A strategy to develop highly efficient TENGs through the dielectric constant, internal resistance optimization, and surface modification

Paria, Sarbaranjan; Kumar, Suman; Karan, Sumanta Kumar; Das, Amit Kumar; Maitra, Anirban; Bera, Ranadip; Halder, Lopamudra; Bera, Aswini; De, Amitabha; Khatua, Bhanu Bhusan

doi:10.1039/c8ta11229k

Cited by 91 publications

(52 citation statements)

References 63 publications

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“…Lastly, hybrid modications, which combine physical, chemical, and biological modications, can be utilized to enhance surface charge density, improve the dielectric property of the contact area, and introduce additional bio-functionality into the tTENG devices. This modication methodology is characterized by implementing larger surface areas, increased capability of charge donation or attraction, and extra biological properties using step-by-step [278][279][280][281][282][283][284][285][286] or one-step [287][288][289][290][291][292][293][294][295][296][297] fabrication processes. Since surface enhancements for selected materials are extremely effective at improving output performance, they are widely sought aer and adopted by researchers.…”

Section: Methodsmentioning

confidence: 99%

Textile triboelectric nanogenerators for self-powered biomonitoring

et al. 2021

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Section: Methodsmentioning

confidence: 99%

Textile triboelectric nanogenerators for self-powered biomonitoring

et al. 2021

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“…Figure 4d shows the frequency-dependent dielectric constant measurement of the flat nylon and various nylon/ZnO-CPFs at room temperature. [54,55] The flat nylon polymer film displayed a dielectric constant value of 1.13 at 100 Hz. But, the dielectric constant gradually increased with the increase of ZnO-NFs loaded into the nylon.…”

Section: Figure 3a-d and Figurementioning

confidence: 99%

ZnO Nanoflakes Embedded Polymer Matrix for High‐Performance Mechanical Energy Harvesting

Manchi

Graham

Patnam

et al. 2021

Adv Materials Technologies

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their easy energy conversion ability, ecofriendliness, less weight, easy fabrication, sustainability, and high electrical output. [5,6] Different types of nanogenerators including electromagnetic, triboelectric, pyroelectric, thermoelectric, and piezoelectric nanogenerators have been proposed to harvest these mechanical energies. [6,7] In particular, triboelectric nanogenerator (TENG) is a technology that harvests small-scale mechanical energy and converts it to electricity. [5,8,9] In the year 2012, for the first time, Z. L. Wang and his group proposed TENGs for mechanical energy harvesting. Usually, TENGs operate based on the coupling effects of contact electrification and electrostatic induction. [10][11][12][13][14][15] The TENGs have been also used in various applications, such as portable electronic devices, self-powered sensors, biosensors, healthcare monitoring, etc. [16,17] Unfortunately, the output electrical current of TENGs is still relatively low. Therefore, along with the electrical output enhancement, sustainability, flexibility, cost-effectiveness, and mechanical durability have been further studied by several researchers. [18,19] So far, various techniques have been studied to increase the electrical performance of the TENGs, such as changing surface patterns using plasma treatment, chemical functionalization technique, choosing triboelectric materials, etc. [20][21][22] Also, another promising methodology is to hybridize the TENGs with some other technologies (such as piezoelectric, pyroelectric, and electromagnetic nanogenerators). For example, combining/merging the piezoelectric and triboelectric effects (i.e., synergetic effects) is one of the great methodologies to enhance the electrical performance of the hybridized TENG device. [23][24][25][26] Similarly, combining these two piezoelectric and triboelectric effects can prepare a synergetic active material of hybrid nanogenerator (HNG). [27,28] However, the selection of piezoelectric material consisting of high dielectric constant (k) and large piezoelectric coefficient (d 33 ) is an important factor to enhance the output electricity of nanogenerators. [29,30] Therefore, the piezoelectric material loaded into a triboelectric polymer can be used to enhance the dielectric permittivity and surface charge density of the composite films, which could lead to a strong Nanogenerators have attracted much attention in the past few years due to their high conversion efficiency of mechanical energy into electrical energy that is abundantly available in the environment and everyday human life. Enhancing the electrical output performance of nanogenerator using composite polymeric films (CPFs), i.e., piezoelectric materials embedded in triboelectric polymers, has gained potential interest. The CPFs can provide a high relative permittivity and enhanced surface charge density, resulting in an enhanced electrical output. Herein, piezoelectric zinc oxide (ZnO) nanoflakes (ZnO-NFs) were synthesized by a hydrothermal reaction process and combined with a nylon po...

