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energy storage density and discharge efficiency
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Greatly enhanced discharge energy density and …
Results show that an ultrahigh recoverable energy density of 4.06 J cm −3 and a high energy-storage efficiency of 87.3% under an electric field of 350 kV cm −1 are achieved concomitantly, together with a superior high …
Bilayer-structured nanocomposites with ultrahigh energy density and large discharge efficiency at high temperature via balancing energy storage ...
1. Introduction The growing demand for electrical energy is driving the progress of new equipment for energy harvesting, conversion, and storage. Among current energy storage devices, dielectric capacitors can provide large power density (∼10 7 –10 8 W kg −1) due to their rapid charge–discharge rate (<1 μs), making them suitable for …
Simultaneously realizing ultra-high energy density and discharge efficiency in PVDF composites …
Typically, depending on the processing conditions, PVDF can crystallize into three main phases including α-, β- and γ-phase [16].For the energy storage application, the γ-phase is preferable due to its relatively lower ferroelectric loss and consequently larger discharge energy density [17]..
All-organic sandwich-structured BOPP/PVDF/BOPP dielectric films with significantly improved energy density and charge–discharge efficiency ...
The energy storage density and efficiency calculated by the integration areas of D-E curves are shown in Fig. 8 (a). As the difference between electrical displacement and polarization is negligible, the calculation can be more accessible from equation as follows: (8) U e = ∫ P r P m E d P where P r is the remnant polarization, P m …
Giant energy-storage density with ultrahigh efficiency in lead-free …
The overdamped discharge measurements show an ultrahigh discharge energy density (W D) ~3.26 J cm −3 ... M. et al. Ultrahigh energy storage density and efficiency in Bi 0.5 Na 0.5 TiO 3-based ...
High energy density and discharge efficiency polypropylene nanocomposites for potential …
Considering the factors of discharged energy density and charge-discharge efficiency, the optimum thickness of PMMA shell for PMMA@BT nanoparticles is 8 nm. Hence, the dielectric and energy performances of the films of PMMA@BT-8/PP nanocomposites with different loadings of fillers are needed to be investigated …
High energy storage density and ultrafast discharge in lead lutetium …
Linear dielectric and ferroelectric (FE) materials as dielectric capacitors have low energy density, which limits their application in high pulse power systems. As an alternative, antiferroelectric (AFE) materials have superior recoverable energy storage density and ultrafast discharge times due to their ele
Greatly enhanced discharge energy density and …
In particular, the corresponding ceramic exhibits an ultrafast discharge rate (τ 0.9 = 127 ns) and a high level of discharge energy density (U dis = 1.29 J cm −3). Our study provides the groundwork for an effective way to …
Simultaneously enhanced energy density and discharge …
Energy storage ceramics are widely favored for their rapid charging/discharging speed, good temperature stability and large power density. …
Ultrahigh charge-discharge efficiency and enhanced energy density of the sandwiched polymer nanocomposites with poly(methyl methacrylate…
Dielectric materials with ultrahigh energy densities are of importance in modern electric industry. However, for dielectric nanocomposites, their ultrahigh energy densities were typically achieved at the expense of low charge-discharge efficiencies (η) of 60%–70% at high electric fields, which is not desirable for practical applications.
Significantly increased energy density and discharge efficiency at high temperature in polyetherimide nanocomposites by …
The 1 vol% PEI/AO-nps nanocomposite exhibits excellent capacitive performance, e.g., a discharge energy density of 3.70 J cm −3 with a charge–discharge efficiency of 90.1% evaluated at 500 MV m −1 and 150 C, which is the maximal value compared with
Crosslinked fluoropolymers exhibiting superior high-temperature energy density and charge–discharge efficiency
The electrification of transport requires dielectric materials capable of operating efficiently at high temperatures to meet the increasing demand of electrical energy storage at extreme conditions. Current high-temperature dielectric polymers rely on the incorporation of wide bandgap inorganic fillers to restrain electrical conduction and …
Ultrahigh discharge efficiency and improved energy density in polymer-based nanocomposite for high-temperature capacitors application …
The discharge energy density (U d) also reached the maximum of 3.12 J/cm 3 at 150 C, and the charge-discharge efficiency (η) was 69.4% when the feeding content of Cu 2+ of 20% mol. It is worth mentioning that the form of coordination bond making Cu 2+ occupies the position of the lone pair electron, which effectively improved …
An alternating multilayer architecture boosts ultrahigh energy density and high discharge efficiency …
Introduction The rapid development of electronic technology worldwide has resulted in more requirements for the storage of electric energy in electronic devices, and thus increasing attention has been paid to improve energy efficiency. 1–3 Among the major energy storage devices, electrostatic capacitors have an ultrahigh power density and high …
Enhanced energy storage density and discharge efficiency in potassium sodium niobite-based ceramics …
The development of lead-free ceramics with high recoverable energy density (W rec) and high energy storage efficiency (η) is of great significance to the current energy situation this work, a new scheme was proposed to improve the W rec and η of potassium sodium niobate ((K, Na)NbO 3, abbreviated as KNN) lead-free ceramics. ...
