Pushing dielectrics to the limit — Self-healing metalized film capacitors for high energy density

2017 ◽  
Author(s):  
R. M. Kerrigan ◽  
J. B. Ennis
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Self Healing

Conductive, self-healing and recyclable electrodes for dielectric elastomer generator with high energy density

2022 ◽  
Vol 429 ◽  
pp. 132258
Author(s):  
Wenpeng Zang ◽  
Xueying Liu ◽  
Junjie Li ◽  
Yingjie Jiang ◽  
Bing Yu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
Dielectric Elastomer ◽  
High Energy Density ◽  
Self Healing

Probing Confinement Effects on Multilayered Ferroelectric Polymer Films Using Second Harmonic Generation

2013 ◽  
Vol 1489 ◽  
Author(s):  
J. Jones ◽  
L. Zhu ◽  
N. Tolk ◽  
R. Mu
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Electrical Energy ◽  
High Energy ◽  
High Energy Density ◽  
Self Healing ◽  
Layered Systems

ABSTRACTElectrical energy storage plays a key role in mobile electronic devices, stationary power systems, and hybrid electrical vehicles. High energy density capacitors based on dielectric polymers are a focus of increasing research effort motivated by the possibility to realize compact and flexible energy storage devices, taking advantage of light weight and facile processability of organic materials. In addition, dielectric polymers enjoy inherent advantages of self-healing mechanism and high breakdown strength, leading to capacitors with great reliability and high energy density. It is the focus of this group to develop a multilayered ferroelectric PVDF system for improved energy storage efficiency. These systems are fabricated using enabling technology in co-extrusion which allows more cost effective and large area device production as opposed to more conventional layer-by-layer techniques. Many efforts have been made by the team to fabricate these micro- and nano-layered systems resulting in much improved device performance. A three-time improvement of capacitive electrical energy density has been demonstrated. The focus of this research is to understand the physics of why these multilayered systems perform better than a single layer by developing a characterization technique using both confocal second harmonic generation (SHG) and electric field induced second harmonic (EFISH) laser spectroscopy. Our results have shown that SHG is a very sensitive, non-destructive and versatile technique that can be used to study the ferroelectric and structural properties of layered systems. When combined with EFISH this technique allows the interrogation of structural and dielectric properties within the individual layers and at the interfaces between the layers. Further, the proposed techniques can be readily employed in-situ which can provide information in real time during sample processing with static and time-resolved spectroscopic measurements.

A self-healing Li-S redox flow battery with alternative reaction pathways

2021 ◽  
Author(s):  
Qiliang Chen ◽  
Wei Guo ◽  
Donghai Wang ◽  
Yongzhu Fu
Keyword(s):  
Energy Density ◽  
High Capacity ◽  
High Energy ◽  
High Energy Density ◽  
Reaction Pathways ◽  
Self Healing ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Redox Flow Batteries ◽  
Lithium Sulfur

Lithium-sulfur (Li-S) redox flow batteries (RFBs) have high energy density because of the high capacity of sulfur. To fully utilize its capacity, one key issue has to be overcome, i.e.,...

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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