High‐Performance Dielectric Ceramic Films for Energy Storage Capacitors: Progress and Outlook

TLDR

Dielectric capacitors store energy electrostatically and are prized for high power density and ultrashort discharge times, yet boosting their energy density and efficiency—particularly in ceramic films that excel in miniature power electronics—is a central research priority. The review seeks to comprehensively survey efforts to enhance the energy storage properties of linear, paraelectric, ferroelectric, relaxor ferroelectric, and anti‑ferroelectric ceramic films for pulsed power capacitor applications. The authors examine physical, chemical, and microstructural modification strategies applied to dielectric ceramic films to improve their energy storage performance.

Abstract

Abstract Dielectric capacitors, which store electrical energy in the form of an electrostatic field via dielectric polarization, are used in pulsed power electronics due to their high power density and ultrashort discharge time. In pursuit of developing high‐performance dielectric capacitors, special attention has been given to the improvement of their energy density and storage efficiency, which would make them useful for an even wider variety of applications. Among the different dielectric materials studied so far, including polymers, glasses, and both bulk and film‐based ceramics, dielectric ceramic films, which are of particular interest for miniature power electronics and mobile platforms, have demonstrated the greatest energy storage performances. In this regard, several interesting approaches involving physical, chemical, and microstructural modifications of the dielectric ceramic films are adopted. In addition to a brief discussion of the polymers, glasses, and ceramics used in dielectric capacitors and key parameters related to their energy storage performance, this review article presents a comprehensive overview of the numerous efforts made toward enhancing the energy storage properties of linear dielectric, paraelectric, ferroelectric, relaxor ferroelectric, and anti‐ferroelectric ceramic films for their applications in pulsed power capacitors.