Optimizing sandwich-structured composites based on the structure of the filler and the polymer matrix: toward high energy storage properties. Issue 57 (16th October 2019)

• Record Type: Journal Article
• Authors: Cui, Yang; Wang, Xuan; Zhang, Tiandong; Zhang, Changhai; Chi, Qingguo
• Is Part Of: RSC advances. Volume 9:Issue 57(2019)
• Page Start: 33229
• Page End: 33237
• Publication Date: 2019-10-16
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra06256d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Inorganic composite fillers and sandwich-structured composite films have been designed for further increasing the energy storage density. Abstract : Polymer-based energy storage materials have been widely applied in the energy storage industry, such as in the hybrid electric vehicle and power-conditioning equipment, due to their moderate energy density and ultrafast charging/discharging speed. Accordingly, the improvement of the energy storage density of polymer matrix composites has become the focus of current research. In this study, different fillers ( e.g., 0.5Ba(Zr0.2 Ti0.8 )O3 –0.5(Ba0.7 Ca0.3 )TiO3 nanofibers (BCZT NFs), BCZT + Ag NFs and BCZT + Ag@Al2 O3 NFs) were synthesized via electrospinning and were added to the poly(vinylidene fluoride) (PVDF) matrix as a middle layer in sandwich-structure composites. The PVDF polymer-containing PMMA was prepared as the outer layer in the sandwich structure composites. These sandwich-structured composites have low loss, low current density, better breakdown strength and higher efficiency. In particular, 40% PMMA/PVDF/3 vol% BCZT + Ag@Al2 O3 /PVDF/40% PMMA/PVDF composites have an energy density of 7.23 J cm −3 and efficiency above 75.8% at 370 kV mm −1 . This article could open up a convenient and effective means for the practical application of power-pulsed capacitors by tuning the filler nanostructure and polymer nanocomposites.