2 research outputs found
Defect-Induced Self-Poling in a W<sub>18</sub>O<sub>49</sub>/PVDF Piezoelectric Energy Harvester
W18O49 nanostructures, previously used for
electrocatalysis, energy storage, electrochromic, and gas sensing
applications, are incorporated in poly(vinylidene fluoride) (PVDF)
in this work for mechanical energy-harvesting applications. X-ray
diffraction spectroscopy (XRD), high-resolution transmission electron
microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), Fourier
transform infrared spectroscopy (FTIR), Raman spectroscopy, differential
scanning calorimetry (DSC), and the polarization-electric (P-E) field
loop test prompts the addition of W18O49 nanorods
in PVDF nucleates and stabilizes the piezoelectric polar γ-phase
in the nanocomposite. Electrochemical experiments were employed for
the first time to relate the event of the evolution of crystalline
phases in PVDF to the transfer of electrons to the electrolyte from
PVDF using the data from cyclic voltammetry (CV) and electrochemical
impedance spectroscopy (EIS). High dielectric constant (ε′)
and low dielectric loss (ε″) values were obtained proportionately
for different weight percentage additions of W18O49 nanorods in PVDF. DSC was employed to study the crystallization
kinetics of γ-phase evolution. Piezoresponse force microscopy
(PFM) was used to compare the piezoelectric responses from the PVDF
nanocomposites. The W18O49/PVDF nanocomposite
could generate a peak open circuit voltage of ∼6 V and a peak
short circuit current of ∼700 nA. The W18O49/PVDF nanocomposite could light two commercial blue-light-emitting
diodes (LEDs) with hand impulse imparting
Defect-Induced Self-Poling in a W<sub>18</sub>O<sub>49</sub>/PVDF Piezoelectric Energy Harvester
W18O49 nanostructures, previously used for
electrocatalysis, energy storage, electrochromic, and gas sensing
applications, are incorporated in poly(vinylidene fluoride) (PVDF)
in this work for mechanical energy-harvesting applications. X-ray
diffraction spectroscopy (XRD), high-resolution transmission electron
microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), Fourier
transform infrared spectroscopy (FTIR), Raman spectroscopy, differential
scanning calorimetry (DSC), and the polarization-electric (P-E) field
loop test prompts the addition of W18O49 nanorods
in PVDF nucleates and stabilizes the piezoelectric polar γ-phase
in the nanocomposite. Electrochemical experiments were employed for
the first time to relate the event of the evolution of crystalline
phases in PVDF to the transfer of electrons to the electrolyte from
PVDF using the data from cyclic voltammetry (CV) and electrochemical
impedance spectroscopy (EIS). High dielectric constant (ε′)
and low dielectric loss (ε″) values were obtained proportionately
for different weight percentage additions of W18O49 nanorods in PVDF. DSC was employed to study the crystallization
kinetics of γ-phase evolution. Piezoresponse force microscopy
(PFM) was used to compare the piezoelectric responses from the PVDF
nanocomposites. The W18O49/PVDF nanocomposite
could generate a peak open circuit voltage of ∼6 V and a peak
short circuit current of ∼700 nA. The W18O49/PVDF nanocomposite could light two commercial blue-light-emitting
diodes (LEDs) with hand impulse imparting