High performance floating self-excited sliding triboelectric nanogenerator for micro mechanical energy harvesting

Li, Long; Liu, Wenlin; Wang, Zhao; He, Wencong; Gui, Li; Tang, Qian; Guo, Hengyu; Pu, Xianjie; Liu, Yike; Hu, Chenguo

doi:10.1038/s41467-021-25047-y

Cited by 249 publications

(115 citation statements)

References 49 publications

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“… Comparisons of A) energy density with different types of DEGs [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 32 , 33 , 34 ] and B) charge density with different types of TENGs per cycle. [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 31 , 35 , 36 , 37 , 38 , 39 , 45 ] …”

Section: Resultsmentioning

confidence: 99%

High‐Performance Dielectric Elastomer Nanogenerator for Efficient Energy Harvesting and Sensing via Alternative Current Method

Bao

et al. 2022

Advanced Science

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Soft, low‐cost, high‐performance generators are highly desirable for harvesting ambient low frequency mechanical energy. Here, a dielectric elastomer nanogenerator (DENG) is reported, which consists of a dielectric elastomer capacitor, an electret electrostatic voltage source, and a charge pump circuit. Under biaxial stretching, DENG can convert tensile mechanical energy into electrical power without any external power supply. Different from traditional DEG with the charge outward transfer in direct current (DC), the DENG works based on shuttle movement of internal charges in an alternating current (AC). Through alternating current (AC) method, the charge density of the DENG can reach 26 mC m−2 per mechanical cycle, as well as energy density of up to 140 mJ g−1. Due to the all‐solid‐state structure without air gap, the DENG is capable of working stably under different ambient humidity (20 RH%–100 RH%). To demonstrate the applications, a water wave harvester based on the DENG is constructed. The integrated device powers a sensing communication module for self‐powered remote weather monitoring, showing the potential application in ocean wave energy harvesting.

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Section: Resultsmentioning

confidence: 99%

High‐Performance Dielectric Elastomer Nanogenerator for Efficient Energy Harvesting and Sensing via Alternative Current Method

Bao

et al. 2022

Advanced Science

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“…In addition, a Zener diode is connected to the voltage multiplier circuit to avoid the impact of air breakdown on the output stability. Long et al further designed the sliding mode TENG using the self-charge excitation strategy [137].…”

Section: Charge Shuttling/pumpingmentioning

confidence: 99%

Smart Textile Triboelectric Nanogenerators: Prospective Strategies for Improving Electricity Output Performance

Dong

Xiao

Cheng

et al. 2022

Nanoenergy Advances

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By seamlessly integrating the wearing comfortability of textiles with the biomechanical energy harvesting function of a triboelectric nanogenerator (TENG), an emerging and advanced intelligent textile, i.e., smart textile TENG, is developed with remarkable abilities of autonomous power supply and self-powered sensing, which has great development prospects in the next-generation human-oriented wearable electronics. However, due to inadequate interface contact, insufficient electrification of materials, unavoidable air breakdown effect, output capacitance feature, and special textile structure, there are still several bottlenecks in the road towards the practical application of textile TENGs, including low output, high impedance, low integration, poor working durability, and so on. In this review, on the basis of mastering the existing theory of electricity generation mechanism of TENGs, some prospective strategies for improving the mechanical-to-electrical conversion performance of textile TENGs are systematically summarized and comprehensively discussed, including surface/interface physical treatments, atomic-scale chemical modification, structural optimization design, work environmental control, and integrated energy management. The advantages and disadvantages of each approach in output enhancement are further compared at the end of this review. It is hoped that this review can not only provide useful guidance for the research of textile TENGs to select optimization methods but also accelerate their large-scale practical process.

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“…According to increasing the number of current peaks per unit time, i.e., increasing the frequency of charge transfer in external circuit, it enables multiple output and elevates the average power density as well as reducing the current crest factor. Some approaches have been proposed to increase the frequency of electric output signal, including grating electrode, [24,25] radial array electrode, [26,27] multigap structure friction layer, [28] and free oscillation structure such as floating film, [29] spring, [30] and pendulum. [31] However, we still need explore an easy structure with the frequency-multiplication which can convert the low-frequency mechanical triggering to a high-frequency output signal, greatly improving its electric performance, especially increasing average power density and simultaneously decreasing the current crest factor.…”

Section: Introductionmentioning

confidence: 99%

A Tuning‐Fork Triboelectric Nanogenerator with Frequency Multiplication for Efficient Mechanical Energy Harvesting

Liu

Gao

et al. 2022

Small Methods

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As a new technology for high‐entropy energy harvesting, a triboelectric nanogenerator (TENG) has broad applications in sensor networks and internet of things as a power source, but its average power density is limited by the fixed low‐frequency output. Here, a frequency‐multiplication TENG based on intrinsic high frequency of tuning fork is proposed which enables converting low‐frequency mechanical energy into high‐frequency electric energy. A tuning‐fork TENG is used to systematically study the effects of intrinsic frequency, dielectric's thickness, and gap distance on its electric performance, and a total transferred charges of 4.3 µC and an average power density of 9.42 mW m–2 are realized at the triggering frequency of 0.2 Hz, which are 71 times and 5.7 times than that of the single‐cycle output of conventional contact‐separation TENG, respectively. Moreover, the crest factor also decreases from 3.5 to around 1.5. Then, a homemade tuning fork‐like TENG is reasonably designed for harvesting ambient wind energy, achieving an average power density of 20.02 mW m–2 at a wind speed of 7 m s–1. Specially, its impedance resistance is independent of the mechanical triggering frequency, simplifying the back‐end power management circuit design. Therefore, the frequency‐multiplication TENG shows a great potential for efficient distributed energy harvesting.

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High performance floating self-excited sliding triboelectric nanogenerator for micro mechanical energy harvesting

Cited by 249 publications

References 49 publications

High‐Performance Dielectric Elastomer Nanogenerator for Efficient Energy Harvesting and Sensing via Alternative Current Method

High‐Performance Dielectric Elastomer Nanogenerator for Efficient Energy Harvesting and Sensing via Alternative Current Method

Smart Textile Triboelectric Nanogenerators: Prospective Strategies for Improving Electricity Output Performance

A Tuning‐Fork Triboelectric Nanogenerator with Frequency Multiplication for Efficient Mechanical Energy Harvesting

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