High energy density and discharge efficiency polypropylene …
Here we demonstrate that the discharged energy density ( Ue) of PP film could be largely increased from 1.40 J/cm 3 of pure PP film to 3.86 J/cm 3 of PP …
Ultrahigh Energy Storage Density and Efficiency in …
Ultrahigh energy storage density, high efficiency and superior thermal stability in Bi 0.5 Na 0.5 TiO 3 -based relaxor ferroelectric ceramics via constructing multiphase structures. Journal of …
Ultrahigh discharge efficiency and excellent energy density in …
A comprehensive energy storage performance with ultrahigh efficiency of 90% and outstanding density of 11.3 J/cm 3 is simultaneously achieved in PEI/BaTiO 3 …
Enhanced energy storage density and efficiency in lead-free …
The energy storage efficiency is not high, but the energy storage density is large and the discharge speed is fast. Taking all into consideration, antiferroelectrics are not conducive to the research of new …
Giant Energy Density and Improved Discharge Efficiency of …
Giant Energy Density and Improved Discharge Efficiency of Solution-Processed Polymer Nanocomposites for Dielectric Energy Storage. Xin Zhang,Yang Shen,Ben …
Giant energy-storage density with ultrahigh efficiency in lead-free …
The KNN-H ceramic exhibits excellent comprehensive energy storage properties with giant Wrec, ultrahigh η, large Hv, good temperature/frequency/cycling …
Ultrahigh Energy Storage Density and Efficiency in …
Environmentally friendly lead-free dielectric ceramics have attracted wide attention because of their outstanding power density, rapid charge/dischargerate, and superior stability. Nevertheless, as a hot …
Ultrahigh energy storage density and efficiency in PLZST …
Antiferroelectric (AFE) ceramic materials possess ultrahigh energy storage density due to their unique double hysteresis characteristics, and PbZrO 3 is one of the promising systems, but previous materials still suffer from the problem that energy storage density and energy storage efficiency can hardly be improved synergistically.
Enhanced energy density of PVDF-based nanocomposites via a …
Zhang, X. et al. Giant energy density and improved discharge efficiency of solution-processed polymer nanocomposites for dielectric energy storage. Adv. Mater. 28, 2055–2061 (2016).
Concurrently Achieving High Discharged Energy Density and …
Recent studies have demonstrated that linear/nonlinear layered composites, which can effectively balance energy density and efficiency, have huge potential for capacitive …
High-Energy-Density Ferroelectric Polymer Nanocomposites for Capacitive Energy Storage: Enhanced Breakdown Strength and Improved Discharge Efficiency
PVDF-based polymers have garnered significant attention in the field of high-power density electrostatic capacitors due to their exceptional dielectric strength. However, their practical applications are constrained by low charge-discharge efficiency (η) and energy storage density (U e), which stem from high ferroelectric relaxation and …
Significant Energy Density of Discharge and Charge–Discharge Efficiency …
This discharge energy density is the highest reported until now when charge–discharge efficiency of ≥80% is considered as the threshold. In-depth analysis revealed that comparatively higher D max – D r (i.e., 4.7 μC/cm 2 ), as well as the utmost breakdown strength (i.e., 510 MV/m), assisted in achieving this relatively higher …
The ultrahigh discharge efficiency and energy density …
Poly(vinylidene fluoride) (PVDF) based fluoropolymers possess high permittivity and breakdown strength (Eb), and have been extensively studied because of their dielectric applications. However, their practical …
Simultaneously achieving high discharge energy density and discharge efficiency …
For example, an ultra-high discharge energy density and charge-discharge efficiency of 34.6 and 62 % are yielded in the 7 layered composites. For the first time, we prove that making use of the composites approach involving in MXene and BNNS and topological-structure modulations, one can simultaneously realize the high discharge …
All-organic sandwich-structured BOPP/PVDF/BOPP dielectric films with significantly improved energy density and charge–discharge efficiency ...
