Composition-Driven Polarization Distribution in Poly(vinylidene fluoride)-Based Copolymer Blends for High Power Density Capacitors

Xiao, Lianliang1,2,3; Liu, Zhigang3; Sun, Xindi2; Zhang, Lingyu2; Liu, Kaixin3; Zhang, Fengyuan3; Zheng, Yantao2; Xie, Shuhong1; Wang, Yao2

2023-04-01

10.1021/acsami.2c23154

ACS APPLIED MATERIALS & INTERFACES   影响因子和分区

1944-8244

1944-8252

High power density capacitors have been highly demanded in modern electronics and pulsed power systems. Yet the long-standing challenge that restricts achieving high power in capacitors lies in the inverse relationship between the breakdown strength and permittivity of TrFE) into the host poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) to produce PVDF-based copolymer blends, resulting in composition-driven 0-3 type microstructures, featuring nanospheres of P(VDF-TrFE) lamellar crystals dispersed homogeneously in a P(VDFHFP) matrix together with crystalline phase evolution from the y-phase to the a-phase. At the critical composition, the TrFE/HFP mole ratio is equal to 1, and the blend film achieves maximum energy storage performance with discharged energy density (Udis) similar to 24.3 J/cm3 at 607 MV/m. Finite element analyses reveal the relationship between microstructures, compositions, and the distribution of local electric field and polarization, which provide an in-depth understanding of the microscopic mechanism of the enhancement in energy storage capability of the blend films. More importantly, in a practical charge/discharge circuit, the blend film could deliver an ultrahigh energy density of 20.4 J/cm3, i.e., 88.3% of the total stored energy to 20 k omega load in 2.8 its (z0.9), resulting a high power density of 7.29 MW/ cm3, outperforming the reported dielectric polymer-based composites and copolymer films in both energy and power densities. The study thus demonstrates a promising strategy to develop high-performance dielectrics for high power capacitors.

blend polymer energy storage power density dielectric properties composition-driven evolution

SCI ; EI

英语

其他

National Natural Science Foundation of China["92066203","51872009"]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000974277800001

AMER CHEMICAL SOC

20231814040866

Dielectric materials ; Dielectric properties ; Electric fields ; Electric loads ; Fluorine compounds ; Inverse problems ; Microstructure ; Polarization ; Polymer films ; Storage (materials)

Energy Storage:525.7 ; Storage:694.4 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electric Power Systems:706.1 ; Dielectric Materials:708.1 ; Polymeric Materials:815.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

Web of Science

1.Xiangtan Univ, Key Lab Low Dimens Mat & Applicat Technol, Minist Educ, Xiangtan 411105, Peoples R China
2.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Xiao, Lianliang,Liu, Zhigang,Sun, Xindi,et al. Composition-Driven Polarization Distribution in Poly(vinylidene fluoride)-Based Copolymer Blends for High Power Density Capacitors[J]. ACS APPLIED MATERIALS & INTERFACES,2023,15(17):21403-21412.

Xiao, Lianliang.,Liu, Zhigang.,Sun, Xindi.,Zhang, Lingyu.,Liu, Kaixin.,...&Wang, Yao.(2023).Composition-Driven Polarization Distribution in Poly(vinylidene fluoride)-Based Copolymer Blends for High Power Density Capacitors.ACS APPLIED MATERIALS & INTERFACES,15(17),21403-21412.

Xiao, Lianliang,et al."Composition-Driven Polarization Distribution in Poly(vinylidene fluoride)-Based Copolymer Blends for High Power Density Capacitors".ACS APPLIED MATERIALS & INTERFACES 15.17(2023):21403-21412.