An inverting TENG to realize the AC mode based on the coupling of triboelectrification and air-breakdown

Shan, Chuncai; Liu, Wenlin; Wang, Zhao; Pu, Xianjie; He, Wencong; Tang, Qian; Fu, Shaoke; Gui, Li; Li, Long; Guo, Hengyu; Sun, Jianfeng; Liu, Anping; Hu, Chenguo

doi:10.1039/d1ee01641e

Cited by 88 publications

(47 citation statements)

References 37 publications

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“…Comparisons of A) energy density with different types of DEGs [ 18–27,32–34 ] and B) charge density with different types of TENGs per cycle. [ 9–16,31,35–39,45 ] …”

Section: Resultsmentioning

confidence: 99%

“… 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%

“…Finally, the maximum charge density of 13 mC m −2 and the maximum energy density of 140 mJ g −1 occur before the dielectric elastomer breakdown (Figure 2C [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] of the DENG under different resistances is also tested. Under the low stretching frequency of 0.8 Hz, a high maximum peak power of 40 mW is obtained at a resistance of 50 MΩ (Figure S11A, Supporting Information).…”

Section: Optimization Of Structural Parametersmentioning

confidence: 99%

“…Figure 3. Comparisons of A) energy density with different types ofDEGs[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]. …”

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confidence: 99%

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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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“…Comparisons of A) energy density with different types of DEGs [ 18–27,32–34 ] and B) charge density with different types of TENGs per cycle. [ 9–16,31,35–39,45 ] …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Optimization Of Structural Parametersmentioning

confidence: 99%

mentioning

confidence: 99%

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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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confidence: 99%

A High‐Performance Bidirectional Direct Current TENG by Triboelectrification of Two Dielectrics and Local Corona Discharge

Shan

et al. 2022

Advanced Energy Materials

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According to the output mode, TENGs can be classified into four categories: i) Mechanical rectification DC TENG (coupling CE and electrostatic induction) [8,9] ; ii) constant DC TENG (Coupling CE and air breakdown) [10,11] ; iii) ordinary AC TENG (coupling CE and electrostatic induction) [12,13] ; iv) inverting AC TENG (Coupling CE with air breakdown). [14] Besides, TENGs can convert ambient mechanical energy from rain, [15,16] wind, [17,18] water flow, [19,20] and body motion [21,22] , etc. into electrical energy at relatively low frequency, so it has superiority to electromagnetic generators in the specific low-frequency mechanical energy harvesting field. [23][24][25] With structure flexibility, TENG can be integrated with other research fields in practical applications, for example, electrocatalysis, [26] biosensing, [27] autoclaving, [28] high-voltage application, [29][30][31][32] artificial intelligence, [3,14] environmental monitoring, [33] which greatly exhibits TENG properties in adjustability, compatibility and high efficiency. [34][35][36][37] The application capability of TENGs is determined by the electric energy output density per cycle, which largely depends on the surface charge density originating from the contact electrification effect. For this reason, many strategies are carried out to boost TENG output charge density, such as vacuum environment, [38] temperature [37] difference, [13] surface modification, [39] and hydrophobic treatment, [40] , etc. Recently, charge excitation methods have achieved a 3.53 mC m −2 output charge density by self-polarization of polar high-k material in charge excitation process. [41] Similarly, the optimal output charge of Miura folding-based TENG has been elevated 4.61 times with the charge excitation strategy. [42] Space-accumulation effect is an effective method for the sliding TENG, which can make 2.3 times improvement compared with the normal sliding TENG in ambient conditions. [43] Nevertheless, the output of TENG based on the coupling of CE and electrostatic induction is still limited by air-breakdown. [35] Solving the problem of air breakdown would be one of the effective ways for TENG to achieve the higher output. After increasing electrodes to 50 units, Wang, et al. achieve an output charge density of 8.80 mC m -2 and an average power density of 0.2 W m -2 for the DC-TENG Triboelectric nanogenerators (TENGs) are regarded as a promising technology to convert ambient low-frequency mechanical energy into electricity for distributed power supply. Although TENGs based on triboelectrification (TE) of metal-dielectric and air breakdown have the advantage of direct current (DC) output, the unidirectional and single-channel output mode limits their energy utilization efficiency. Here, a bidirectional and double-channel (BDC-TENG) based on TE of dielectric-dielectric and local corona discharge is proposed. Different from traditional DC-TENGs, the TE process of the BDC-TENG occurs in two dielectrics, and the double-channel output is generated from simultaneous dis...

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Improving and Quantifying Surface Charge Density via Charge Injection Enabled by Air Breakdown

et al. 2022

Adv Funct Materials

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The modification of triboelectric materials is an important means to improve the output performance of triboelectric nanogenerator (TENG), and the surface charge or ion implantation is an effective way among many modification methods. However, the output enhancement via optimizing triboelectric materials is still limited. Herein, a fast surface charge injection technique based on air breakdown effect is reported, which utilizes an excitation circuit to realize the directional accumulation of charge. Consequently, the output charge density of the Polyimide (PI) film after charge injection reaches 880 µC m -2 , which is the highest of the series of modified triboelectric materials. Moreover, a novel charge transfer mechanism with electrostatic induction competition is proposed, in which significant difference between surface charge density and output charge density is highlighted clearly. Meanwhile, the method of quantifying surface charge density is further given. This work provides a more effective method for the modification of dielectric materials and also offers an important insight towards the charge transfer mechanism in TENG.

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An inverting TENG to realize the AC mode based on the coupling of triboelectrification and air-breakdown

Abstract: An inverting TENG realizes the AC mode based on triboelectrification and air-breakdown by setting alternating polarity distribution areas, and exhibits unique feature in that both the width ratio and amplitude ratio of AC signals can be tuned.

Cited by 88 publications

References 37 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

A High‐Performance Bidirectional Direct Current TENG by Triboelectrification of Two Dielectrics and Local Corona Discharge

Improving and Quantifying Surface Charge Density via Charge Injection Enabled by Air Breakdown

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