Work

Defect-engineered core-shell structured NaNbO3-based energy storage ceramics

Year: 2025

Type: article

Abstract: As research on lead−free energy storage materials advances, high−performance substrates and their modification methods have been continuously explored. In NaNbO 3 –based energy storage ceramics, low polarization limits the enhancement of energy storage performance. This study utilized defect engineering design to prepare (1– x )NaNbO 3 - x Sr(Fe 1/3 Sb 2/3 )O 3 ceramics with core–shell structure through a Fe/Sb dual oxidation state variable element synergistic regulation strategy. The goal is to enhance Δ P and optimize E b of ceramics by adjusting the content of vacancy defects and phase structure, so that ceramics can achieving high energy storage characteristics. A W rec of 6.4 J/cm 3 and η of 80% at 645 kV/cm were achieved in NaNbO 3 –based ceramic. Additionally, based on this study, we performed a detailed analysis of the origin of high Δ P and the influence of defect structures on E b , with the aim of providing a new reference for development and research of high–performance lead–free energy storage ceramics.

Source: Journal of Materiomics

DOI: 10.1016/j.jmat.2025.101097