Effect of Composition on Polarization Hysteresis and Energy Storage Ability of P(VDF-TrFE-CFE) Relaxor Terpolymers

The temperature dependence of the dielectric permittivity and polarization hysteresis loops of P(VDF-TrFE-CFE) polymer films with different compositions are studied. Among them, the three compositions, 51.3/48.7/6.2, 59.8/40.2/7.3, and 70/30/8.1, are characterized for the first time. Relaxor behavio...

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Bibliographic Details
Published in:Polymers 2021-04, Vol.13 (8), p.1343
Main Authors: Hambal, Yusra, Shvartsman, Vladimir V, Lewin, Daniil, Huat, Chieng Huo, Chen, Xin, Michiels, Ivo, Zhang, Qiming, Lupascu, Doru C
Format: Article
Language:English
Subjects:
Charge efficiency
Composition effects
Cooling
Critical field (superconductivity)
Electric fields
Energy storage
Ferroelectricity
Flux density
Freezing
Glass substrates
Hysteresis loops
Phase transitions
Polarization
Polymer films
Polymers
Relaxors
Temperature
Temperature dependence
Terpolymers
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Summary:The temperature dependence of the dielectric permittivity and polarization hysteresis loops of P(VDF-TrFE-CFE) polymer films with different compositions are studied. Among them, the three compositions, 51.3/48.7/6.2, 59.8/40.2/7.3, and 70/30/8.1, are characterized for the first time. Relaxor behavior is confirmed for all studied samples. Increasing the CFE content results in lowering the freezing temperature and stabilizes the ergodic relaxor state. The observed double hysteresis loops are related to the field-induced transition to a ferroelectric state. The critical field corresponding to this transition varies with the composition and temperature; it becomes larger for temperatures far from the freezing temperature. The energy storage performance is evaluated from the analysis of unipolar polarization hysteresis loops. P(VDF-TrFE-CFE) 59.8/40.2/7.3 shows the largest energy density of about 5 J·cm (at the field of 200 MV·m ) and a charge-discharge efficiency of 63%, which iscomparable with the best literature data for the neat terpolymers.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym13081343