For instance, the optimal epoxy film showed an energy storage density of 7.06 J cm –3 and 85% charge-discharge efficiency at room temperature and 420 kV mm –1. At 200 kV mm –1 and 110 °C, a working condition for the application of the electric vehicle, the prepared film still showed an energy storage density of 1.5 J cm –3 and …
High energy density and superior charge/discharge efficiency …
For next-generation energy storage capacitors, polymer dielectrics with high U e and charge/discharge efficiency (η) are thus highly desirable. According to the energy storage equation of linear dielectric materials, i.e., U e = 0.5 ε 0 ε r E 2, the U e can be improved by enhancing the dielectric constant ( ε r ) and the electric field ( E ).
Simultaneously enhanced energy density and discharge efficiency …
By reasonable designing the dielectric the layer-structured nanocomposites, 0.5-8-0.5 exhibit a high discharge density of 20.1 J/cm 3 and high efficiency of 76% under 507 MV/m, showing a simultaneous improvement of high energy density and high efficiency. In
Improved Energy Density and Charge Discharge Efficiency of Polypropylene Capacitor Film …
The maximum energy storage density goes up from 1.45 to 2.77 J/cm 3 at 85 C. The surface-grafted BOPP film exhibits outstanding energy density and charge-discharge efficiency characteristics. This research provides a theoretical reference for improving the performance of capacitor film based on surface modification.
Simultaneously realizing ultrahigh energy storage density and efficiency …
Dielectric capacitors have advantages over other energy storage devices (e.g., lithium ion batteries, solid oxide fuel cells and electrochemical supercapacitors, etc.) including fast charge-discharge speed (∼μs), high power density (up to 10 3 …
All-polymeric multilayer para/ferroelectric dielectric films utilizing a gradient structure toward concurrent high discharge efficiency and energy ...
High-energy-density ferroelectric polymer nanocomposites for capacitive energy storage: enhanced breakdown strength and improved discharge efficiency Mater. Today, 29 ( 2019 ), pp. 49 - 67, 10.1016/j.mattod.2019.04.015
Sodium bismuth titanate-based perovskite ceramics with high energy storage efficiency and discharge …
It can be calculated from the figure that it reaches a brilliant energy storage efficiency of 91.3% and a higher energy storage density of 1.26 J/cm 3 at 160 kV/cm. In addition, as shown in Fig. 8 a, it still maintains high frequency stability (10 Hz–500 Hz), which W rec drops by less than 10%, and η drops by less than 4% in all frequency ranges (in …
Bilayer-structured nanocomposites with ultrahigh energy density and large discharge efficiency at high temperature via balancing energy storage ...
Introduction The growing demand for electrical energy is driving the progress of new equipment for energy harvesting, conversion, and storage. Among current energy storage devices, dielectric capacitors can provide large power density (∼10 7 –10 8 W kg −1) due to their rapid charge–discharge rate (<1 μs), making them suitable for …
Simultaneously achieving high energy storage and charge-discharge …
Dielectric capacitors have been extensively studied in electronic and power systems based on their high power density and ultra-fast discharge rates. In this study, the dielectric, energy storage and charge-discharge properties of Sr 0.7 Bi 0.2 TiO 3-based lead-free relaxor ferroelectric ceramic were investigated. ...
Multilayered ferroelectric polymer films incorporating low-dielectric-constant components for concurrent enhancement of energy density …
PVDF-based polymers have garnered significant attention in the field of high-power density electrostatic capacitors due to their exceptional dielectric strength. However, their practical applications are constrained by low charge-discharge efficiency (η) and energy storage density (U e), which stem from high ferroelectric relaxation and …
Intrinsic-designed polyimide dielectric materials with large energy storage density and discharge efficiency …
Polymer dielectric materials with excellent temperature stability are urgently needed for the ever-increasing energy storage requirements under harsh high-temperature conditions. In this work, a novel diamine monomer (bis(2-cyano-4-aminophenyl)amine) was successfully synthesized to prepare a series …
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