An Energy Harvester Coupled with a Triboelectric Mechanism and Electrostatic Mechanism for Biomechanical Energy Harvesting

Zhai, Lei; Gao, Lingxiao; Wang, Ziying; Dai, Kejie; Wu, Shuai; Mu, Xiaojing

doi:10.3390/nano12060933

Cited by 14 publications

(7 citation statements)

References 33 publications

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“…Energy harvesters that convert mechanical energy into electrical energy are predominantly divided into three categories according to the principle: electromagnetic, piezoelectric, and electrostatic [ 22 , 23 ]. Among them, the electromagnetic energy harvesters are large in size and high in cost, and the piezoelectric energy harvesters can only be effective under high-frequency vibrations [ 24 , 25 ]. As an emerging energy harvesting technology, TENG utilizes triboelectric electrification and electrostatic induction to convert mechanical energy into electrical energy.…”

Section: Introductionmentioning

confidence: 99%

Solid-Liquid Triboelectric Nanogenerator Based on Vortex-Induced Resonance

Zhang

et al. 2023

Nanomaterials

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Energy converters based on vortex-induced vibrations (VIV) have shown great potential for harvesting energy from low-velocity flows, which constitute a significant portion of ocean energy. However, solid-solid triboelectric nanogenerators (TENG) are not wear-resistant in corrosive environments. Therefore, to effectively harvest ocean energy over the long term, a novel solid-liquid triboelectric nanogenerator based on vortex-induced resonance (VIV-SL-TENG) is presented. The energy is harvested through the resonance between VIV of a cylinder and the relative motions of solid-liquid friction pairs inside the cylinder. The factors that affect the output performance of the system, including the liquid mass ratio and the deflection angle of the friction plates, are studied and optimized by establishing mathematical models and conducting computational fluid dynamics simulations. Furthermore, an experimental platform for the VIV-SL-TENG system is constructed to test and validate the performance of the harvester under different conditions. The experiments demonstrate that the energy harvester can successfully convert VIV energy into electrical energy and reach maximum output voltage in the resonance state. As a new type of energy harvester, the presented design shows a promising potential in the field of ‘blue energy’ harvesting.

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Section: Introductionmentioning

confidence: 99%

Solid-Liquid Triboelectric Nanogenerator Based on Vortex-Induced Resonance

Zhang

et al. 2023

Nanomaterials

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“…At present, there are four main ways to convert vibration energy into electrical energy: the electrostatic method [ 20 ], a friction motor [ 21 , 22 , 23 ], electromagnetic method [ 24 , 25 , 26 ], and piezoelectric method [ 27 , 28 , 29 ]. Fang et al [ 30 ] drew inspiration from bird motion and designed an isolation system for capturing broadband vibrations and harvesting energy from spacecraft.…”

Section: Introductionmentioning

confidence: 99%

Quasi-Zero Stiffness Vibration Sensing and Energy Harvesting Integration Based on Buckled Piezoelectric Euler Beam

Tuo,

Xu,

et al. 2023

Sensors

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This paper presents a novel quasi-zero stiffness vibration sensing and energy harvesting integration system for absolute displacement measurements based on a buckled piezoelectric Euler beam (BPEB) with quasi-zero stiffness (QZS) characteristics. On one hand, BPEB provides negative stiffness to the system, thus creating a vibration-free point within the system and transforming the absolute displacement measurement problem into a relative motion sensing problem. On the other hand, during the measurement process, the BPEB collects the vibration energy from the system, which can provide electrical energy for low-power relative motion sensing devices and remarkably suppress the frequency range of the jump phenomenon, thereby further expanding the frequency domain measurement range of the sensing system. The research results have shown that this system can measure the absolute motion signal of the tested object in low-frequency vibration with small excitation. By adjusting parameters such as the force–electric coupling coefficient and damping ratio, the measurement accuracy of the sensing system can be improved. Furthermore, the system can convert the mechanical energy of vibrations into electrical energy to power the surrounding low-power sensors or provide partial power. This could potentially achieve self-powering integrated quasi-zero stiffness vibration sensing, offering another approach and possibility for the automation development in wireless sensing systems and the Internet of Things field.

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“…The collection of energy from the environment and its conversion into electrical energy for use in electronic devices has been the subject of much research to meet the power requirements of these devices [ 6 ]. Energy harvesting technologies involve conversion mechanisms such as electromagnetic [ 7 , 8 ], triboelectric [ 9 , 10 ], electrostatic [ 11 , 12 ], magnetostrictive [ 13 , 14 ], thermoelectric [ 15 , 16 ], piezoelectric [ 17 , 18 ] and photovoltaic [ 19 , 20 ]. Energy harvesters typically use one or more conversion mechanisms to convert energy from nature: tides, vibrations, air currents, heat, etc., into electrical energy.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Airflow Energy Harvester Based on the New Diamagnetic Levitation Structure

et al. 2023

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This paper presents an improved solution for the airflow energy harvester based on the push–pull diamagnetic levitation structure. A four-notch rotor is adopted to eliminate the offset of the floating rotor and substantially increase the energy conversion rate. The new rotor is a centrally symmetrical-shaped magnet, which ensures that it is not subjected to cyclically varying unbalanced radial forces, thus avoiding the rotor’s offset. Considering the output voltage and power of several types of rotors, the four-notch rotor was found to be optimal. Furthermore, with the four-notch rotor, the overall average increase in axial magnetic spring stiffness is 9.666% and the average increase in maximum monostable levitation space is 1.67%, but the horizontal recovery force is reduced by 3.97%. The experimental results show that at an airflow rate of 3000 sccm, the peak voltage and rotation speed of the four-notch rotor are 2.709 V and 21,367 rpm, respectively, which are 40.80% and 5.99% higher compared to the three-notch rotor. The experimental results were consistent with the analytical simulation. Based on the improvement, the energy conversion factor of the airflow energy harvester increased to 0.127 mV/rpm, the output power increased to 138.47 mW and the energy conversion rate increased to 58.14%, while the trend of the levitation characteristics also matched the simulation results. In summary, the solution proposed in this paper significantly improves the performance of the airflow energy harvester.

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An Energy Harvester Coupled with a Triboelectric Mechanism and Electrostatic Mechanism for Biomechanical Energy Harvesting

Cited by 14 publications

References 33 publications

Solid-Liquid Triboelectric Nanogenerator Based on Vortex-Induced Resonance

Solid-Liquid Triboelectric Nanogenerator Based on Vortex-Induced Resonance

Quasi-Zero Stiffness Vibration Sensing and Energy Harvesting Integration Based on Buckled Piezoelectric Euler Beam

Improvement of the Airflow Energy Harvester Based on the New Diamagnetic Levitation Structure

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