Flexible Nanodielectric Materials with High Permittivity for Power Energy Storage

TLDR

Flexible nanodielectric materials (FNDMs) with high permittivity are a leading research area, promising as energy‑storage layers in high‑performance capacitors, and their properties depend on nanoparticle characteristics and their interactions with flexible polymer matrices. The review aims to outline key issues in the nanodielectric field and highlight recent advances in fabricating FNDMs with tailored constituents, molecular structures, and microstructures. It analyzes persistent challenges and summarizes general strategies to achieve FNDMs with superior integrated properties. The review showcases exciting examples of FNDMs applied to power‑energy‑storage devices.

Abstract

Study of flexible nanodielectric materials (FNDMs) with high permittivity is one of the most active academic research areas in advanced functional materials. FNDMs with excellent dielectric properties are demonstrated to show great promise as energy‐storage dielectric layers in high‐performance capacitors. These materials, in common, consist of nanoscale particles dispersed into a flexible polymer matrix so that both the physical/chemical characteristics of the nanoparticles and the interaction between the nanoparticles and the polymers have crucial effects on the microstructures and final properties. This review first outlines the crucial issues in the nanodielectric field and then focuses on recent remarkable research developments in the fabrication of FNDMs with special constitutents, molecular structures, and microstructures. Possible reasons for several persistent issues are analyzed and the general strategies to realize FNDMs with excellent integral properties are summarized. The review further highlights some exciting examples of these FNDMs for power‐energy‐storage applications.