High-performance and robust triboelectric nanogenerators based on optimal microstructured poly(vinyl alcohol) and poly(vinylidene fluoride) polymers for self-powered electronic applications

Patnam, Harishkumarreddy; Dudem, Bhaskar; Graham, Sontyana Adonijah; Yu, Jae Su

doi:10.1016/j.energy.2021.120031

Cited by 48 publications

(19 citation statements)

References 56 publications

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“…The capacitance values at 100 kHz and 1 MHz are ~1.25 nF and ~340 pF, respectively. The decrease in capacitance value with increasing frequency is due to the reduced space charge polarization effect [ 45 ]. Furthermore, the significant increase in the hysteresis window with increasing sweep voltage, as shown in Figure S10 , indicates the increased trapping of charge carriers in the Al 2 O 3 CTL.…”

Section: Resultsmentioning

confidence: 99%

Flexible Layered-Graphene Charge Modulation for Highly Stable Triboelectric Nanogenerator

Sahoo

Lai

et al. 2021

Nanomaterials

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The continuous quest to enhance the output performance of triboelectric nanogenerators (TENGs) based on the surface charge density of the tribolayer has motivated researchers to harvest mechanical energy efficiently. Most of the previous work focused on the enhancement of negative triboelectric charges. The enhancement of charge density over positive tribolayer has been less investigated. In this work, we developed a layer-by-layer assembled multilayer graphene-based TENG to enhance the charge density by creatively introducing a charge trapping layer (CTL) Al2O3 in between the positive triboelectric layer and conducting electrode to construct an attractive flexible TENG. Based on the experimental results, the optimized three layers of graphene TENG (3L-Gr-TENG) with CTL showed a 30-fold enhancement in output power compared to its counterpart, 3L-Gr-TENG without CTL. This remarkably enhanced performance can be ascribed to the synergistic effect between the optimized graphene layers with high dielectric CTL. Moreover, the device exhibited outstanding stability after continuous operation of > 2000 cycles. Additionally, the device was capable of powering 20 green LEDs and sufficient to power an electronic timer with rectifying circuits. This research provides a new insight to improve the charge density of Gr-TENGs as energy harvesters for next-generation flexible electronics.

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Section: Resultsmentioning

confidence: 99%

Flexible Layered-Graphene Charge Modulation for Highly Stable Triboelectric Nanogenerator

Sahoo

Lai

et al. 2021

Nanomaterials

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“…where χ 12 is the interaction parameter, V 1 is the molar volume of the matrix component (PVDF in our case) calculated through the molar mass of the repeating unit (M = 64.03 g/mol) and the amorphous density (ρ = 1.68 g/cm 3 ), in this case, V 1 = 38.1 cm 3 /mol, R is a constant the value of which is 1.987 cal/mol K, T is the temperature chosen to calculate the miscibility (473 K in order to know the miscibility in the molten state), and δ 1 (8.57 (cal/cm 3 ) 1/2 ) and δ 2 (7.9 (cal/cm 3 ) 1/2 ) are the solubility parameters. In our case, the calculated χ 12 is 0.36 at 200 • C. To calculate the segregation strength in the case of block copolymers, the χ 12 value is multiplied by N, the degree of polymerization.…”

Section: Miscibility Between Pm and Pvdfmentioning

confidence: 99%

“…Nowadays, polymers are important materials that may be used to enhance the safety and the quality of the environment and reduce the human impact. For example, they may take relevance in the field of renewable energies or self-powered applications where new polymeric materials can substitute inorganic devices having the same or better yield at a lower cost and with less environmental impact [1][2][3]. Therefore, the current development in new technologies requires the research of new materials to achieve a balance between evolution and pollution.…”

Section: Introductionmentioning

confidence: 99%

Phase Transitions in Poly(vinylidene fluoride)/Polymethylene-Based Diblock Copolymers and Blends

et al. 2021

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The crystallization and morphology of two linear diblock copolymers based on polymethylene (PM) and poly(vinylidene fluoride) (PVDF) with compositions PM23-b-PVDF77 and PM38-b-PVDF62 (where the subscripts indicate the relative compositions in wt%) were compared with blends of neat components with identical compositions. The samples were studied by SAXS (Small Angle X-ray Scattering), WAXS (Wide Angle X-ray Scattering), PLOM (Polarized Light Optical Microscopy), TEM (Transmission Electron Microscopy), DSC (Differential Scanning Calorimetry), BDS (broadband dielectric spectroscopy), and FTIR (Fourier Transform Infrared Spectroscopy). The results showed that the blends are immiscible, while the diblock copolymers are miscible in the melt state (or very weakly segregated). The PVDF component crystallization was studied in detail. It was found that the polymorphic structure of PVDF was a strong function of its environment. The number of polymorphs and their amount depended on whether it was on its own as a homopolymer, as a block component in the diblock copolymers or as an immiscible phase in the blends. The cooling rate in non-isothermal crystallization or the crystallization temperature in isothermal tests also induced different polymorphic compositions in the PVDF crystals. As a result, we were able to produce samples with exclusive ferroelectric phases at specific preparation conditions, while others with mixtures of paraelectric and ferroelectric phases.

