A comprehensive study of non-linear air damping and “pull-in” effects on the electrostatic energy harvesters

Guo, Xinzhuan; Zhang, Yulong; Fan, Kangqi; Lee, Chengkuo; Wang, Fei

doi:10.1016/j.enconman.2019.112264

Cited by 114 publications

(30 citation statements)

References 38 publications

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“…The electrostatic energy harvester with a spray-coated electret shows excellent performance compared with previously published devices. A plateau can be seen in the RMS power output at an RMS acceleration above 26.5 m/s 2 , where collision begins to occur 50 . The output power of the device driven by random vibration signals is also tested, as depicted in the Supplementary Information (Fig.…”

Section: Energy Harvesting Device With a Spray-coated Electret And Mementioning

confidence: 98%

“…The top plate is designed with a proof mass suspended by four beams, which will vibrate when driven by ambient vibration. Five stoppers are designed on the proof mass to prevent the "pull-in" effect during vibration 50 . The bottom plate is mainly constructed with a cavity, which limits the maximum amplitude of the device.…”

Section: Energy Harvesting Device With a Spray-coated Electret And Mementioning

confidence: 99%

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Spray-coated electret materials with enhanced stability in a harsh environment for an MEMS energy harvesting device

Luo

Zhang

et al. 2021

Microsyst Nanoeng

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The charge stability of electret materials can directly affect the performance of electret-based devices such as electrostatic energy harvesters. In this paper, a spray-coating method is developed to deposit an electret layer with enhanced charge stability. The long-term stability of a spray-coated electret is investigated for 500 days and shows more stable performance than a spin-coated layer. A second-order linear model that includes both the surface charge and space charge is proposed to analyze the charge decay process of electrets in harsh environments at a high temperature (120 °C) and high humidity (99% RH); this model provides better accuracy than the traditional deep-trap model. To further verify the stability of the spray-coated electret, an electrostatic energy harvester is designed and fabricated with MEMS (micro-electromechanical systems) technology. The electret material can work as both the bonding interface and electret layer during fabrication. A maximum output power of 11.72 μW is harvested from a vibrating source at an acceleration of 28.5 m/s2. When the energy harvester with the spray-coated electret is exposed to a harsh environment (100 °C and 98% RH), an adequate amount of power can still be harvested even after 34 h and 48 h, respectively.

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Section: Energy Harvesting Device With a Spray-coated Electret And Mementioning

confidence: 98%

Section: Energy Harvesting Device With a Spray-coated Electret And Mementioning

confidence: 99%

Spray-coated electret materials with enhanced stability in a harsh environment for an MEMS energy harvesting device

Luo

Zhang

et al. 2021

Microsyst Nanoeng

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“…Here, the piezoelectric material is strained, and further, energy from vibrations, pressure, and force is converted to electrical energy. The electrostatic energy harvesting mechanism [25] utilized the principle in which energy conversion occurs from mechanical to electrical with the capacitance change. Here, the key factor is changing the capacitance of a varying capacitor which is depending on the vibrations.…”

Section: Energy Harvesting Techniques With Corresponding Sources Of Energymentioning

confidence: 99%

Green Communication for Next‐Generation Wireless Systems: Optimization Strategies, Challenges, Solutions, and Future Aspects

