Enhanced recoverable energy storage density and efficiency in (1 − x)Ba0.85Ca0.15Zr0.1Ti0.9O3-xSrTiO3-MnO2 lead-free ceramics

Lead-free dielectric capacitors have attracted much attention in pulsed power systems due to their rapid charge/discharge rate. However, their recoverable energy storage density (Wrec) and efficiency (η) still need further improvement to meet the requirements for their application in energy storage...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2022-03, Vol.10 (10), p.3876-3885
Main Authors: Yang, Wenjin, Huang, Fengzhen, LiHuai Shu, Yang, YuLong, Gong, Baolian, Lu, Xiaomei, Zhu, Jinsong
Format: Article
Language:English
Subjects:
Barium titanates
Capacitors
Ceramics
Dielectric breakdown
Dielectric strength
Discharge
Electronic devices
Energy storage
Ferroelectric materials
Ferroelectricity
Flux density
Lead free
Manganese dioxide
Polarization
Sintering aids
Solid solutions
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Lead-free dielectric capacitors have attracted much attention in pulsed power systems due to their rapid charge/discharge rate. However, their recoverable energy storage density (Wrec) and efficiency (η) still need further improvement to meet the requirements for their application in energy storage devices. In this article, SrTiO3 (ST) and MnO2 were introduced to Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) to obtain a (1 − x)BCZT-xST solid solution, where morphotropic phase boundary ferroelectric BCZT possesses high polarization, paraelectric ST has a high dielectric breakdown strength (Eb), and the 0.3 mol% MnO2 contributes to the dense and fine-grained microstructure as a sintering aid. A high Eb of 436 kV cm−1, large ferroelectric polarization of 33.0 μC cm−2, and small remnant polarization of 2.1 μC cm−2 were obtained in the 0.3BCZT-0.7ST ceramic. As a result, a large Wrec of 5.36 J cm−3 and a high η of 82.2% were simultaneously achieved. Moreover, the 0.3BCZT-0.7ST ceramic exhibits a large DC discharge energy density of 5.63 J cm−3 and an ultrafast discharge time (t0.9) of 46 ns, and therefore an extremely high power density (PD) of 367.8 MW cm−3 and a large current density (CD) of 1337.6 A cm−2, two essential parameters for practical application in high-power devices. These results highlight the potential applications of the 0.3BCZT-0.7ST ceramic in pulsed power capacitors with high energy storage density and provide a comprehensive guideline for the control of BaTiO3-based dielectric capacitors.
ISSN:2050-7526
2050-7534
DOI:10.1039/d2tc00056c