Enhanced Piezoelectricity of PVDF-TrFE Nanofibers by Intercalating with Electrosprayed BaTiO₃

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(35), P. 41806 - 41816

Published: Aug. 23, 2023

Over the past few decades, flexible piezoelectric devices have gained increasing interest due to their wide applications as wearable sensors and energy harvesters. Poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE), one of polymers, has caught considerable attention because its high flexibility, thermal stability, biocompatibility. However, relatively lower piezoelectricity limits broader applications. Herein, we present a new approach improving PVDF-TrFE nanofibers by integrating barium titanate (BTO) nanoparticles. Instead being directly dispersed into nanofibers, BTO nanoparticles were electrosprayed between nanofiber layers create sandwich structure. The results showed that sample with sandwiched much higher output compared uniformly in maximum ∼ 457% enhancement. Simulation suggested enhanced is larger strain induced Additionally, might be better poled during electrospraying field strength, which also believed contribute piezoelectricity. potential mats sensor for measuring biting force array pressure mapping was demonstrated.

Language: Английский

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Ultrahigh Electro‐Bending Deformation in Lead‐free Piezoelectric Ceramics via Defect Concentration Gradient Design

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 14, 2024

Recent breakthroughs in defect-engineered lead-free piezoelectric ceramics have reported remarkable electrostrain values, surpassing the limit of lattice distortion. This has aroused wide concern on bending deformation and associated underlying mechanism. Herein, via designing with varying volatilization characteristics, it is uncovered that ultrahigh electrobending primarily attributed to a large strain gradient induced by unevenly distributed defect dipoles. In 0.5 mm thick Sr/Sn co-doped potassium sodium niobate featuring volatile K/Na elements, inherent bipolar value can reach 0.3% at 20 kV cm

Language: Английский

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3D Printing of Flexible BaTiO₃/Polydimethylsiloxane Piezocomposite with Aligned Particles for Enhanced Energy Harvesting

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(9), P. 11740 - 11748

Published: Feb. 23, 2024

With the rapid development of human–machine interactions and artificial intelligence, demand for wearable electronic devices is increasing uncontrollably all over world; however, an unsustainable power supply such sensors continues to restrict their applications. In present work, piezoelectric barium titanate (BaTiO3) ceramic powder with excellent properties was prepared from milled precursors through a solid-state reaction. To fabricate flexible device, as-prepared BaTiO3 mixed polydimethylsiloxane (PDMS) polymer. The BaTiO3/PDMS ink rheological extruded smoothly by direct writing technology (DIW). particles were aligned due shear stress effect during printing process. Subsequently, as-printed composite assembled into sandwich-type device effective energy harvesting. It observed that maximum output voltage current this reached 68 V 720 nA, respectively, content 6 vol %. Therefore, material extrusion-based three-dimensional (3D) technique can be used prepare composites efficient

Language: Английский

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Advanced Materials for Energy Harvesting and Soft Robotics: Emerging Frontiers to Enhance Piezoelectric Performance and Functionality

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Abstract Piezoelectric energy harvesting captures mechanical from a number of sources, such as vibrations, the movement objects and bodies, impact events, fluid flow to generate electric power. Such power can be employed support wireless communication, electronic components, ocean monitoring, tissue engineering, biomedical devices. A variety self‐powered piezoelectric sensors, transducers, actuators have been produced for these applications, however approaches enhance properties materials increase device performance remain challenging frontier research. In this regard, intrinsic polarization designed or deliberately engineered piezo‐generated This review provides insights into mechanisms piezoelectricity in advanced materials, including perovskites, active polymers, natural biomaterials, with focus on chemical physical strategies piezo‐response facilitate their integration complex systems. Applications soft robotics are overviewed by highlighting primary figures merits, actuation mechanisms, relevant applications. Key breakthroughs valuable further improve both discussed, together critical assessment requirements next‐generation systems, future scientific technological solutions.

Language: Английский

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High piezoelectricity induced by lattice distortion and domain realignment in Li₂CO₃-added lead-based ceramics

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(47), P. 25945 - 25954

Published: Jan. 1, 2023

The 0.2Pb(Ni 1/3 Nb 2/3 )O 3 –0.1Pb(Zn –0.7Pb(Zr 0.46 Ti 0.54 + x wt% Li 2 CO ceramics were synthesized by the solid–state reaction method.

