The mechanism of a PVDF/CsPbBr<sub>3</sub> perovskite composite fiber as a self-polarization piezoelectric nanogenerator with ultra-high output voltage

Xue, Yuncan; Yang, Tao; Zheng, Yapeng; Wang, Enhui; Wang, Hongyang; Zhu, Laipan; Du, Zhentao; Hou, Xinmei; Chou, Kuo‐Chih

doi:10.1039/d2ta03559f

Cited by 67 publications

(19 citation statements)

References 57 publications

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“…As illustrated in Figure , pure PVDF is predominated by the α‐phase, hence electrical poling under a high external electrical field is necessary to orient the dipoles. [ 70 ] Unfortunately, depolarization takes place as soon as the electric field is turned off or gradual depolarization happens by the relaxation of the dipoles. On the other hand, surface charges and different chemical bonds of the nanofillers can interact with the dipoles (─CF 2 ─/─CH 2 ─) and ions of the polymer so that the dipoles can self‐orient themselves without external field and generate a net dipole moment of the PVDF film.…”

Section: Filler‐induced Phase Transformation In Pvdfmentioning

confidence: 99%

“…For instance, Xue et al demonstrated the effect of CsPbBr 3 perovskite NPs concentration on the structure and the dielectric property of PVDF (Figure 5). [70,81] The XRD (Figure 5a) and FTIR (Figure 5b) of the nanocomposite exhibited the structural transformation with increasing CsPbBr 3 concentration (2-8 wt%). Their study suggested that CsPbBr 3 can efficiently facilitate the transformation of the 𝛼-phase to the 𝛽-phase without affecting the stability and flexibility of the host polymer.…”

Section: Nanofiller-induced Structural Change and The Dielectric Prop...mentioning

confidence: 99%

Section: Mechanical Sensormentioning

confidence: 99%

“…The aligned dipoles by electric poling relax to the initial random alignment, whereas the alignment of the self-polarized dipoles by the electrostatic interaction with the nanofillers is locked. Reproduced with permission [70]. Copyright 2022, Royal Society of Chemistry.…”

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Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Chatterjee

Das

Saha

et al. 2023

Advanced Sensor Research

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Piezoelectric self‐powered sensors are promising platforms for wearable portable devices. Poly(vinylidene fluoride) (PVDF) and its copolymer derivatives are extensively explored as a soft piezoelectric material owing to their high piezoelectric coefficient, chemical thermal stability, biocompatibility, lightweight, and excellent flexibility. It is proved that the dominance of the electroactive (EA) β‐phase crystals versus the non‐electroactive α‐phase crystals is one of the key parameters to obtaining high piezoelectric performance of PVDF. Conventional methods, such as mechanical stretching, electrical poling, and high‐temperature annealing, are investigated to enhance the fraction of the β‐phase. Recently, embedding nanoscale fillers in the PVDF matrix has been investigated to further increase the β‐phase fraction and achieved considerable advances. The introduction of nanofillers is also advantageous in terms of improving the electrical conductivity and dielectric properties of PVDF, which are not readily obtained through conventional methods. This review introduces the principles of EA phase transformation in the presence of nanofillers and summarizes recent advances achieved by introducing various fillers, such as perovskites, oxide semiconductors, and 2D chalcogenides. The potential sensor applications of the PVDF nanocomposites responding to temperature, light, acoustic, and mechanical stimuli are reviewed. This review ends with the outlook of this new approach.

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Section: Filler‐induced Phase Transformation In Pvdfmentioning

confidence: 99%

Section: Nanofiller-induced Structural Change and The Dielectric Prop...mentioning

confidence: 99%

Section: Mechanical Sensormentioning

confidence: 99%

mentioning

confidence: 99%

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Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Chatterjee

Das

Saha

et al. 2023

Advanced Sensor Research

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“…This approach of dopant-mediated switching could be one of the prominent solutions for the effective realization of P(VDF-HFP) in practical applications, which suffers disadvantages due to high coercive voltage. To foster the electroactive β-phase in P(VDF-HFP) over the thermodynamically stable nonpolar α-phase, pivotal techniques of electrical poling, incorporation of dopants, and electrospinning in nanofiber morphology can be used. − Although a lot of effort has been invested to nucleate the β-phase through different dopant incorporations (ZnO, PZT, BaTiO 3 , and halide perovskites), − the mechanism of the dopants for the nucleation of the β-phase in the regime of molecular dipoles and its effect on the ferroelectric properties is yet to be investigated extensively. Therefore, a detailed study is necessary to build up the fundamental understanding.…”

Section: Introductionmentioning

confidence: 99%

Utilizing Strain-Engineered Stable Halide Perovskite for Interfacial Interaction with Molecular Dipoles To Enhance Ferroelectric Switching and Piezoresponse in Polymer Composite Nanofibers