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“…In recent years kinetic energy harvesting from the human body and machinery‐induced vibration motion is in extensive research aimed at providing sustainable power for portable wearable electronics, healthcare sensors, IoT's, and self‐powered sensor networks. [ 1–5 ] In kinetic energy harvesting research various transduction principles are practically/theoretically verified and demonstrated such as electromagnetic, [ 6,7 ] piezoelectric, [ 8,9 ] and triboelectric [ 9–26,36,37,42,43,47–61 ] methods. Among these methods, triboelectric nanogenerators (TENG) based on the basic principle of contact electrification and electrostatic induction are contrived as the highly efficient sustainable power alternatives and effective platforms for self‐powered sensing owing to the high voltage feature (at low frequency), low cost, lightweight, wearability, and boundless material choices.…”

Section: Introductionmentioning

confidence: 99%

“…harvesting research various transduction principles are practically/theoretically verified and demonstrated such as electromagnetic, [6,7] piezoelectric, [8,9] and triboelectric [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]36,37,42,43,[47][48][49][50][51][52][53][54][55][56][57][58][59][60][61] methods. Among these methods, triboelectric nanogenerators (TENG) based on the basic principle of contact electrification and electrostatic induction are contrived as the highly efficient sustainable power alternatives and effective platforms for self-powered sensing owing to the high voltage feature (at low frequency), low cost, lightweight, wearability, and boundless material choices.…”

mentioning

confidence: 99%

Siloxene/PVDF Composite Nanofibrous Membrane for High‐Performance Triboelectric Nanogenerator and Self‐Powered Static and Dynamic Pressure Sensing Applications

Bhatta

Sharma

Shrestha

et al. 2022

Adv Funct Materials

101

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Polymer nanofibers are widely adopted in energy harvesting and pressure sensing applications owing to the large contact area and inherent compressibility. Herein, a high-performance triboelectric nanogenerator (TENG) based on 2D siloxene-polyvinylidene fluoride (S-PVDF) composite nanofibrous membrane is newly evaluated. Through proper ratio optimization and facile electrospinning, the fabricated membrane shows significant improvement in dielectric property, electronegativity, and compressibility. The TENG comprising S-PVDF membrane and Nylon 6/6 can deliver an excellent power density of 13.25 W m −2 (f ≈ 5 Hz) and easily operates low-power electronics and Internet of things (IoTs). In addition, the excellent compressibility of membrane extends its applicability to self-powered simultaneous detection of dynamic and static pressure, which is investigated by developing a hybrid pressure sensor (HPS) through effective integration of TENG and a capacitive pressure sensor. The HPS shows an excellent dynamic (12.062 V kPa −1 at (<3 kPa) and 2.58 V kPa −1 at (3-25 kPa)) and static (25.07 mV kPa −1 at (<3 kPa) and 5.96 mV kPa −1 at (3-25 kPa)) pressure sensitivities, respectively. Furthermore, a 2 × 2 HPS array tested and analyzed for multiple users using artificial intelligence significantly improves the accuracy (98%). Remarkable energy harvesting performance and greater accuracy of the HPS manifests better preferences for future self-powered IoT and smart tactile-based user authentication systems.

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High-performance and robust triboelectric nanogenerators based on optimal microstructured poly(vinyl alcohol) and poly(vinylidene fluoride) polymers for self-powered electronic applications

Cited by 48 publications

References 56 publications

Flexible Layered-Graphene Charge Modulation for Highly Stable Triboelectric Nanogenerator

Flexible Layered-Graphene Charge Modulation for Highly Stable Triboelectric Nanogenerator

Phase Transitions in Poly(vinylidene fluoride)/Polymethylene-Based Diblock Copolymers and Blends

Siloxene/PVDF Composite Nanofibrous Membrane for High‐Performance Triboelectric Nanogenerator and Self‐Powered Static and Dynamic Pressure Sensing Applications

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