Nanostructures and dielectric properties of PVDF-based polymer films with high energy density and low energy losses. Issue 1740 (2015)

• Record Type: Journal Article
• Authors: Ando, Masahiko; Yoshimoto, Naoki; Yoshitake, Yuichiro; Kato, Shuji; Kodama, Hidekazu; Furukawa, Takeo; Tashiro, Koji
• Editors: Cresce, A.
• Is Part Of: MRS proceedings. Issue 1740:(2015)
• Publication Date: 2015
• Subjects: energy storage, -- polymer, -- dielectric; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2015.203
• Languages: English
• ISSNs: 0272-9172

Abstract

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.