In this paper, discharge and electrothermal efficiencies of a home-designed and manufactured two-electrode PSJ actuator working in single-shot mode and normal atmosphere are evaluated experimentally. The influence of circuit parameters and actuator configurations are investigated and analyzed as a reference for optimization.
However, the development of film capacitor towards high energy storage density is severely hindered by the low dielectric constant (ε) and low charge-discharge efficiency (η) of the polymeric films. The film of polypropylene (PP), the most used polymeric film with a market share of 50%, owns a high η due to its low inherent hysteresis loss.
Electrostatic capacitors with excellent energy storage capacity and great thermal stability have become the researching focus. However, high-energy–density electrostatic capacitors are restricted through insurmountable drawbacks of low charge–discharge efficiency under high temperature/voltage working conditions.
For superior performance capacitors, large discharge energy density along with high discharge efficiency, high power density, and ultrafast charging/discharging speed are desired.
However, the application of film capacitor in those high-power fields is severely hindered by its low energy storage density [6, 9, 10]. The energy storage density of a film capacitor is generally determined by the energy storage density of the dielectric polymer sandwiched between two electrodes.
Film capacitor, one typical type of electrostatic capacitors, exhibits its unique advantages in the high-power energy storage devices operating at a high electric field due to the high electrical breakdown strength (Eb) of the polymeric films.
A straightforward approach is replacing the non-polar PP with ferroelectric polymers, represented by poly (vinylidene fluoride) (PVDF) and its copolymers, as a novel dielectric layer for the high energy density film capacitors due to their high ε (~10.0) [, , ].
In this paper, discharge and electrothermal efficiencies of a home-designed and manufactured two-electrode PSJ actuator working in single-shot mode and normal atmosphere are evaluated experimentally. The influence of circuit parameters and actuator configurations are investigated and analyzed as a reference for optimization.
In this paper, discharge and electrothermal efficiencies of a home-designed and manufactured two-electrode PSJ actuator working in single-shot mode and normal …
Polymer dielectric materials, as ideal candidates for capacitors, suffer from deteriorated energy density because of their depressed dielectric constant and decreased breakdown strength at high temperatures, which become major …
high-efficiency, capacitor discharge. Description. Cabinet chassis structure, used to optimize circuit design, energy storage capacitors for high voltage oil-immersed power long life capacitor. Rigorous testing means power, Long working life, …
This paper focuses on the discharge efficiency of PVDF-based film capacitors and analyzes the discharge efficiency of PVDF-based film capacitors and a control group PP film capacitors using the voltammetric differential method. We have established a relevant test platform that can collect voltage and current data in real-time from the test ...
Importantly, a discharge energy density of 10.6 J/cm 3 with a high efficiency of 92% at 500 MV/m was achieved. The effective strategy revealed that the isolated stable radical in the low-polarity polymer matrix suppressed the energy loss and created a new paradigm for high-energy and low-loss flexible capacitors.
Dielectric polymer capacitors, especially those capable of operating efficiently at relatively low operating voltages, are urgently needed to meet the growing demands for miniaturization and reliability in advanced …
Electrostatic capacitors with excellent energy storage capacity and great thermal stability have become the researching focus. However, high-energy–density electrostatic …
Effective utilization of ultracapacitor for energy management and on-board power applications requires a thorough analysis of energy storage and delivery efficiency.
Electrostatic capacitors with excellent energy storage capacity and great thermal stability have become the researching focus. However, high-energy–density electrostatic capacitors are restricted through insurmountable drawbacks of low charge–discharge efficiency under high temperature/voltage working conditions. Herein, polyetherimide (PEI ...
capacitors (EDLCs) or ultracapacitors are electrochemical capacitors that have an unusually high energy density when compared to common capacitors, typically several orders of magnitude greater than a high-capacity electrolytic capacitor. The electric double-layer capacitor effect was first noticed in 1957 by General Electric engineers experimenting with devices using porous …
This paper focuses on the discharge efficiency of PVDF-based film capacitors and analyzes the discharge efficiency of PVDF-based film capacitors and a control group PP film capacitors …
Polymer dielectric materials, as ideal candidates for capacitors, suffer from deteriorated energy density because of their depressed dielectric constant and decreased breakdown strength at high temperatures, which become major barriers for their application in harsh environments.
Effective utilization of ultracapacitor for energy management and on-board power applications requires a thorough analysis of energy storage and delivery efficiency.
PDF | A technical note explaining the concepts of Coulombic efficiency, energy efficiency and effective capacitance of electrochemical capacitors. | Find, read and cite all the research you...
Capacitive discharge ignitions represent a quantum leap in ignition system performance compared to old inductive ignitions. By storing energy in capacitors and discharging it on demand, CD ignitions can generate extremely high voltages for stronger spark. This improved combustion drives more power and efficiency from your engine. In this deep dive, we will explore how […]
In a supercapacitor energy storage system, the highly efficient charge–discharge system based on series–parallel capacitor conversion proposed in this study would be extremely useful. A future problem is the …
However, the development of film capacitor towards high energy storage density is severely hindered by the low dielectric constant (ε) and low charge-discharge efficiency (η) of the polymeric films. The film of polypropylene (PP), the most used polymeric film with a market share of 50%, owns a high η due to its low inherent hysteresis loss.
For example, the discharged energy density of c-10%PEPA-PEI is up to 3.6 J/cm 3 at 500 MV/m and 150 °C, and its charge–discharge efficiency is 96.5%. However, the breakdown strength and charge–discharge efficiency of c-5%PEPA-PEI and c-20%PEPA-PEI are reduced compared with c-10%PEPA-PEI. It may be because the molecular chain length of 5 ...
For superior performance capacitors, large discharge energy density along with high discharge efficiency, high power density, and ultrafast charging/discharging speed are desired. Herein, we design and prepare new high quality nanocomposite films containing linear dielectric core–shell SrTiO 3 @Al 2 O 3 nanofibers (ST@AO NFs) and poly ...
Energy transfer aspects in a capacitor‐transfer‐type discharge excimer laser with automatic preionization (API) have been studied to improve the laser efficiency. Detailed measurements on the discharge and output characteristics of the XeCl laser show that efficient energy transfer from the storage capacitor to the discharge capacitor is essential for improvement in the overall …
In a supercapacitor energy storage system, the highly efficient charge–discharge system based on series–parallel capacitor conversion proposed in this study would be extremely useful. A future problem is the circuit design of series–parallel capacitor conversion.
Liu, B. et al. High energy density and discharge efficiency polypropylene nanocomposites for potential high-power capacitor. Energy Storage Mater. 27, 443–452 (2020). Article Google Scholar
For superior performance capacitors, large discharge energy density along with high discharge efficiency, high power density, and ultrafast charging/discharging speed are desired. Herein, we design and prepare new high quality …
A capacitor discharge is a situation that occurs when the electrical field from the voltage source around the capacitor goes down to zero, leading to an electron flow, which causes the potential difference between the two conductive plates to reach zero. This is possible when the charges of the two conductive plates are the same.
Volumetric efficiency is the amount of capacitance that can be provided within a given volume, and is expressed as a CV value where C is capacitance and V is voltage. A high CV is required for high volumetric efficiency. Tantalum dielectrics are known for their high CV properties. Optimizing the physical design of the capacitor, for example by maximizing the usable …
Dielectric polymer capacitors, especially those capable of operating efficiently at relatively low operating voltages, are urgently needed to meet the growing demands for miniaturization and reliability in advanced electronics and electrical power systems in automobiles and aerospace.
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