期刊
APPLIED PHYSICS LETTERS
卷 94, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3079332
关键词
crystallisation; dielectric polarisation; ferroelectric thin films; ferroelectricity; polymer blends; space charge
资金
- ONR [N00014-05-1-0338]
Although a high electric energy density was recently reported for defect-modified poly(vinylidene fluoride) (PVDF) copolymers at millisecond discharge, they usually deliver less energy at a high pulse rate. In this letter, a low loss polystyrene (PS) was grafted as side chains onto the P(VDF-chlorotrifluoroethylene) main chain. After PVDF crystallization, dielectric PS side chains were segregated to the crystalline-amorphous interface, forming a finite confinement layer for ferroelectric PVDF crystals. We speculated that less space charge was induced during electric poling because of the nanoscale confinement effect. Consequently, a fast discharge speed and a relatively high energy density were achieved.
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