Metalized Polypropylene Film in Capacitors: Characterization and The Effect of Interfacial Pressure on the Dielectric Strength

1997 ◽  
Vol 476 ◽  
Author(s):  
Shalabh Tandon ◽  
Richard J. Farris
Keyword(s):  
Thermal Expansion ◽  
Energy Density ◽  
Dielectric Breakdown ◽  
Coefficient Of Thermal Expansion ◽  
Dielectric Strength ◽  
High Energy ◽  
High Energy Density ◽  
Polypropylene Film ◽  
Interfacial Pressure ◽  
Out Of Plane

AbstractMetalized polypropylene film used in high energy density capacitors has been mechanically characterized to determine its elastic constants. The out of plane coefficient of thermal expansion (CTE) of the orthotropic film is 10 times as large as the smaller in plane CTE. The out of plane modulus is twice as large compared to one of the in plane moduli. The effect of interfacial pressure on the dielectric breakdown is also studied for the same film. It is observed that the dielectric strength of the film decreases at first and then increases above 4 MPa of compressive stress.

Flexible BaTiO3/PVDF gradated multilayer nanocomposite film with enhanced dielectric strength and high energy density

2015 ◽  
Vol 3 (37) ◽  
pp. 9740-9747 ◽  
Author(s):  
Y. N. Hao ◽  
X. H. Wang ◽  
S. O'Brien ◽  
J. Lombardi ◽  
L. T. Li
Keyword(s):  
Energy Density ◽  
Dielectric Breakdown ◽  
Dielectric Strength ◽  
High Energy ◽  
Dielectric Constants ◽  
High Energy Density ◽  
Nanocomposite Films ◽  
High Dielectric ◽  
High Flexibility ◽  
Discharged Energy Density

BaTiO3/PVDF nanocomposite films with high flexibility and gradated BaTiO3 distribution structure are fabricated. These films show high dielectric constants of 20–25, a maximal discharged energy density value of 19.37 J cm−3 and dielectric breakdown strengths of up to 495 kV mm−1.

Modeling, characterization and evaluation of MU100 high-energy density ceramic nanodielectric for use in pulsed power applications

2017 ◽  
Author(s):  
◽  
Alexander B. Howard
Keyword(s):  
Energy Density ◽  
Dielectric Strength ◽  
High Energy ◽  
Pulsed Power ◽  
High Energy Density ◽  
Small Scale ◽  
University Of Missouri ◽  
High Dielectric ◽  
The University ◽  
Preparation And Evaluation

A high dielectric, nanodielectric, composite material, MU100, was developed by the University of Missouri for use in dielectric loaded antennas. Based on its dielectric strength and losses, MU100 had possible uses in the development for high energy-density capacitors. This work presents the theory behind, methods of preparation and evaluation, modeling and properties of MU100. MU100’s dielectric properties are explored in high energy-density pulsed power applications, compact high voltage capacitors. Small scale tests have shown the average dielectric strength of MU100 to be 225 kV/cm with a peak break down field of 328 kV/cm. When potted, these small-scale capacitors have lifetimes in excess of 800,000 discharges at 80% of their maximum rated field strength. This shows a remarkable development in the performance of high energy density capacitors for use in pulsed power applications.

Giant dielectric breakdown strength together with ultrahigh energy density in ferroelectric bulk ceramics via layer-by-layer engineering

2019 ◽  
Vol 7 (29) ◽  
pp. 17283-17291 ◽  
Author(s):  
Ziming Cai ◽  
Chaoqiong Zhu ◽  
Hongxian Wang ◽  
Peiyao Zhao ◽  
Yan Yu ◽  
...  
Keyword(s):  
Energy Density ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Layer Structure ◽  
High Energy ◽  
High Energy Density ◽  
Layer By Layer ◽  
Ultrahigh Energy ◽  
Dielectric Breakdown Strength ◽  
Giant Dielectric

A record-high breakdown strength (790 kV cm−1) and high energy density (5.04 J cm−3) are obtained in BTAS/BTBZNT ceramics with a layer-by-layer structure.

scholarly journals Correction: Flexible BaTiO3/PVDF gradated multilayer nanocomposite film with enhanced dielectric strength and high energy density

2015 ◽  
Vol 3 (39) ◽  
pp. 10316-10316 ◽  
Author(s):  
Y. N. Hao ◽  
X. H. Wang ◽  
S. O'Brien ◽  
J. Lombardi ◽  
L. T. Li
Keyword(s):  
Energy Density ◽  
Nanocomposite Film ◽  
Dielectric Strength ◽  
High Energy ◽  
High Energy Density

Correction for ‘Flexible BaTiO3/PVDF gradated multilayer nanocomposite film with enhanced dielectric strength and high energy density’ by Y. N. Hao et al., J. Mater. Chem. C, 2015, 3, 9740–9747.

A HIGH ENERGY DENSITY ZINC/OXYGEN BATTERY SYSTEM

1966 ◽  
Author(s):  
S. CHODOSH ◽  
E. KATSOULIS ◽  
M. ROSANSKY
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Battery System

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

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