Recent Advances in Multilayer‐Structure Dielectrics for Energy Storage Application

Abstract

An electrostatic capacitor has been widely used in many fields (such as high pulsed power technology, new energy vehicles, etc.) due to its ultrahigh discharge power density. Remarkable progress has been made over the past 10 years by doping ferroelectric ceramics into polymers because the dielectric constant is positively correlated with the energy storage density. However, this method often leads to an increase in dielectric loss and a decrease in energy storage efficiency. Therefore, the way of using a multilayer structure to improve the energy storage density of the dielectric has attracted the attention of researchers. Although research on energy storage properties using multilayer dielectric is just beginning, it shows the excellent effect and huge potential. In this review, the main physical mechanisms of polarization, breakdown and energy storage in multilayer structure dielectric are introduced, the theoretical simulation and experimental results are systematically summarized, and the preparation methods and design ideas of multilayer structure dielectrics are mainly described. This article covers not only an overview of the state-of-the-art advances of multilayer structure energy storage dielectric but also the prospects that may open another window to tune the electrical performance of the electrostatic capacitor via designing a multilayer structure.

Prediction of Energy Storage Performance in Polymer Composites Using High‐Throughput Stochastic Breakdown Simulation and Machine Learning

“…This also explains why current polymer‐based composite microstructure designs favor multilayer or gradient structures (through the possibility of falling dielectric mismatch between layers). [ 40 , 41 , 42 , 43 ]…”

“…This also explains why current polymer-based composite microstructure designs favor multilayer or gradient structures (through the possibility of falling dielectric mismatch between layers). [40][41][42][43] On the basis of the abovementioned simulation results, the blocking effect, filling effect, and dielectric matching, which can be adjusted by the three variables d, v, and 𝜖 r of filler, were found to be significant on the E b of the polymer-based composites. Through the high-throughput stochastic breakdown simulation results (Figures S4-S15, Supporting Information), the breakdown path evolution of polymer-based composites can be observed after adjusting the three variables, and a general rule can be obtained: in a specific range, the larger the d of the filler, the more appropriate filling state, and the closer 𝜖 r of fillers to the matrix, the E b of the polymer-based composite improvement is more significant.…”

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

“…In general, hot pressing [ 49 , 50 ], solution casting [ 51 , 52 ], and melt co-extrusion [ 53 ] technology can be used for preparing hierarchically structured all-organic composites. However, there are still some respective shortcomings of the above methods in preparing high-quality and large-scale films.…”

A Review on the Conventional Capacitors, Supercapacitors, and Emerging Hybrid Ion Capacitors: Past, Present, and Future

“…[ 47 ] Feng et al introduced the primary physical mechanisms about polarization, breakdown, and energy storage of multilayer structure dielectric, systematically summarized the theoretical simulation and experimental results, and described the synthesis approaches and design concepts about multilayer structure dielectrics. [ 48 ] In addition, the film capacitors have aroused intensive research interests owing to their higher dielectric strength and volumetric specific energy than their bulk counterparts and this is because the dielectric strength increases as the decreasing of dielectrics thickness. Ceramic film capacitors with the smallest footprint are particularly suitable for microelectronic systems, mobile platforms, and miniaturized power devices.…”