Issue 46, 2021

Ultrahigh energy density with excellent thermal stability in lead-free multilayer ceramic capacitors via composite strategy design

Abstract

Dielectric capacitors have received growing interest for application in advanced electrical and electronic systems. However, the low energy density and poor thermal stability at high temperature severely hinder their practical applications. Herein, novel relaxor ferroelectric 0.4((Bi0.5Na0.5)TiO3)-0.6(0.87BaTiO3-0.13Bi(Zn2/3(Nb0.85Ta0.15)1/3)O3) (0.4BNT-0.6BTBZNT) multilayer ceramic capacitors (MLCCs) with low-cost 70 Ag/30 Pd inner electrodes were prepared via composite strategy design. The 0.4BNT-0.6BTBZNT dielectric materials combine the complementary advantages of both BNT and BTBZNT and enable a great improvement of the maximum dielectric constant and stable temperature range of the dielectric constant, leading to higher energy density and better thermal stability. Therefore, an ultrahigh discharge energy density (Ud) of 14.49 J cm−3 and an energy efficiency (η) of 84.9% have been obtained. Moreover, the MLCCs possess a good thermal stability with Ud variations of <±7% and η > 85% from 25 to 170 °C, and an excellent cycling stability with minimal Ud variations <±3.3% (5.49 ± 0.18 J cm−3) after 100k charge–discharge cycles. Overall, the 0.4BNT-0.6BTBZNT MLCCs are highly promising and significant for practical commercial high energy storage applications, and the composite strategy design can play an effective role in designing high energy storage performance and high thermal stability dielectric capacitors for power electronic and pulse power applications.

Graphical abstract: Ultrahigh energy density with excellent thermal stability in lead-free multilayer ceramic capacitors via composite strategy design

Supplementary files

Article information

Article type
Communication
Submitted
06 9月 2021
Accepted
24 10月 2021
First published
26 10月 2021

J. Mater. Chem. A, 2021,9, 25914-25921

Ultrahigh energy density with excellent thermal stability in lead-free multilayer ceramic capacitors via composite strategy design

P. Zhao, L. Chen, L. Li and X. Wang, J. Mater. Chem. A, 2021, 9, 25914 DOI: 10.1039/D1TA07643D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements