Dielectric Ceramics for Capacitor Energy Storage

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Polycrystalline Ceramics".

Deadline for manuscript submissions: 15 October 2024 | Viewed by 3307

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School of Materials Science and Engineering, State Key Laboratory of Material Processing, Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: piezoelectric ceramics and devices; dielectric ceramics and devices; solid oxide fuel cells; 3D printing
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Dear Colleagues,

Energy storage materials and their applications have long gained the attention of both academic and industry communities. Over the past decade, extensive efforts have been devoted to the development of high-performance lead-free dielectric capacitors, including ferroelectric ceramics, composite ceramics, and multilayer capacitors. Many exciting advances have been made in the development of lead-free energy storage materials and their applications. Bulk ceramics have surpassed the energy storage density of 10 J/cm3. For material systems, the dimensional engineering of the grain and electrical domains played an important role. The finer the ceramic grains, the higher the breakdown strength, which brings KNN-based ceramics with submicron grains into the hotspot of research. Relaxor ferroelectric materials with nanoscale electrical domains have also occupied most of the energy storage field. Recently, the strategy of introducing relaxor ferroelectrics into antiferroelectric systems, to reduce the electric domain size and improve the energy storage performance, has also been proven to be effective. This implies great potential for the dimensional engineering of electrical domains to improve the performance of antiferroelectric systems, which could open up a new chapter in antiferroelectric ceramics for energy storage. Both academic and industry experts will be interested in this Special Issue of Crystals.

Prof. Dr. Haibo Zhang
Guest Editor

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Keywords

  • dielectric ceramics
  • energy storage density
  • ceramic capacitor
  • breakdown strength
  • energy storage efficiency

Published Papers (2 papers)

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Research

8 pages, 1767 KiB  
Communication
SPS-Prepared High-Entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 Lead-Free Relaxor-Ferroelectric Ceramics with High Energy Storage Density
by Ya Lu, Haibo Zhang, Huabin Yang, Pengyuan Fan, Chanatip Samart, Naohisa Takesue and Hua Tan
Crystals 2023, 13(3), 445; https://doi.org/10.3390/cryst13030445 - 04 Mar 2023
Cited by 9 | Viewed by 1725
Abstract
Compared to batteries and electrochemical capacitors, dielectric capacitors are widely studied because of their huge advantages in terms of charging/discharging speed and power density. In this work, high-entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 lead-free relaxor-ferroelectric ceramics [...] Read more.
Compared to batteries and electrochemical capacitors, dielectric capacitors are widely studied because of their huge advantages in terms of charging/discharging speed and power density. In this work, high-entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 lead-free relaxor-ferroelectric ceramics were prepared by both conventional sintering (CS) and spark plasma sintering (SPS). The results showed that the ceramic prepared by SPS obtained a high energy storage density of 6.66 J/cm3 and a satisfied energy storage efficiency of 77.2% under an electric field of 430 kV/cm. This is directly related to the high density, fine grains, number of oxygen vacancies, and composition uniformity of the SPS samples. This study provides a new path for the preparation of high-entropy dielectric energy storage ceramics with high energy storage properties. Full article
(This article belongs to the Special Issue Dielectric Ceramics for Capacitor Energy Storage)
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11 pages, 6030 KiB  
Article
On the Enhancement of Energy Storage Performance in Modified Relaxor Ferroelectric Ceramics for Pulsed Power Applications
by Hao Zhang, Zhe Zhu, Zhonghua Yao, Hua Hao, Lingyun Wang, Minghe Cao and Hanxing Liu
Crystals 2023, 13(1), 84; https://doi.org/10.3390/cryst13010084 - 02 Jan 2023
Cited by 2 | Viewed by 1247
Abstract
Relaxor-type ferroelectrics show important potential in energy storage fields due to their significantly enhanced energy performance and good temperature stability compared to normal ferroelectrics. Here, a novel, high-performance ternary composition, (0.4−x)BiFeO3-xBi(Mg1/2Ti1/2)O3–0.6BaTiO3 (x = 0.2, [...] Read more.
Relaxor-type ferroelectrics show important potential in energy storage fields due to their significantly enhanced energy performance and good temperature stability compared to normal ferroelectrics. Here, a novel, high-performance ternary composition, (0.4−x)BiFeO3-xBi(Mg1/2Ti1/2)O3–0.6BaTiO3 (x = 0.2, 0.25, 0.3, 0.35, 0.4), was designed by compositional modulation, which displays typical relaxor characteristics. The optimum energy storage properties can be attained at x = 0.35, accompanied by energy efficiency of 84.87%, a promising energy storage density of 2.3 J/cm3 and good temperature stability of less than 10% over 20–160 °C. Moreover, the samples provide stable cycling fatigue after 105 cycles and a fast discharge time of t0.9 < 0.1 μs, indicative of promising applications in energy units. Full article
(This article belongs to the Special Issue Dielectric Ceramics for Capacitor Energy Storage)
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