Language: Английский

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Decoding the Piezo-Contributions of Potassium Sodium Niobate Ceramics

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(1), P. 658 - 666

Published: Jan. 2, 2024

The contributions to the piezoelectric coefficient d33 from intrinsic contribution, reversible low-field domain wall vibration, and irreversible switching displacement of walls have been quantitatively investigated in potassium sodium niobate (KNN) ceramics with different phase structures. By measuring at a large field hysteresis under subswitching conditions following Rayleigh relations, intrinsic/extrinsic reversible/irreversible responses are studied understand role boundaries enhancing piezoelectricity. This lattice strongly dependent on crystal structures examined ceramics. intrinsic, extrinsic, extrinsic coefficients can both be enhanced instability regime for KNN-based With respect contribution ratio, an orthorhombic-tetragonal (O-T) region larger values as compared those having orthorhombic (O)/rhombohedral-orthorhombic-tetragonal (R-O-T)/rhombohedral-tetragonal (R-T) regions. For KNN ceramics, response is major contributor high Strongly linked temperature, O/O-T/R-O-T phases decrease first then increase near transition temperature O T range, opposite tendency R-T phases.

Language: Английский

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Enhanced and reliable high-power performance of PMN–PZT-based piezoelectric ceramics

Ceramics International, Journal Year: 2024, Volume and Issue: 50(10), P. 17106 - 17115

Published: Feb. 15, 2024

Language: Английский

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Chemical-Composition Tuning-Enabled Optimization of Structure, Properties, and Performance of Lead-Free (1 – x)BaZr_0.05Ti_0.95O₃–(x)Ba_0.92Ca_0.08TiO₃ Electroceramics

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(5), P. 2130 - 2146

Published: Jan. 31, 2024

Barium titanate (BaTiO3) and its derivatives, which belong to the family of perovskite oxides, offer a class lead (Pb)-free ferroelectric piezoelectric materials with numerous applications in electronic electromagnetic devices. In this study, we report on Pb-free variable composition (1 – x)BZT5–(x)BCT8 (x = 0.00–1.00) where BZT5 refers BaZr0.05Ti0.95O3 BCT8 Ba0.92Ca0.08TiO3. The substitution Zr4+ for Ti4+ Ca2+ Ba2+ BaTiO3 matrix enhances properties performance desirable involving capacitors memory storage X-ray diffraction (XRD) studies coupled Rietveld refinement analyses confirm biphasic (major tetragonal minor orthorhombic) crystal structure all samples. Raman spectroscopic corroborate XRD results validate structure. Chemically homogeneous samples exhibit characteristic granular-dense microstructure. density measurements using Archimedes' principle indicate that sample is above 5.31 g/cm3 (90%). Ferroelectric display typical polarization-electric field (P–E) hysteresis, confirming nature electric field-induced strain butterfly (S–E) loops, dielectric compositions significant prospects future capacitor applications. show exhibits maximum value 0.70 squareness ratio, indicating can be suitable material permanent random-access (Fe-RAM) applications, whereas 0.75BZT5–0.25BCT8 switching moderately higher remnant polarization (Pr 11.22 μC/cm2) lower coercive (Ec 2.54 kV/cm) are obtained BCT8. coefficient x 0.50 converse 430 ± 1 pm/V 0.179 (% strain). Q-factor was observed 4.13 × 10–4 (cm2/μC)2, among studied compositions, suggesting may candidate energy conversion transducer

Language: Английский

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Well-balanced performance achieved in PZT piezoceramics via a multiscale regulation strategy

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(21), P. 5285 - 5294

Published: Jan. 1, 2024

Emerging high-power piezoelectric applications demand the development of materials featuring both a high mechanical quality factor (

Language: Английский

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Enhanced high-power behaviors of Mn-doped Pb (In1/2Nb1/2) O3-Pb(Mg1/3Nb2/3) O3-PbTiO3 piezoelectric crystals through combining direct and alternating current polarization

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 989, P. 174370 - 174370

Published: April 1, 2024

Language: Английский

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