Research Advances in Hierarchically Structured PVDF-Based All-Organic Composites for High-Energy Density Capacitors

Abstract

Polymer film capacitors have been widely applied in many pulsed power fields owing to their fastest energy-released rates. The development of ferroelectric polyvinylidene fluoride (PVDF)-based composites has become one of the hot research directions in the field of high-energy storage capacitors. Recently, hierarchically-structured all-organic composites have been shown to possess excellent comprehensive energy storage performance and great potential for application. In this review, most research advances of hierarchically-structured all-organic composites for the energy storage application are systematically classified and summarized. The regulating strategies of hierarchically structured all-organic composites are highlighted from the perspective of preparation approaches, tailored material choices, layer thicknesses, and interfaces. Systematic comparisons of energy storage abilities are presented, including electric displacement, breakdown strength, energy storage density, and efficiency. Finally, we present the remaining problems of hierarchically structured all-organic composites and provide an outlook for future energy storage applications.

Strategies Involved in Enhancing the Capacitive Energy Storage Characteristics of Poly(vinylidene fluoride) Based Flexible Composites

“…Though there are some interesting review articles regarding the dielectric and energy storage characteristics of flexible energy storage devices, [128–137] the review articles on particularly PVDF based composites are very less in numbers [14] . Some research groups have already reviewed the current trend of research on PVDF‐based composites focusing on dielectric, [129] mechanical energy harvesting, piezoelectric vibration sensing, and many other applications [138–147] . Detail energy storage characteristics of ferroelectric polymer‐based composites have also been previously reviewed by other researchers [15,16,148] .…”