Achieving High Energy Density in PVDF-Based Polymer Blends: Suppression of Early Polarization Saturation and Enhancement of Breakdown Strength

Xin Zhang, Yang Shen, Zhonghui Shen, Jianyong Jiang, Longqing Chen, Ce Wen Nan

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Polymers with high dielectric strength and favorable flexibility have been considered promising materials for dielectrics and energy storage applications, while the achievable energy density (Ue) of polymer is rather limited by the intrinsic low dielectric constant and ferroelectric hysteresis. Polyvinylidene fluoride-trifluoroethylene-chlorofluoroethylene (P(VDF-TrFE-CFE)) with ultrahigh ϵr of >50 is considered promising in achieving high Ue of polymer dielectrics. However, P(VDF-TrFE-CFE) only exhibits moderate Ue due to the early saturation of electrical polarization at low electric field. In this contribution, we show that, by blending P(VDF-TrFE-CFE) with polyvinylidene fluoride (PVDF), the early saturation of P(VDF-TrFE-CFE) is substantially suppressed, giving rise to concomitant enhancement of dielectric permittivity and breakdown strength. An ultrahigh energy density of 19.6 J/cm3 is thus achieved at ∼640 kV/mm, which is 1600% greater than Ue of the benchmark biaxially oriented polypropylene (BOPP, 1.2 J/cm3 at 640 kV/mm). Results of phase field simulations reveal that the interfaces between PVDF and P(VDF-TrFE-CFE) play a critical role by not only suppressing early saturation of electrical polarization in P(VDF-TrFE-CFE) but also inducing additional interfacial polarization. Binary phase diagram of P(VDF-TrFE-CFE)/PVDF blends is also systematically explored with their dielectric and energy storage behavior studied.

Original languageEnglish (US)
Pages (from-to)27236-27242
Number of pages7
JournalACS Applied Materials and Interfaces
Volume8
Issue number40
DOIs
StatePublished - Oct 12 2016

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Polymer blends
Polarization
Polymers
Energy storage
Permittivity
Polypropylenes
Ferroelectric materials
Phase diagrams
Hysteresis
Electric fields
polyvinylidene fluoride

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

@article{25f3478ac34c46db9475d70dee9d7fc2,
title = "Achieving High Energy Density in PVDF-Based Polymer Blends: Suppression of Early Polarization Saturation and Enhancement of Breakdown Strength",
abstract = "Polymers with high dielectric strength and favorable flexibility have been considered promising materials for dielectrics and energy storage applications, while the achievable energy density (Ue) of polymer is rather limited by the intrinsic low dielectric constant and ferroelectric hysteresis. Polyvinylidene fluoride-trifluoroethylene-chlorofluoroethylene (P(VDF-TrFE-CFE)) with ultrahigh ϵr of >50 is considered promising in achieving high Ue of polymer dielectrics. However, P(VDF-TrFE-CFE) only exhibits moderate Ue due to the early saturation of electrical polarization at low electric field. In this contribution, we show that, by blending P(VDF-TrFE-CFE) with polyvinylidene fluoride (PVDF), the early saturation of P(VDF-TrFE-CFE) is substantially suppressed, giving rise to concomitant enhancement of dielectric permittivity and breakdown strength. An ultrahigh energy density of 19.6 J/cm3 is thus achieved at ∼640 kV/mm, which is 1600{\%} greater than Ue of the benchmark biaxially oriented polypropylene (BOPP, 1.2 J/cm3 at 640 kV/mm). Results of phase field simulations reveal that the interfaces between PVDF and P(VDF-TrFE-CFE) play a critical role by not only suppressing early saturation of electrical polarization in P(VDF-TrFE-CFE) but also inducing additional interfacial polarization. Binary phase diagram of P(VDF-TrFE-CFE)/PVDF blends is also systematically explored with their dielectric and energy storage behavior studied.",
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Achieving High Energy Density in PVDF-Based Polymer Blends : Suppression of Early Polarization Saturation and Enhancement of Breakdown Strength. / Zhang, Xin; Shen, Yang; Shen, Zhonghui; Jiang, Jianyong; Chen, Longqing; Nan, Ce Wen.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 40, 12.10.2016, p. 27236-27242.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Achieving High Energy Density in PVDF-Based Polymer Blends

T2 - Suppression of Early Polarization Saturation and Enhancement of Breakdown Strength

AU - Zhang, Xin

AU - Shen, Yang

AU - Shen, Zhonghui

AU - Jiang, Jianyong

AU - Chen, Longqing

AU - Nan, Ce Wen

PY - 2016/10/12

Y1 - 2016/10/12

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AB - Polymers with high dielectric strength and favorable flexibility have been considered promising materials for dielectrics and energy storage applications, while the achievable energy density (Ue) of polymer is rather limited by the intrinsic low dielectric constant and ferroelectric hysteresis. Polyvinylidene fluoride-trifluoroethylene-chlorofluoroethylene (P(VDF-TrFE-CFE)) with ultrahigh ϵr of >50 is considered promising in achieving high Ue of polymer dielectrics. However, P(VDF-TrFE-CFE) only exhibits moderate Ue due to the early saturation of electrical polarization at low electric field. In this contribution, we show that, by blending P(VDF-TrFE-CFE) with polyvinylidene fluoride (PVDF), the early saturation of P(VDF-TrFE-CFE) is substantially suppressed, giving rise to concomitant enhancement of dielectric permittivity and breakdown strength. An ultrahigh energy density of 19.6 J/cm3 is thus achieved at ∼640 kV/mm, which is 1600% greater than Ue of the benchmark biaxially oriented polypropylene (BOPP, 1.2 J/cm3 at 640 kV/mm). Results of phase field simulations reveal that the interfaces between PVDF and P(VDF-TrFE-CFE) play a critical role by not only suppressing early saturation of electrical polarization in P(VDF-TrFE-CFE) but also inducing additional interfacial polarization. Binary phase diagram of P(VDF-TrFE-CFE)/PVDF blends is also systematically explored with their dielectric and energy storage behavior studied.

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