Mallick¹,

Gupta²,

Jain³

et al. 2022

Langmuir

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Mechanical and solar to electrical energy conversion using piezoand ferroelectric and photovoltaic effects may be a practical answer to the rising energy demand. In this quest, piezoelectric polymer poly(vinylidene fluoridehexafluoroproylene) (P(VDF-HFP)) has gained interest due to its superior piezo-and ferroelectricity. In photovoltaic applications, inorganic halide perovskite (IHP) of CsPbI 3 is considered a prime model compound. However, its application is limited because of the photoactive perovskite phase instability at ambient conditions. Here, we report the in situ synthesis of the stable perovskite γ-CsPbI 3 through an electrospinning process at room temperature, encapsulated within a ferroelectric copolymer poly(vinylidene fluoridehexafluoroproylene) (P(VDF-HFP)) as a composite nanofiber. Computational calculation using density functional theory (DFT) reveals that tensile strain plays a critical role in the dynamical stabilization of γ-CsPbI 3 . This tensile strain is triggered by the electrospinning process, which aids in the formation and growth of γ-CsPbI 3 . In the CsPbI 3 −P(VDF-HFP) composite nanofiber, γ-CsPbI 3 nucleates the polar β-crystalline phase in P(VDF-HFP), which results in the intrinsic piezo-and ferroelectric characteristics. The γ-CsPbI 3 aids in preferable molecular dipole orientation, resulting in improved nanoscale piezo-and ferroelectric properties. The composite nanofiber features a higher piezoelectric d 33 magnitude (∼30 pm/V) and lower decay constant for polarized domains (τ composite ≈ 17). The composite was utilized as a piezoelectric nanogenerator to demonstrate human physiological motion monitoring in self-power mode. The relevant pressure sensitivities of 81 and 40 mV/kPa for the low-pressure (<0.6 kPa) and high-pressure (>0.6 to 12 kPa) ranges, respectively, promise its suitability in the health care sector.

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Long‐Lasting, Steady and Enhanced Energy Harvesting by Inserting a Conductive Layer into the Piezoelectric Polymer

Jang,

Kim,

Jeon

et al. 2024

Adv Funct Materials

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Flexibility, higher piezoelectric performance, and long‐lasting stability of devices have a great demand in next generation energy technologies. Polyvinylidene fluoride (PVDF) polymer has a greater mechanical flexibility, but it suffers from low piezoelectric performance. Herein, sandwich‐structured piezoelectric film (SS‐PF) is designed by inserting the conductive poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) layer between two PVDF layers. The SS‐PF based flexible piezoelectric energy harvester (f‐PEH) generates higher voltage and current of 3.73 times and 4.64 times than the pristine PVDF film type f‐PEH. Moreover, the SS‐PF based f‐PEH shows no degradation in the output voltage confirming the excellent long‐lasting stability over 6 months. DFT simulation shows the occurrence of intermolecular forces between the PVDF/PEDOT:PSS interface. The electric field‐dependent charges alignment in PEDOT:PSS may induce the charge accumulation at the PSS‐PVDF interface and charge depletion at the PEDOT‐PVDF interface leading to the change in orientation of molecular structure in PVDF. Next, the SS‐PF based f‐PEH is tested for a vibration sensor to monitor the vibrations of curvy pipes and machines, and its output voltages are comparable with the commercial PVDF vibration sensor to confirm the real‐time use. The results present a novel design strategy, indicating a new direction for investigating piezo‐polymer‐based f‐PEH.

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The mechanism of a PVDF/CsPbBr₃ perovskite composite fiber as a self-polarization piezoelectric nanogenerator with ultra-high output voltage

Abstract: A Piezoelectric properties of conventional piezoelectric materials are generally obtained through rearrangement of dipoles by electric poling process. However, piezoelectric properties show significant attenuation after removal of external electric field...

Cited by 67 publications

References 57 publications

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Utilizing Strain-Engineered Stable Halide Perovskite for Interfacial Interaction with Molecular Dipoles To Enhance Ferroelectric Switching and Piezoresponse in Polymer Composite Nanofibers

Long‐Lasting, Steady and Enhanced Energy Harvesting by Inserting a Conductive Layer into the Piezoelectric Polymer

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The mechanism of a PVDF/CsPbBr3 perovskite composite fiber as a self-polarization piezoelectric nanogenerator with ultra-high output voltage

Abstract: A Piezoelectric properties of conventional piezoelectric materials are generally obtained through rearrangement of dipoles by electric poling process. However, piezoelectric properties show significant attenuation after removal of external electric field...

Cited by 67 publications

References 57 publications

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Utilizing Strain-Engineered Stable Halide Perovskite for Interfacial Interaction with Molecular Dipoles To Enhance Ferroelectric Switching and Piezoresponse in Polymer Composite Nanofibers

Long‐Lasting, Steady and Enhanced Energy Harvesting by Inserting a Conductive Layer into the Piezoelectric Polymer

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The mechanism of a PVDF/CsPbBr₃ perovskite composite fiber as a self-polarization piezoelectric nanogenerator with ultra-high output voltage