High energy density capacitors for pulsed power applications

MacDougall, F.W.; Ennis, J.B.; Yang, Xiaolong; Cooper, Robert; Gilbert, John E.; Bates, J.; Naruo, C.; Schneider, Mark; Keller, Nathan; Joshi, Shama; Jow, T. Richard; Ho, Janet; Scozzie, Charles; Yen, S. P. S.

doi:10.1109/ppc.2009.5386359

Cited by 21 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Today's electronics are involved in many vital functions of everyday life and capacitors serve key roles in these devices. [1][2][3][4] Because of miniaturization and increased energy consumption in such applications, new dielectric materials must be developed with higher energy density while maintaining low loss of that energy. 1,4 Considerable research has been devoted to polymeric dielectric materials due to their ease of manufacturing, high breakdown strength, low loss, and self-clearing capabilities.…”

Section: Introductionmentioning

confidence: 99%

Fluorinated poly(arylene ether ketone)s for high temperature dielectrics

Shaver

Yin

Borjigin

et al. 2016

Polymer

View full text Add to dashboard Cite

There is a need for polymeric capacitors with improved energy storage density and thermal stability. In this work, the effect of polymer molecular structure and symmetry on T g , breakdown strength, and relative permittivity were investigated. A systematic series of four amorphous poly(arylene ether ketone)s were compared. Two of the polymers had symmetric bisphenols while the remaining two had asymmetric bisphenols. Two contained trifluoromethyl groups while the other two had methyl groups. The symmetric polymers had T g 's of approximately 160 o C while the asymmetric polymers showed higher T g 's near 180 o C. The symmetric polymers had breakdown strengths near 380 kV/mm at 150 o C. The asymmetric counterparts had breakdown strengths near 520 kV/mm even at 175 o C, with the fluorinated polymers performing slightly better in both cases. The non-fluorinated polymers had higher relative permittivities than the fluorinated materials, with the asymmetric polymers being better in both cases.

show abstract

Section: Introductionmentioning

confidence: 99%

Fluorinated poly(arylene ether ketone)s for high temperature dielectrics

Shaver

Yin

Borjigin

et al. 2016

Polymer

View full text Add to dashboard Cite

show abstract

“… 10 , 35 In order to characterize the discharge performance of the capacitor, we define the time corresponding to 90% of the maximum discharge energy in the figure as the discharge time. 10 , 41 The experimental results are given in Figure 8 . It is discovered that the composite film releases the stored energy at a rate of microseconds, which is equal to the rate of release of BOPP (23 μs).…”

Section: Resultsmentioning

confidence: 99%

“…Figure 6d and Table S1 show the U discharged and η of selected polymers at elevated temperatures for comparision. 10,11,18,22,40,41 It can be observed that the U discharged of 40 vol % P-DB composite is larger than those of other polymers, and of critical importance are the high energy density of 8.7 J/cm 3 and η of 77%, which have been obtained at an elevated temperature of 90 °C at the same time. Therefore, we select the 40 vol % P-DB composite film for a further study of thermal stability.…”

Section: Resultsmentioning

confidence: 99%

Improving the Energy Density and Efficiency of the Linear Polymer PMMA with a Double-Bond Fluoropolymer at Elevated Temperatures

Wen

Zhu

et al. 2021

ACS Omega

View full text Add to dashboard Cite

A variety of applications can be found for high-temperature film capacitors, including energy storage components and pulsed power sources. In this work, in order to increase the energy density ( U e ), poly(vinylidene fluoride-chlorotrifluoroethylene-double bond) (P-DB) is introduced into poly(methyl methacrylate) (PMMA) to manufacture composite films by a solution casting process. In the case of the pure PMMA film, there is significant improvement in the polarization ( P max ) and breakdown field ( E b ) of the composite film. These improvements can effectively increase the U e of the composite film at room temperature and the elevated temperature. The results show that at an elevated temperature of 90 °C and at 350 MV/m, the U e of 40 vol % P-DB reaches 8.7 J/cm 3 , and the efficiency (η) of 77% is also considerable. Compared with biaxially oriented polypropylene (2.0 J/cm 3 ), the proposed film exhibits 4 times enhancement in the energy storage density, meaning that it can be an energy storage capacitor with huge potential at high temperatures.

show abstract

“…Recently, there has been a rising demand for high energy density capacitors due to the on-going electrification of transportation, communication and military and civilian systems. [33][34][35][36] A capacitor, consisting of a polarizable dielectric material in between two conductive metal plates (a schematic is shown in Figure 9.2), can rapidly discharge its stored energy. The maximum amount of energy that can be stored in the capacitor is proportional to the dielectric constant of the material, as well as the (square of) electric field at which it undergoes electrical or mechanical breakdown.…”

Section: Polymers As Capacitor Dielectricsmentioning

confidence: 99%

Rational Design of Polymer Dielectrics: An Application of Density Functional Theory and Machine Learning

Mannodi-Kanakkithodi

Ramprasad

2018

Computational Materials Discovery

View full text Add to dashboard Cite

Progress in materials science can benefit significantly from the use of modern computational and data-driven methods. Thus, in the present-day research environment, traditional trial-and-error type approaches to materials design are increasingly being replaced by computation-guided experimental design. The advent of materials informatics further adds a unique dimension with the application of state-of-the-art machine learning techniques on the generated data to yield accurate learning models. In this chapter, we describe a rational design approach centred around high-throughput computations, machine learning and targeted experimentation aimed at discovering new and advanced polymer dielectrics for energy storage capacitor applications. Density functional theory computations were performed on a few hundred polymers from a selected chemical space to estimate their dielectric constants and band gaps, two properties that provide useful initial screening criteria for capacitor dielectrics. Synthesis and characterization was done for a few screened candidates to validate the computations and provide initial promising candidates. Further, machine learning techniques were applied on the computational data to yield crucial correlations between polymer attributes and properties as well as regression-based property prediction models, which enabled swift expansion of knowledge to unexplored regions of the chemical space. Synthesis of many of the promising polymers thus identified, formation of thin films, impressive dielectric breakdown and loss characteristics, along with computationally validated and desirable dielectric constants and band gaps makes this a story of successful co-design of novel polymer dielectrics.

show abstract

High energy density capacitors for pulsed power applications

Cited by 21 publications

References 6 publications

Fluorinated poly(arylene ether ketone)s for high temperature dielectrics

Fluorinated poly(arylene ether ketone)s for high temperature dielectrics

Improving the Energy Density and Efficiency of the Linear Polymer PMMA with a Double-Bond Fluoropolymer at Elevated Temperatures

Rational Design of Polymer Dielectrics: An Application of Density Functional Theory and Machine Learning

Contact Info

Product

Resources

About