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Novel Polar-fluoropolymer Blends with Tailored Nanostructures for High Energy Density and Low Loss Capacitor Applications

Published online by Cambridge University Press:  22 February 2012

Shan Wu
Affiliation:
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802
Minren Lin
Affiliation:
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802
David S-G. Lu
Affiliation:
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802
Lei Zhu
Affiliation:
Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44016
Q. M. Zhang
Affiliation:
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802
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Abstract

Dielectric polymers with high energy density with low loss at high electric fields are highly desired for many energy storage and regulation applications. A polar-fluoropolymer blend consisting of a high energy density polar-fluoropolymer of poly(vinylidene fluoride-chlorotrifluoroethylene) (P(VDF-CTFE)) with a low dielectric loss polymer of poly(ethylene-chlorotrifluoroethylene) (ECTFE) was developed and investigated. We show that the two polymers are partially miscible which leads to blends with high energy density and low loss. Moreover, by introducing crosslinking to further tailor the nano-structures of the blends a markedly reduction of losses in the blend films at high field can be achieved. The crosslinked blend films show a dielectric constant of 7 with a dielectric loss of 1% at low field. Furthermore, the blends maintain a high energy density and low loss (∼3%) at high electric fields (> 250 MV/m).

Type
Research Article
Copyright
Copyright © Materials Research Society 2012

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References

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