# Ceramic-Based Dielectric Materials for Energy Storage Capacitor Applications

## TL;DR

This paper reviews ceramic-based dielectric materials for energy storage capacitors, focusing on their properties and strategies to improve performance.

## Contribution

The paper provides a comprehensive review of recent progress and strategies in ceramic dielectrics for energy storage applications.

## Key findings

- Ceramic-based dielectrics offer high power density and temperature stability for energy storage.
- Strategies like chemical modification and microstructure refinement enhance energy storage performance.
- The review highlights challenges and future opportunities in dielectric materials for capacitors.

## Abstract

Materials offering high energy density are currently desired to meet the increasing demand for energy storage applications, such as pulsed power devices, electric vehicles, high-frequency inverters, and so on. Particularly, ceramic-based dielectric materials have received significant attention for energy storage capacitor applications due to their outstanding properties of high power density, fast charge–discharge capabilities, and excellent temperature stability relative to batteries, electrochemical capacitors, and dielectric polymers. In this paper, we present fundamental concepts for energy storage in dielectrics, key parameters, and influence factors to enhance the energy storage performance, and we also summarize the recent progress of dielectrics, such as bulk ceramics (linear dielectrics, ferroelectrics, relaxor ferroelectrics, and anti-ferroelectrics), ceramic films, and multilayer ceramic capacitors. In addition, various strategies, such as chemical modification, grain refinement/microstructure, defect engineering, phase, local structure, domain evolution, layer thickness, stability, and electrical homogeneity, are focused on the structure–property relationship on the multiscale, which has been thoroughly addressed. Moreover, this review addresses the challenges and opportunities for future dielectric materials in energy storage capacitor applications. Overall, this review provides readers with a deeper understanding of the chemical composition, physical properties, and energy storage performance in this field of energy storage ceramic materials.