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

doi:10.1063/1.4756697

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

Electrical Engineering

Research output: Contribution to journal › Article › peer-review

80 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 ΔS_int=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 language	English (US)
Article number	132903
Journal	Applied Physics Letters
Volume	101
Issue number	13
DOIs	https://doi.org/10.1063/1.4756697
State	Published - Sep 24 2012

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4756697

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@article{de249129165b4438935f088569551e07,

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

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.",

author = "Xinyu Li and Qian, {Xiao Shi} and Haiming Gu and Xiangzhong Chen and Lu, {S. G.} and Minren Lin and Fred Bateman and Zhang, {Q. M.}",

note = "Funding Information: This research was supported in part (X. Li, X. Qian, and S. G. Lu) by the US DoE, Office of Basic Energy Sciences, Division of Materials Science and Engineering under Award No. DE-FG02-07ER46410 and in part by Army Research Office (X. Chen, M. Lin, and Q. M. Zhang) under Grant No. W911NF-11-1-0534. X. Chen was also supported in part by Nanjing University, China. We thank Z.-K. Liu for discussions.",

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month = sep,

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doi = "10.1063/1.4756697",

language = "English (US)",

volume = "101",

journal = "Applied Physics Letters",

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T1 - Giant electrocaloric effect in ferroelectric poly(vinylidenefluoride- trifluoroethylene) copolymers near a first-order ferroelectric transition

AU - Li, Xinyu

AU - Qian, Xiao Shi

AU - Gu, Haiming

AU - Chen, Xiangzhong

AU - Lu, S. G.

AU - Lin, Minren

AU - Bateman, Fred

AU - Zhang, Q. M.

N1 - Funding Information: This research was supported in part (X. Li, X. Qian, and S. G. Lu) by the US DoE, Office of Basic Energy Sciences, Division of Materials Science and Engineering under Award No. DE-FG02-07ER46410 and in part by Army Research Office (X. Chen, M. Lin, and Q. M. Zhang) under Grant No. W911NF-11-1-0534. X. Chen was also supported in part by Nanjing University, China. We thank Z.-K. Liu for discussions.

PY - 2012/9/24

Y1 - 2012/9/24

N2 - 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.

AB - 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.

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JF - Applied Physics Letters

IS - 13

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ER -

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

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