Enhanced dielectric and ferroelectric properties of cobalt ferrite (CoFe₂O₄) fiber embedded polyvinylidene fluoride (PVDF) multiferroic composite films

Synergistic effect of graphene on dielectric and piezoelectric characteristic of PVDF‐(BZT‐BCT) composite for energy harvesting applications

“…The addition of the GO/rGO to the PVDF‐(BZT–BCT) matrix makes the composite lossy (G‐0.32 and R‐0.32) which can be identified by the large loop area 21 . The large discontinuity persists in such lossy samples, and similar hysteresis loops have also been reported in the articles 51–55 . For further verification, the piezoelectric study was also conducted after poling.…”

“…21 The large discontinuity persists in such lossy samples, and similar hysteresis loops have also been reported in the articles. [51][52][53][54][55] For further verification, the piezoelectric study was also conducted after poling.…”

Functionalized graphene oxide/polyvinylidene fluoride composite membrane acting as a triboelectric layer for hydropower energy harvesting

“…However, whereas α is the most common phase and the simplest to obtain, it is hard to obtain the β phase under normal circumstances. [24][25][26] It could be quite fascinating to perform α to β transformation via mechanical deformation owing to various advantages such as simple technique, high efficiency, and large production. Nevertheless, after removing the mechanical force, the β phase may be reverted to its original configuration, causing a decline in β phase content.…”

“…Thus, increasing the concentration of β phase is an efficient technique to significantly improve the PVDF‐based TENG performance considerably. However, whereas α is the most common phase and the simplest to obtain, it is hard to obtain the β phase under normal circumstances 24‐26 . It could be quite fascinating to perform α to β transformation via mechanical deformation owing to various advantages such as simple technique, high efficiency, and large production.…”

Tuning the Energy Storage Efficiency in PVDF Nanocomposites Incorporated with Crumpled Core–Shell BaTiO3@Graphene Oxide Nanoparticles

“…Film capacitors that store energy electrostatically have an ultrafast charge/discharge rate, as well as a long lifetime, superior power density, excellent cycle reliability, and environmental friendliness. They have become the most commonly used power sources in the modern electronic power industry such as wearable electronics and hybrid vehicles. − However, compared with other energy storage technologies, film capacitors exhibit lower energy density that largely restrains the endurance of a power device. , For instance, the discharged energy density of a commercially available biaxially oriented polypropylene film capacitor is only around 2 J cm –3 , which fails to fulfill the growing demand for electrical systems. , Moreover, film capacitors exhibit a relatively low charge–discharge efficiency (η), which is also a vital parameter to evaluate the performance of film capacitors. It indicates that a lot of energy is converted into heat dissipation, which causes the internal temperature of the film capacitor to rise and affects the lifetime of the power equipment.…”