Excellent Energy Storage Performance of Ferroconcrete-like All-Organic Linear/Ferroelectric Polymer Films Utilizing Interface Engineering

Yang Cui; Yu Feng; Tiandong Zhang; Changhai Zhang; Qingguo Chi; Yongquan Zhang; Xuan Wang; Qingguo Chen; Qingquan Lei

doi:10.1021/acsami.0c16197

Excellent Energy Storage Performance of Ferroconcrete-like All-Organic Linear/Ferroelectric Polymer Films Utilizing Interface Engineering

ACS Appl Mater Interfaces. 2020 Dec 16;12(50):56424-56434. doi: 10.1021/acsami.0c16197. Epub 2020 Dec 2.

Authors

Yang Cui^{1

2}, Yu Feng^{1

2}, Tiandong Zhang^{1

2}, Changhai Zhang^{1

2}, Qingguo Chi^{1

2}, Yongquan Zhang^{1

2}, Xuan Wang^{1

2}, Qingguo Chen^{1

2}, Qingquan Lei^{1

2}

Affiliations

¹ Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, P. R. China.
² School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, P. R. China.

PMID: 33327056
DOI: 10.1021/acsami.0c16197

Abstract

Ferroelectric polymers are regarded as the preferred material in dielectric energy storage devices because of their high dielectric constant. However, their relatively low breakdown strength and efficiency restrict their practical application. This work combines coaxial spinning and hot pressing to compound the highly insulating linear poly(methyl methacrylate) (PMMA) and ferroelectric poly(vinylidene fluoride) (PVDF) to obtain a PMMA/PVDF all-organic film with a ferroconcrete-like structure. Further, improvements in the energy storage performance over those of the pristine polymer were achieved via modulation of the PMMA to PVDF ratio. The 45% PMMA/PVDF film had an energy storage density of 17.7 J/cm³ and an energy efficiency of 73% at 640 kV/mm. Moreover, 51% PMMA/PVDF exhibited the best energy storage density (U = 20.7 J/cm³, η = 63% at 630 kV/mm). This work, therefore, provides a new idea for the design of all-organic polymer films for the field of energy storage.

Keywords: coaxial spinning; energy efficiency; energy storage density; ferroconcrete-like structure; linear/ferroelectric micro-interfaces.