What is it about?
We have developed all-organic dielectric films with both high breakdown strength and high permittivity from core-shell structured poly(vinylidene fluoride)-based copolymers fibers via coaxial electrospinning combined hot-pressing approach, which has unique advantage in elaborately adjusting the compositions of each polymer and their topological distribution. The resultant gradient polarization distribution leads to a significant improved energy storage capacity. Our simulation results from molecular level to microscale collaboratively confirm that polarization distribution adjustment is an effective strategy for high-performance electrostatic energy storage.
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Why is it important?
Our study demonstrates that all-organic nonlinear dielectric polymer blends are promising candidates and adjusting compositions and their topological distribution via coaxial electrospinning technique has great potential in large-scale, high-performance dielectric films fabrication towards high power capacitor application.
Perspectives
This work shall provide the community an alternative and effective strategy to precisely adjust the polarization so as to achieve both high energy density and power density as well as long-term reliability under operation conditions.
Yao Wang
Beihang University
Read the Original
This page is a summary of: Core–shell structured PVDF-based copolymer fiber design for high energy storage performance, Journal of Applied Physics, November 2022, American Institute of Physics,
DOI: 10.1063/5.0120895.
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