Development of Multiferroism in PVDF with CoFe2O4 Nanoparticles

Behera, C.; Choudhary, R. N. P.; Das, Piyush R.

doi:10.1007/s10965-017-1208-5

Cited by 21 publications

(9 citation statements)

References 36 publications

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“…The saturation magnetization, obtained by plotting M v. 1/H 2 and extrapolating to zero, was found to be 47.4 emu/g for the CFN alone. This is in line with previous results on the saturation magnetization reported elsewhere [1,27,28,30,52,53]. The coercivity was on the order of 2 kOe, consistent with the hard magnetic cobalt ferrite material.…”

Section: Magnetic Propertiessupporting

confidence: 92%

“…A number of preparation methods have been reported for PVDF-based nanocomposites films using magnetic nanoparticles, such as PVDF-BiFeO 3 [26], PVDF-CoFe2O4 [27,28], PVDF-NaNbO 3 -Ni [12], PVDF-HFP/clay/NF [29], and PVDF-NiFe 2 O 4 [30,31], using either a solution casting, hot press, or electrospinning to improve the magneto-electric coupling. In those studies, enhancements in magneto-electric coupling and dielectric constant with the increase in filler nanoparticles were reported.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and magnetoelectric investigation of flexible PVDF-TrFE/cobalt ferrite nanocomposite films

Sapkota

Hasan

Martin

et al. 2022

Mater. Res. Express

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Flexible nanocomposite films, with cobalt ferrite nanoparticles (CFN) as the ferromagnetic component and polyvinylidene fluoride–trifluoroethylene (PVDF-TrFE) copolymer as the ferroelectric matrix, were fabricated using a blade coating technique. Nanocomposite films were prepared using a two-step process; the first process involves the synthesis of cobalt ferrite (CoFe2O4) nanoparticles using a sonochemical method, and then incorporation of various weight percentages (0, 2.5, 5, and 10%) of cobalt ferrite nanoparticles into the PVDF-TrFE to form nanocomposites. The ferroelectric polar β phase of PVDF-TrFE was confirmed by X-ray diffraction (XRD). Thermal studies of films showed notable improvement in the thermal properties of the nanocomposite films with the incorporation of nanoparticles. The ferroelectric properties of the pure polymer/composite films were studied, showing a significant improvement of maximum polarization upon 5wt% CFN loading in PVDF-TrFE composite films compared to the PVDF-TrFE film. The magnetic properties of as-synthesized CFN and the polymer nanocomposites were studied, showing a magnetic saturation of 53.7 emu/gat room temperature, while 10% cobalt ferrite-(PVDF-TrFE) nanocomposite shows 27.6 emu/g. We also describe a process for fabricating high optical quality pure PVDF-TrFE and pinhole-free nanocomposite films. Finally, the mechanical studies revealed that the mechanical strength of the films increases up to 5 wt.% loading of the nanoparticles in the copolymer matrix and then decreases. This signifies that the obtained films could be suited for flexible electronics.

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Section: Magnetic Propertiessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Fabrication and magnetoelectric investigation of flexible PVDF-TrFE/cobalt ferrite nanocomposite films

Sapkota

Hasan

Martin

et al. 2022

Mater. Res. Express

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“…We can’t ignore the effect of space charge in the lower-frequency region. A higher filler concentration resulted in more space charge, which improved both ε r and tan δ. , Restricting the mobility of PVDF dipoles lowers the Maxwell–Wagner–Sillars interfacial polarization (MWSIP) and dielectric constant as the frequency rises . The mobility of the molecular dipoles in PVDF can follow the external ac field in the low-frequency zone.…”

Section: Resultsmentioning

confidence: 99%

“…However, they categorically fail to chase the external alternating field in the high-frequency zone. As a result, the mobility of dipoles is confined in this region and lags behind the electric field. , At higher frequencies, the dielectric constant and dielectric loss are lowered as a result of this. The insertion of CCNO in the PVDF matrix resulted in an increase in the dielectric constant and tangent loss up to a certain amount (1 wt %) of CCNO content in the polymer matrix, followed by a reduction.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the MWSIP effect helps improve the dielectric properties of composites. However, excess filler material loading causes agglomeration, which affects interfacial polarization and results in a decrease in dielectric constant. , Figure d depicts the dielectric constant and dissipation factor/dielectric loss as a function of filler concentration at 100 Hz. The frequency dispersive ac conductivity was calculated from the following equation: σ ac ( ω ) = 2 π f ε 0 ε normalr 0.25em tan nobreak0em.25em⁡ δ Figure c shows that conductivity increases with frequency, peaking at 550 μS m –1 for PNCU 1 at 10 MHz (whereas unblended film conductivity is only 110 μS m –1 ).…”

Section: Resultsmentioning

confidence: 99%

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Self-Charging Piezo-Supercapacitor: One-Step Mechanical Energy Conversion and Storage

Mondal

Thakur

Maiti³

et al. 2023

ACS Appl. Mater. Interfaces

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With the contemplations of ecological and environmental issues related to energy harvesting, piezoelectric nanogenerators (PNGs) may be an accessible, sustainable, and abundant elective wellspring of energy in the future. The PNGs’ power output, however, is dependent on the mechanical energy input, which will be intermittent if the mechanical energy is not continuous. This is a fatal flaw for electronics that need continuous power. Here, a self-charging flexible supercapacitor (PSCFS) is successfully realized that can harvest sporadic mechanical energy, convert it to electrical energy, and simultaneously store power. Initially, chemically processed multimetallic oxide, namely, copper cobalt nickel oxide (CuCoNiO4) is amalgamated within the poly(vinylidene fluoride) (PVDF) framework in different wt % to realize high-performance PNGs. The combination of CuCoNiO4 as filler creates a notable electroactive phase inside the PVDF matrix, and the composite realized by combining 1 wt % CuCoNiO4 with PVDF, coined as PNCU 1, exhibits the highest electroactive phase (>86%). Under periodic hammering (∼100 kPa), PNGs fabricated with this optimized composite film deliver an instantaneous voltage of ∼67.9 V and a current of ∼4.15 μA. Furthermore, PNG 1 is ingeniously integrated into a supercapacitor to construct PSCFS, using PNCU 1 as a separator and CuCoNiO4 nanowires on carbon cloth (CC) as the positive and negative electrodes. The self-charging behavior of the rectifier-free storage device was established under bending deformation. The PSCFS device exhibits ∼845 mV from its initial open-circuit potential ∼35 mV in ∼220 s under periodic bending of 180° at a frequency of 1 Hz. The PSCFS can power up various portable electronic appliances such as calculators, watches, and LEDs. This work offers a high-performance, self-powered device that can be used to replace bulky batteries in everyday electronic devices by harnessing mechanical energy, converting mechanical energy from its environment into electrical energy.

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PVDF–novel double perovskite (Nd2MnFeO6) organic–inorganic nano-composite membrane: for flexible energy storage devices

Dorle,

Acharya,

Shirbhate

2023

Polym. Bull.

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Development of Multiferroism in PVDF with CoFe2O4 Nanoparticles

Cited by 21 publications

References 36 publications

Fabrication and magnetoelectric investigation of flexible PVDF-TrFE/cobalt ferrite nanocomposite films

Fabrication and magnetoelectric investigation of flexible PVDF-TrFE/cobalt ferrite nanocomposite films

Self-Charging Piezo-Supercapacitor: One-Step Mechanical Energy Conversion and Storage

PVDF–novel double perovskite (Nd2MnFeO6) organic–inorganic nano-composite membrane: for flexible energy storage devices

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