Influence of spinel ZnMn₂O₄ particles on the dielectric performance of PVDF‐based composites

Abstract

Spinel ZnMn 2 O 4 are widely used in lithium batteries, sensors, and catalysis due to its electrical and magnetic properties. However, the influence of the resistive switching effect on the dielectric properties of the polymer matrix induced by ZnMn 2 O 4 has not been investigated in depth. In this study, spinel ZnMn 2 O 4 powders were synthesized via the hydrothermal method, and ZnMn 2 O 4 /PVDF composites were prepared for research the influence of ZnMn 2 O 4 particles on dielectric performance of PVDF-based composites. The existence of ZnMn 2 O 4 particles improves the dielectric constant slightly, while enhances the breakdown strength of composites significantly. The maximum value of breakdown strength achieved in composite with 10 wt% ZnMn 2 O 4 is 108 kV/mm, which is five times larger than that of undoped PVDF. The enhanced dielectric properties are attributed to the quasi-Coulomb blockade effect induced by the resistive switching effect of ZnMn 2 O 4 particles under applied electric field. The results presented in this work indicate the promising of ZnMn 2 O 4 particles in dielectric and insulating composites.

Advantages and limitations of active phase silanization in PVDF composites: Focus on electrical properties and energy harvesting potential

“…Possibly, the DDTES layer can block the ramification of the conduction paths but structural defects clearly have a dominant effect. The direct contact of particles forms a pathway for conduction charges, leading to the deterioration of the breakdown strength 56–58 . Modification with APTES has led to a more homogeneous distribution of NBT‐BT particles in the film.…”

“…The direct contact of particles forms a pathway for conduction charges, leading to the deterioration of the breakdown strength. [56][57][58] Modification with APTES has led to a more homogeneous distribution of NBT-BT particles in the film. It can be assumed that the interface architecture formed in these samples, traps the space charges and limits the formation of conduction channels through the sample, allowing higher breakdown strength.…”

Understanding local interactions in freestanding flexible poly(vinylidene fluoride)/poly(3,4‐ethyelenedioxythiophene):poly(styrelenesulfonate) films using impedance, Raman, and X‐ray absorption spectroscopy

“…[26][27][28][29][30] PVDF also shows a good dielectric constant ($8 at 10 Hz). 31,32 Aqueous poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS), a conducting polymer (10 À3 S cm À1 ), was incorporated as an additive to modulate the conductivity of the host polymer (PVDF). 33 The resulting PVDF/PEDOT:PSS composite films were investigated for their AC transport properties.…”

“…In this study, poly(vinylidene fluoride) (PVDF), a semi‐crystalline polymer, was chosen as the host polymer matrix due to its flexibility, high thermal stability, mechanical stability, and versatile properties 26–30 . PVDF also shows a good dielectric constant (~8 at 10 Hz) 31,32 . Aqueous poly(3,4‐ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS), a conducting polymer (10 −3 S cm −1 ), was incorporated as an additive to modulate the conductivity of the host polymer (PVDF) 33 .…”

Interface Optimization of Metal Quantum Dots/Polymer Nanocomposites and their Properties: Studies of Multi-Functional Organic/Inorganic Hybrid

“…To enhance the dielectric, ferroelectric, and piezoelectric properties, some nanomaterials/PVDF blends are also an effective approach. Some typical nanocomposites are as follows: Fe-doped ZnO/PVDF-TrFE composite films [18], GO/PVDF/ZnO composite membranes [19], PVDF/PVDF-TrFE blended films [20], PVDF-based copolymer and terpolymer [21], PVDF/ZnSe and PVDF/Cu-ZnSe [22], MWCNTs/PVDF [23], electrospun PVDF/cellulose nanofibers [24], Au NPs/PVDF nanocomposite for nerve tissue engineering applications [25], PVDF/BaTiO 3 /carbon nanotubes nanocomposites [26], ZnMn 2 O 4 particles filled PVDF-based composites [27], and PVDF/ZnO nanofibrous composites [28]. Zhao and co-workers [29] introduced the high lithium salt content of h-BN nanosheets/PVDF-based solid-state composite polymer electrolytes.…”