Lightweight, Self-Poled, Flexible Piezoelectric Tungsten Disulfide Quantum Dots-Reinforced PVDF-HFP-Based Nanogenerator

Kashyap, Deepak Kumar; Srivastava, Avanish Kumar; Gupta, Manoj Kumar

doi:10.1021/acsaelm.3c01409

Cited by 4 publications

(1 citation statement)

References 69 publications

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“…The piezoelectric performance of PVDF–HFP mainly comes from the polar β and γ phases, while the α phase does not exhibit this performance. Since the electrically active β phase imparts the highest dipole moment, it shows higher piezoelectric performance . Therefore, enhancing the β phase content in PVDF–HFP films is crucial for improving the performance of TENG.…”

Section: Introductionmentioning

confidence: 99%

Highly Moisture-Resistant Flexible Thin-Film-Based Triboelectric Nanogenerator for Environmental Energy Harvesting and Self-Powered Tactile Sensing

Liu,

Xue,

et al. 2024

ACS Appl. Mater. Interfaces

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Triboelectric nanogenerator (TENG) has been demonstrated as a sustainable energy utilization method for waste mechanical energy and self-powered system. However, the charge dissipation of frictional layer materials in a humid environment severely limits their stable energy supply. In this work, a new method is reported for preparing polymer film as a hydrophobic negative friction material by solution blending poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF−HFP) and polyvinyl chloride (PVC), doping with titanium dioxide (TiO 2 ) nanoparticles, and further surface patterning modification. The P-TENG composed of the PVDF−HFP/PVC/TiO 2 composite film with optimized hydrophobic performance (WCA = 124°) achieved an output voltage of 235 V and a short-circuit current of 35 μA, which is approximately three times that of the bare PVDF−HFP-based TENG. Under charge excitation, the transferred charge of the P-TENG can reach 35 nC. When the external load resistance is 5.5 MΩ, the output peak power density can reach 1.4 W m −2 . Meanwhile, the hydrophobic surface layer with a rough surface structure enables the device to overcome the influence of water molecules on charge transfer in a humid environment, quickly recover, and maintain a high output. The P-TENG can effectively monitor finger flexibility and strength and realize real-time evaluation of the exercise state and hand fatigue of the elderly and rehabilitation trainers. It has broad application prospects in self-powered intelligent motion sensing, soft robotics, human− machine interaction, and other fields.

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Section: Introductionmentioning

confidence: 99%

Highly Moisture-Resistant Flexible Thin-Film-Based Triboelectric Nanogenerator for Environmental Energy Harvesting and Self-Powered Tactile Sensing

Liu,

Xue,

et al. 2024

ACS Appl. Mater. Interfaces

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High sensitivity flexible piezoelectric nanogenerator based on multi‐layer piezoelectric composite fiber for human motion energy harvesting

Xue,

Huang,

Zhang

et al. 2024

J of Applied Polymer Sci

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In this study, a piezoelectric nanogenerator (PENG) based on multilayer composite fiber had good and stable piezoelectric output performance, which could realize biomechanical energy collection and human movement monitoring. The polyvinylidene fluoride‐hexafluoryl propylene (P(VDF‐HFP)) composite fiber doped with MXene was used as a promising piezoelectric functional layer (MPFP). By electrospinning, P(VDF‐HFP) composite fiber was constructed by alternating electrospinning with polyurethane (TPU) nanofibers layer by layer. The adoption of MXene as a functional filler promoted the transformation of P(VDF‐HFP) from α to piezoelectric β‐crystal, the piezoelectric β‐crystal content of P(VDF‐HFP) increased, and the dielectric properties and polarization levels were enhanced. At the same time, the multi‐layer structure design improved the piezoelectric sensitivity and mechanical properties of the composite fiber, and the composite fiber was more flexible and had longer tensile strain. With excellent dielectric and mechanical properties, 3MPFP/TPU/3MPFP/TPU multilayer composite fibers showed piezoelectric sensitivity of 10.88 V/kPa. Under the action of palm pressing, the PENG generated an open circuit voltage of 25 V, and the voltage signal of the device under different motion forms had specific characteristics such as peak value, frequency, and shape, which could be used to realize the analysis of human motion forms. This study provided an efficient, simple, and creative new idea for the application of flexible energy storage electronic devices, PENGs, and piezoelectric sensors.

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Piezoresistive/Piezoelectric Pressure Sensor Based on CVD-Grown ZnO Nanowires on Polyethylene Terephthalate Substrate

Kumari,

Prasad,

Singh

et al. 2024

ACS Appl. Electron. Mater.

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Recent developments in the domain of electronic materials and devices have attracted the interest of researchers toward flexible and printable electronic components like organic transistors, printable electrodes, and sensors. Zinc oxide (ZnO) nanowires (NWs) possess several excellent properties like high mobility, large exciton binding energy, and direct-band gap in addition to large piezoelectric coefficients. Here, we report a flexible piezo-resistive/piezoelectric sensor based on ZnO NWs on an indium tin oxide (ITO)-coated polyethylene terephthalate (PET) substrate. The device exhibits variation in resistance from 100 to 2400 Ω during relaxation and bending conditions, respectively. The I–V curves of the ZnO NW-based flexible pressure sensor show a transition in current conduction from 24.40 mA to 0.30 μA upon bending (to 95.5°) from flat at +5 V. We observed 10-fold enhanced variation as compared to previous reports. Improved sensitivity has been observed in our experiments due to fewer defects in CVD-grown NWs as compared with others where hydrothermally grown nanowires were used. The device fabrication methodology reported in this article requires less time and enables efficient devices to realize flexible and wearable technology.

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Lightweight, Self-Poled, Flexible Piezoelectric Tungsten Disulfide Quantum Dots-Reinforced PVDF-HFP-Based Nanogenerator

Cited by 4 publications

References 69 publications

Highly Moisture-Resistant Flexible Thin-Film-Based Triboelectric Nanogenerator for Environmental Energy Harvesting and Self-Powered Tactile Sensing

Highly Moisture-Resistant Flexible Thin-Film-Based Triboelectric Nanogenerator for Environmental Energy Harvesting and Self-Powered Tactile Sensing

High sensitivity flexible piezoelectric nanogenerator based on multi‐layer piezoelectric composite fiber for human motion energy harvesting

Piezoresistive/Piezoelectric Pressure Sensor Based on CVD-Grown ZnO Nanowires on Polyethylene Terephthalate Substrate

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