Superior high-temperature discharged energy densities in comparison to those of the current dielectric polymers have been demonstrated in the crosslinked fluoropolymers

Ai, Ding

Gadinski, Matthew R

Han, Zhubing

Huang, Yuqi

Li, He

Ren, Lulu

Wang, Qing

Yao, Bin

Zhou, Yao

English

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 achieve high efficiencies at elevated temperatures. Here, we report a new class of all-polymer based high-temperature dielectric materials prepared from crosslinking of melt-processable fluoropolymers. The crosslinked polymers exhibit larger discharged energy densities and greater charge-discharge efficiencies along with excellent breakdown strength and cyclic stability at elevated temperatures when compared to the current dielectric polymers. The origins of the marked improvement in the high-temperature capacitive performance are traced to efficient charge-trapping by a range of the molecular trapping centers resulting from the crosslinked structures. In addition, the implementation of melt-extrudable polymers would enable scalable processing that is compatible with the current fabrication techniques used for polymer dielectrics, which is in sharp contrast to the dielectric polymer composites with inorganic fillers

eScholarship - University of California

Crosslinked fluoropolymers exhibiting superior high-temperature energy density and charge–discharge efficiency

https://escholarship.org/content/qt4g36288k/qt4g36288k.pdf?t=q7eugp

Crosslinked fluoropolymers exhibiting superior high-temperature energy density and charge-discharge efficiency

Crosslinked fluoropolymers exhibiting superior high-temperature energy density and charge-discharge efficiency

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eScholarship - University of California