electronic, multiunit triboelectric nanogenerator, Harvesting Ambient Vibration Energy, vibration energy, Self-Powered Electronics Vibration, self-charging power unit, scavenge vibrational energy, DC, 10 mF supercapacitor, SCPU
Year: 2017
DOI identifier: 10.1021/acsnano.6b07633.s006
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Provided by: FigShare
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