Open AccessRe-evaluation of the Energy Density Properties of VDF Ferroelectric Thin-Film Capacitors
Author(s) -
Naoto Tsutsumi,
Rikiya Tanaka,
Kenji Kinashi,
Wataru Sakai
Publication year - 2020
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.0c04112
Subject(s) - materials science , ferroelectricity , hysteresis , dielectric , electric field , electric displacement field , capacitor , antiferroelectricity , thin film , polarization (electrochemistry) , condensed matter physics , film capacitor , ferroelectric polymers , copolymer , polymer , composite material , optoelectronics , voltage , nanotechnology , piezoelectricity , electrical engineering , physics , chemistry , engineering , quantum mechanics
Large dielectric constants and small remanent polarization of the relaxor-ferroelectric (RFE) polymers are favored for energy-harvesting applications. Here, the energy harvesting of RFE thin films of vinylidene fluoride (VDF)-based terpolymers were re-evaluated. VDF-based terpolymers with trifluoroethylene (TrFE) and chlorofluoroethylene (CFE), CFE terpolymer, and those with TrFE and chlorotrifluoroethylene were used. Thermally annealed CFE terpolymer exhibited an energy density of 8.3 J cm -3 and an energy efficiency of 82% at a field of 280 MV m -1 . The high-energy efficiency was related to the narrow bipolar hysteresis of displacement ( D )-electric field ( E ) of the CFE terpolymer film. This narrow D - E hysteresis was a sum of the unipolar hysteresis directed toward the positive electric field region and that toward the negative electric field region, which suggested antiferroelectric-like behavior.
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