Barium titanate based paraelectric material incorporated Poly(vinylidene fluoride) for biomechanical energy harvesting and self-powered mechanosensing

Two-Dimensional Metal-Organic Framework Incorporated Highly Polar PVDF for Dielectric Energy Storage and Mechanical Energy Harvesting

“…This huge enhancement of output electrical signal of NPVDF-based PENG compared to that of PVDF-based PENG is nothing but due to the significantly enhanced polarity and Young’s modulus of the former compared to that of the latter [ 39 ]. Both devices work on the basis of a similar mechanism, as shown in Figure 9 c. The occurrence of output electrical signals from these types of un-poled PENGs is mainly driven by the stress-induced poling effect [ 50 , 60 ]. At the initial state (step-i), when there is no applied force, the polar dipoles within the films are oriented randomly, which results in zero piezoelectric potential.…”

“…At the initial state (step-i), when there is no applied force, the polar dipoles within the films are oriented randomly, which results in zero piezoelectric potential. In the next step (step-ii)), when the applied vertical compressive force comes into play, the piezoelectric potential is abruptly generated within the dipoles, and the dipoles orient themselves in a single direction along the applied force due to their high directionality caused by stress-induced poling effect [ 50 , 60 ]. As a result of this fact, the piezoelectric potential is developed across the thickness of the composite films.…”

Tuning the Electromechanical Response of P(VDF-TrFE)/ZnSnO3-Based Binary Piezoelectric Composites for Biomechanical Energy-Harvesting and Self-Powered Mechanosensing

“…This type of electricity generation from polymer-based unpoled PENG devices is governed by the stress-induced poling effect as discussed in several earlier reports (also see Note S1 and Figure S9). − Although the host P­(VDF-TrFE) matrix and added ZnSnO 3 filler exhibit the negative and positive piezoelectric coefficients, respectively, this type of working mechanism helps in improving the overall energy-harvesting performances of the PENG devices up to a certain amount of filler loading, which might be attributed to better dipole alignment via interfacial interaction (Note S1). The improvement of piezoelectric energy-harvesting activity of unpoled P­(VDF-TrFE)-based PENG upon optimum loading of inorganic fillers having a positive piezoelectric coefficient is consistent with the previous literature. ,, …”

Morphotropic Phase Boundary-Assisted Lead-Free BaTiO3/PDMS Composite-Based Hybrid Energy Harvester: A Portable Power Source for Wireless Power Transmission

“…To date, various approaches (doping, , defect engineering, , etc., for ceramic materials and ceramic filler inclusion, − electrospinning, , etc., for polymer materials) have been utilized to amplify the output properties of PEH. On the other hand, for TEH, output power density, which is a measure of its superiority, mainly depends on the dielectric constant and surface charge density of the triboelectric layers .…”

“…10.1021/acsaem.3c00635. Advantages of the Pechini method over other synthesis procedures, material characterization, Rietveld refined lattice parameters and fitting factors of synthesized BTS, XPS survey spectra and core level spectra of BTS, original file for EDX spectra and mapping of BTS, DSC study of synthesized BTS particles within a temperature of −20 °C to 200 °C, DSC analysis of BTS particles, FESEM micrograph of sintered BTS pellets, variation of relative permittivity and loss tangent with frequency of BTS, variation of loss tangent of BTS with temperature at frequency 100 Hz, 1 kHz, 10 kHz, and 100 kHz, analysis for temperature variation of loss tangent (BTS), a piezoelectric charge coefficient measurement setup, sample holder, and measurement screen, piezoelectric output voltage and output current of BTS/PDMS-based piezoelectric energy harvester, variation of output voltage and current from PEH with filler concentration, calculation of internal resistance and capacitance of HEH, plot of 1/V L vs 1/R L of the HEH15 device, schematic diagram of the fabricated device with microswitch, output performance of the HEH device over 8 weeks of operation, output generated from wrist and elbow movement using HEH15 device, and stability test (output transmitted from the transmitter end and received voltage from the receiver end after several cycles of operation HEH15) (PDF)Output voltage patterns generated from walking (MP4) Output voltage patterns generated from jogging (MP4) Functional Materials Devices Division, CSIR�Central Glass and Ceramic Research Institute, Kolkata, West Bengal 700032, India Abhishek Sasmal − Functional Materials and Devices Division, CSIR�Central Glass and Ceramic Research Institute, Kolkata, West Bengal 700032, India; orcid.org/ 0000-0002-4332-246X Epsita Kar − Functional Materials and Devices Division, CSIR�Central Glass and Ceramic Research Institute, Kolkata, West Bengal 700032, India Complete contact information is available at: https://pubs.acs.org/10.1021/acsaem.3c00635…”