Jump to main content
Jump to site search


Developing a novel high performance NaNbO3-based lead-free dielectric capacitor for energy storage applications

Author affiliations

Abstract

The development of dielectric capacitors with high recoverable energy density, high energy storage efficiency, short discharge time, and good temperature stability is of great importance for meeting the demands of integration and miniaturization of energy storage devices. Learning from the advantages of relaxor ferroelectrics for energy storage applications and the relationship between their grain size and breakdown strength, we develop a novel lead-free NaNbO3-based (xBa0.6(Bi0.5K0.5)0.4TiO3–(1 − x)NaNbO3, abbreviated as xBBKT–NN) relaxor ferroelectric in this study. The XRD results reveal that the average structure of xBBKT–NN ceramics belongs to the pseudo-cubic phase due to cation disorder distribution. All compositions display a fine-grain microstructure and relaxor ferroelectric characteristics. The composition with x = 0.32 shows optimal comprehensive energy storage properties, including the highest recoverable energy density of 2.75 J cm−3 and a favorable energy storage efficiency of 78.3%. The improvement of energy storage properties is mainly related to the enhanced relaxor behavior. Additionally, pulse charge–discharge analysis was also carried out to estimate the practical discharge performance of the x = 0.32 ceramic. An extremely short discharge time (<100 ns) and relatively high thermal stability (20–100 °C) were also observed in the x = 0.32 ceramic. These results not only show that the lead-free xBBKT–NN ceramics are a novel relaxor ferroelectric for energy storage applications, but also demonstrate that a combination of fine-grain engineering and relaxor behavior is an effective method to develop high performance dielectric materials.

Graphical abstract: Developing a novel high performance NaNbO3-based lead-free dielectric capacitor for energy storage applications

Back to tab navigation

Supplementary files

Article information


Submitted
22 Sep 2019
Accepted
16 Nov 2019
First published
18 Nov 2019

Sustainable Energy Fuels, 2020, Advance Article
Article type
Paper

Developing a novel high performance NaNbO3-based lead-free dielectric capacitor for energy storage applications

M. Zhou, R. Liang, Z. Zhou and X. Dong, Sustainable Energy Fuels, 2020, Advance Article , DOI: 10.1039/C9SE00836E

Social activity

Search articles by author

Spotlight

Advertisements