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“…After adding PA6, PVDF and BaTiO 3 , the increase of C dl and σ indicates that the charge capacity and the charge transfer rate of the cellulose layer increase. Based on strategies to develop efficient TENG through increasing dielectric constant, optimization of internal resistance, and surface modification, the internal resistance of the cellulose friction film changes, and the electrical performance of the friction generator will be improved [34]. Thus it is estimated that the electrical output performance of TENG after assembly also increases.…”

Section: Single Open Circuit Voltage/short Circuit Current Testmentioning

confidence: 99%

“…With rational screening of redox species and comprehensive electrochemical study, a high Seebeck coefficient of −1.8 mV K −1 is achieved by solely exploiting earth-abundant materials based on the thermogalvanic effect. In 2019, the effect of piezoelectricity, internal resistance, and surface treatment on output is explained experimentally and theoretically, which illustrates that the extent of charge transfer has a strong connection with the piezoelectricity, internal resistance, and surface treatment of the composite [34]. However, these polymers are often expensive and contain certain harmful chemicals.…”

Section: Introductionmentioning

confidence: 99%

A Green Triboelectric Nano-Generator Composite of Degradable Cellulose, Piezoelectric Polymers of PVDF/PA6, and Nanoparticles of BaTiO3

Sun

Yang

Liu

et al. 2020

Sensors

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In this paper, a kind of green triboelectric nano-generator based on natural degradable cellulose is proposed. Different kinds of regenerated cellulose composite layers are prepared by a blending doping method, and then assembled with poly(tetrafluoroethylene) (PTFE) thin films to form tribioelectric nanogenerator (TENG). The results show that the open circuit output voltage and the short circuit output current using a pure cellulose membrane is 7.925 V and 1.095 μA. After adding a certain amount of polyamide (PA6)/polyvinylidene fluoride (PVDF)/barium titanate (BaTiO3), the open circuit output voltage peak and the peak short circuit output current increases by 254.43% (to 20.155 V) and 548.04% (to 6.001 μA). The surface morphology, elemental composition and functional group of different cellulose layers are characterized by Scanning Electronic Microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and tested by the electrochemical analyze. Moreover, after multiple assembly and rectification processing, the electrical output performance shows that the peak value of open-circuit output voltage and the peak value of short circuit output current increases by 132.06% and 116.13%. Within 500 s of the charge-discharge test, the single peak charge reached 3.114 V, and the two peak charges reached 3.840 V. The results demonstrate that the nano-generator based on cellulose showed good stability and reliability, and the application and development of natural biomaterials represented by cellulose are greatly promoted in miniature electronic sensing area.

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A strategy to develop highly efficient TENGs through the dielectric constant, internal resistance optimization, and surface modification

Abstract: We have shown an enhancement in the output performance of PDMS/ZnSnO3/MWCNT based TENGs through modification of dielectric constant, internal resistance, and surface patterning.

Cited by 91 publications

References 63 publications

Textile triboelectric nanogenerators for self-powered biomonitoring

Textile triboelectric nanogenerators for self-powered biomonitoring

ZnO Nanoflakes Embedded Polymer Matrix for High‐Performance Mechanical Energy Harvesting

A Green Triboelectric Nano-Generator Composite of Degradable Cellulose, Piezoelectric Polymers of PVDF/PA6, and Nanoparticles of BaTiO3

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