Electrical breakdown and ultrahigh electrical energy density in poly(vinylidene fluoride-hexafluoropropylene) copolymer

Zhou, Xin; Zhao, Xuanhe; Suo, Zhigang; Zou, Chen; Runt, James; Liu, Sheng; Zhang, Shihai; Zhang, Q. M.
April 2009
Applied Physics Letters;4/20/2009, Vol. 94 Issue 16, p162901
Academic Journal
This paper investigates the electrical breakdown of a polar fluoropolymer, poly(vinylidene fluoride-hexafluoropropylene) which exhibits an exceptionally high discharged electrical energy density (>25 J/cm3). It is shown that above room temperature, the breakdown strength decreases with temperature. It is further shown that such a temperature dependence of breakdown strength is consistent with the electromechanical breakdown model by taking into consideration of the plastic deformation of semicrystalline polymers.


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