Giant electrocaloric effect in ferroelectric poly(vinylidenefluoride- trifluoroethylene) copolymers near a first-order ferroelectric transition

Xinyu Li, Xiao Shi Qian, Haiming Gu, Xiangzhong Chen, S. G. Lu, Minren Lin, Fred Bateman, Q. M. Zhang

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    60 Scopus citations

    Abstract

    We present directly measured electrocaloric effect (ECE) from the poly(vinylidenefluoride-trifluoroethylene) 65/35mol. % copolymer. The data reveal a large difference in the ECE between that measured in applying and in removing the electric field. The difference is significantly reduced by modifying the copolymer with 20 Mrad of high energy electron irradiation. Moreover, an isothermal entropy change ΔSint=160J kg -1 K-1 and an adiabatic temperature change ΔT int=35°C can be induced in the irradiated copolymer. These results demonstrate the promise of achieving a significant ECE in ferroelectric polymers near first-order ferroelectric-paraelectric transition where multiple intermediate phases can exist.

    Original languageEnglish (US)
    Article number132903
    JournalApplied Physics Letters
    Volume101
    Issue number13
    DOIs
    StatePublished - Sep 24 2012

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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