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Nanostructures and dielectric properties of PVDF-based polymer films with high energy density and low energy losses

Published online by Cambridge University Press:  02 March 2015

Masahiko Ando ,
Naoki Yoshimoto ,
Yuichiro Yoshitake ,
Shuji Kato ,
Hidekazu Kodama ,
Takeo Furukawa  and
Koji Tashiro
Masahiko Ando
Affiliation:
Central Research Laboratory, Hitachi, Ltd., Omika 7-1-1, Hitachi, Ibaraki 319-1292, Japan
Naoki Yoshimoto
Affiliation:
Central Research Laboratory, Hitachi, Ltd., Omika 7-1-1, Hitachi, Ibaraki 319-1292, Japan
Yuichiro Yoshitake
Affiliation:
Hitachi Research Laboratory, Hitachi, Ltd., Omika 7-1-1, Hitachi, Ibaraki 319-1292, Japan
Shuji Kato
Affiliation:
Hitachi Research Laboratory, Hitachi, Ltd., Omika 7-1-1, Hitachi, Ibaraki 319-1292, Japan
Hidekazu Kodama
Affiliation:
Kobayasi Institute of Physical Research, 3-20-41 Higashi-Motomachi, Kokubunji, Tokyo 185-0022, Japan
Takeo Furukawa
Affiliation:
Kobayasi Institute of Physical Research, 3-20-41 Higashi-Motomachi, Kokubunji, Tokyo 185-0022, Japan
Koji Tashiro
Affiliation:
Toyota Technological Institute, 2-12-1 Hisakata,Tempaku, Nagoya 468-8551, Japan
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Abstract

Based on the investigation of mechanism for large dielectric losses in relaxor fluorinated polymers, polyvinylidene fluoride (PVDF) derivatives, a new nanostructure-controlled PVDF based polymer films with low dielectric loss, tanδ < 1% (0.6%), and high dielectric constant, εr = 13 at frequency of 1 kHz, was proposed for electrical energy storage applications. The high dielectric loss was mainly due to the electric-field induced α-β phase transition, and one dimensional extension of P(VDF-TrFE)-g-PEMA films was found to reduce the α phase component resulting in reduction of the dielectric loss while keeping the high dielectric constant. In-situ FTIR measurements suggested a possibility of further reducing the dielectric-loss.

Keywords

energy storagepolymerdielectric
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1740: Symposium Z – Materials Challenges for Energy Storage across Multiple Scales , 2015 , mrsf14-1740-z09-23
Copyright
Copyright © Materials Research Society 2015 

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References

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