Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 45, Issue 12, Pages 18262-18274Publisher
WILEY
DOI: 10.1002/er.7003
Keywords
energy harvesting; environmental monitoring; multidirectional vibration; self-powered sensor; triboelectric nanogenerator
Categories
Funding
- National Research Foundation of Korea (NRF) - Ministry of Education [2018R1A6A1A03025526]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2019R1F1A1061370, NRF-2019R1C1C1005846]
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The study demonstrates a triboelectric nanogenerator with a rationally designed bi-axial vibration responsive magnetic configuration, capable of harvesting multidirectional vibration energy. Further development allows the device to exhibit full (three-dimensional) vibration energy harvesting ability.
Vibration energy, which is ubiquitous but usually abandoned energy, has been considered as a promising source of energy to be harvested for future power supply to electronics. In this study, we demonstrate the triboelectric nanogenerator (TENG) with a rationally designed bi-axial vibration responsive magnetic configuration (BVMC). Oblique placement of two magnets enables the system to be bi-axially sensitive and the superior response of such BVMC to vibrations is explored for further utilized to harvest multidirectional vibration energy in a single device. Energy harvesting performance of the multidirectional vibration stimuli-responsive TENG, called MS-TENG, under various vibration conditions is investigated. In addition, the further development of the MS-TENG with an additional magnet exhibits the full (three-dimensional) vibration energy harvesting ability. The MS-TENG is applied under-the-hood of an automobile where typically abandoned vibrations occur frequently. Turning on the engine on the ignition enables the arrayed MS-TENG to generate a stable output just by engine trembling. Furthermore, the normal human motion-driven vibration is used to charge the commercial capacitor to wirelessly transmit the signal including information of ambient temperature and humidity from the Bluetooth thermo-hygrometer sensor. Consequently, the present TENG with simple but bi-axially sensitive magnetic configuration has a great potential to effectively harvest the multidirectional and low-frequency vibrations around us for future feasible applications.
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