High-performance piezoelectric nanogenerators featuring embedded organic nanodroplets for self-powered sensors

Li, Hai; Lim, Sooman

doi:10.1039/d2ta02276a

Cited by 29 publications

(19 citation statements)

References 66 publications

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“…In this direction, Li et al introduced organic 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FDTS) droplets as liquid fillers for the piezoelectric enhancement of PVDF. [91] The addition of the droplet filler led to a maximum 𝛽-phase content (F 𝛽 = 83.6%) when 10 wt% of filler content in the concentration range of 5-15 wt%, and brought a highly sensitive pressure sensor. The strong intermolecular hydrogen bonding between the FDTS nanodroplets and PVDF chains was responsible for such phase transition.…”

Section: Mechanical Sensormentioning

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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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: Mechanical Sensormentioning

confidence: 99%

“…NanofillerProcessing techniques Filler concentration 𝛽-phase(F 𝛽 ), Electroactive phase (𝛽+𝛾) (F EA ) [%]Piezoelectric charge coefficient (d 33 ) [pC N −1 ] PP (for 500 kPa)[91] …”

mentioning

confidence: 99%

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Chatterjee

Das

Saha

et al. 2023

Advanced Sensor Research

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“…The endurance test shown in Figure S14 proves that PC@PVDF-TrFE#2 can withstand more than 15000 continuous bending cycles under 2 Hz, indicating the excellent flexibility and durability of our piezoelectric device. To the best of our knowledge, PC@PVDF-TrFE#2 possesses the highest output performances among all the reported all-organic piezoelectric energy harvesters (Figure g). ,,,− In addition, the piezoelectric performance of PC@PVDF-TrFE is even better than those of most organic–inorganic composites. This comparison further demonstrated the superiority of our coaxial electrospinning strategy to produce high-performance flexible piezoelectric materials and devices.…”

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confidence: 92%

Modulus-Modulated All-Organic Core–Shell Nanofiber with Remarkable Piezoelectricity for Energy Harvesting and Condition Monitoring

et al. 2023

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The low piezoelectricity of piezoelectric polymers significantly restricts their applications. Introducing inorganic fillers can slightly improve the piezoelectricity of polymers, whereas it is usually at the cost of flexibility and durability. In this work, using a modulus-modulated core–shell structure strategy, all-organic nanofibers with remarkable piezoelectricity were designed and prepared by a coaxial electrospinning method. It was surprisingly found that the introduction of a nonpiezoelectric polymeric core (e.g., polycarbonate, PC) can result in 110% piezoelectric coefficient (d 33) enhancement in a poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) nanofiber. Accordingly, the all-organic PVDF-TrFE@PC core–shell nanofiber exhibits record-high energy-harvesting performance (i.e., 126 V output voltage, 710 mW m–2 power density) among the reported organic piezoelectric materials. In addition, the excellent sensing capability of the core–shell nanofiber enabled us to develop a wireless vibration monitoring and analyzing system, which realizes the real-time vibration detection of a power transformer.

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“…[8][9][10] Consequently, various efforts have been made to investigate unique energy-supply systems that use mechanical movements as their power source. [11][12][13][14] In particular, piezoelectric nanogenerators (PENGs) and triboelectric nanogenerators (TENGs) have attracted substantial interest because they effectively transform a variety of irregular mechanical energies (such as human motion, water flow, and sonic waves) into usable elec-tric energy. [15][16][17][18][19] In contrast to TENGs, which are limited by temperature variations, stray capacitances, and sliding-based structures, PENGs are driven by the polarization of piezoelectric materials, which do not experience these limitations.…”

Section: Introductionmentioning

confidence: 99%

Self-poled and transparent polyvinylidene fluoride-co-hexafluoropropylene-based piezoelectric devices for printable and flexible electronics

Lim

2023

Nanoscale

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High-performance piezoelectric nanogenerators featuring embedded organic nanodroplets for self-powered sensors

Abstract: A novel solid–liquid nanocomposite-based piezoelectric nanogenerator was developed by embedding FDTS droplets into a PVDF matrix, which delivers unprecedented properties.

Cited by 29 publications

References 66 publications

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Nanofiller‐Induced Enhancement of PVDF Electroactivity for Improved Sensing Performance

Modulus-Modulated All-Organic Core–Shell Nanofiber with Remarkable Piezoelectricity for Energy Harvesting and Condition Monitoring

Self-poled and transparent polyvinylidene fluoride-co-hexafluoropropylene-based piezoelectric devices for printable and flexible electronics

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