Large energy density at high-temperature and excellent thermal stability in polyimide nanocomposite contained with small loading of BaTiO3 nanofibers

Effects of the Particle Size of BaTiO3 Fillers on Fabrication and Dielectric Properties of BaTiO3/Polymer/Al Films for Capacitor Energy-Storage Application

“…Recently, the capacitors based on high energy-storage-density dielectric materials (e.g., ceramics) have attracted increasing attention because their ultrahigh power density, excellent charge/discharge capability and long lifetime [19]. For energy-storage applications, the dielectric materials are expected to possess high dielectric constants and breakdown strengths, low dielectric losses, good temperature stability and high flexibility for easy manufacturing [20]. However, it is still a great challenge for materials scientists to achieve the high dielectric materials with the above excellent overall properties.…”

High-Temperature Polyimide Dielectric Materials for Energy Storage

“…Therefore, it could be shown that the introduced linear ceramic filler had a positive effect on the dielectric properties and U e of the composite material [20]. Hu et al [1] prepared and studied the dielectric properties of a BT nanofiber/PI (BT-NF/PI) composite membrane over the temperature range 20-200°C. The introduction of BT-NF at 9 vol% increased the ε r for BT-NF/PI to 8.3 while the dielectric loss increased only slightly; these effects could be attributed to dipolar polarization and interfacial displacement of the nanocomposites.…”

“…At 1 vol% BT-NF, the PI nanocomposites also exhibited high energy utilization efficiency and good thermal stability. At 150 and 100°C, when the efficiency was greater than 90%, the discharge energy density values were >2.1 J cm À3 and ≈4Jcm À3 , respectively [1]. The authors used electrospinning to prepare BT-NF while the PI composite membranes were prepared by in situ dispersion polymerization.…”

“…With the rapid development of the global economy and a rising population, the search for efficient and clean energy and energy storage technologies has become a priority worldwide. Because of its exceptionally fast energy conversion rate, long life, and environmental friendliness, dielectric energy storage technology has been used in applications for the electronics and power industries such as wearable electronic devices, hybrid vehicles, and weapon systems [1]. As the trend toward high-performance miniaturized electronic devices continues, the demand for dielectric materials with high energy storage density (U e ) is increasing.…”

“…As the trend toward high-performance miniaturized electronic devices continues, the demand for dielectric materials with high energy storage density (U e ) is increasing. U e is an important parameter to measure the energy storage performance of dielectric materials: (1) where ε r is the permittivity of material and ε o is the permittivity of free space (8.85 Â 10 À12 Fm À1 ) [2]. This requires that the dielectric material has a high ε r while having a low dielectric loss and a high breakdown strength.…”