Rathore

Sangwan

Kaiwartya

et al. 2021

Wireless Communications and Mobile Computing

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Wireless sensor networks (WSNs) have emerged as a backbone technology for the wireless communication era. The demand for WSN is rapidly increasing due to their major role in various applications with a wider deployment and omnipresent nature. The WSN is rapidly integrated into a large number of applications such as industrial, security, monitoring, tracking, and applications in home automation. The widespread use in many different areas attracts research interest in WSNs. Therefore, researchers are taking initiatives in exploring innovation day by day particularly towards the Internet of Things (IoT). But, WSN is having lots of challenging issues that need to be addressed, and the inherent characteristics of WSN severely affect the performance. Energy constraints are one of the primary issues that require urgent attention from the research community. Optimal energy optimization strategies are needed to counter the issue of energy constraints. Although one of the most appropriate schemes for handling energy constraints issues is the appropriate energy harvesting technique, the optimal energy optimization strategies should be coupled together for effectively utilizing the harvested energy. In this high-level systematic and taxonomical survey, we have organized the energy optimization strategies for EH-WSNs into eleven factors, namely, radio optimization schemes, optimizing the energy harvesting process, data reduction schemes, schemes based on cross-layer optimization, schemes based on cross-layer optimization, sleep/wake-up policies, schemes based on load balancing, schemes based on optimization of power requirement, optimization of communication mechanism, schemes based on optimization of battery operations, mobility-based schemes, and finally energy balancing schemes. We have also prepared the summarized view of various protocols/algorithms with their remarkable details. This systematic and taxonomy survey also provides a progressive detailed overview and classification of various optimization challenges for the EH-WSNs that require attention from the researcher followed by a survey of corresponding solutions for corresponding optimization issues. Further, this systematic and taxonomical survey also provides a deep analysis of various emerging energy harvesting technologies in the last twenty years of the era.

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“…There are four major transduction mechanisms for converting mechanical energy into electrical energy, namely piezoelectric [11][12][13], electromagnetic/magnetostrictive [14][15][16][17][18][19], electrostatic [20][21][22][23] and triboelectric [24][25][26][27][28][29][30]. Triboelectric nanogenerators (TENGs) were first proposed by Professor Zhonglin Wang's group in 2012.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Honeycomb-Structured Electret/Triboelectric Nanogenerator for Biomechanical and Morphing Wing Energy Harvesting

Tao

Chen

et al. 2021

Nano-Micro Lett.

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Flexible, compact, lightweight and sustainable power sources are indispensable for modern wearable and personal electronics and small-unmanned aerial vehicles (UAVs). Hierarchical honeycomb has the unique merits of compact mesostructures, excellent energy absorption properties and considerable weight to strength ratios. Herein, a honeycomb-inspired triboelectric nanogenerator (h-TENG) is proposed for biomechanical and UAV morphing wing energy harvesting based on contact triboelectrification wavy surface of cellular honeycomb structure. The wavy surface comprises a multilayered thin film structure (combining polyethylene terephthalate, silver nanowires and fluorinated ethylene propylene) fabricated through high-temperature thermoplastic molding and wafer-level bonding process. With superior synchronization of large amounts of energy generation units with honeycomb cells, the manufactured h-TENG prototype produces the maximum instantaneous open-circuit voltage, short-circuit current and output power of 1207 V, 68.5 μA and 12.4 mW, respectively, corresponding to a remarkable peak power density of 0.275 mW cm−3 (or 2.48 mW g−1) under hand pressing excitations. Attributed to the excellent elastic property of self-rebounding honeycomb structure, the flexible and transparent h-TENG can be easily pressed, bent and integrated into shoes for real-time insole plantar pressure mapping. The lightweight and compact h-TENG is further installed into a morphing wing of small UAVs for efficiently converting the flapping energy of ailerons into electricity for the first time. This research demonstrates this new conceptualizing single h-TENG device's versatility and viability for broad-range real-world application scenarios.

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A comprehensive study of non-linear air damping and “pull-in” effects on the electrostatic energy harvesters

Cited by 114 publications

References 38 publications

Spray-coated electret materials with enhanced stability in a harsh environment for an MEMS energy harvesting device

Spray-coated electret materials with enhanced stability in a harsh environment for an MEMS energy harvesting device

Green Communication for Next‐Generation Wireless Systems: Optimization Strategies, Challenges, Solutions, and Future Aspects

Hierarchical Honeycomb-Structured Electret/Triboelectric Nanogenerator for Biomechanical and Morphing Wing Energy Harvesting

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