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Inverse High-Entropy Design Enables Superior Energy Storage in Moderate and High Electric Fields.

Siyu Zhao1, Wenjun Cao1, Chunchang Wang1

  • 1Laboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei, China.

Small (Weinheim an Der Bergstrasse, Germany)
|February 9, 2026
PubMed
Summary
This summary is machine-generated.

An inverse high-entropy design strategy enhances dielectric capacitor energy storage. This approach balances polarization and breakdown strength, achieving superior performance for pulsed power systems.

Keywords:
dielectric capacitorsenergy storage performanceinverse high‐entropy designlead‐free ceramicspolar nanoregions

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Ceramics

Background:

  • Dielectric capacitors are crucial for pulsed power systems, but their energy storage performance (ESP) needs improvement.
  • High-entropy materials enhance breakdown strength (Eb) but limit polarization (Pm), restricting ESP to high electric fields.

Purpose of the Study:

  • To overcome limitations of traditional high-entropy design for dielectric energy storage.
  • To develop an inverse high-entropy strategy for enhanced ESP in dielectric capacitors.

Main Methods:

  • Utilized quasi-linear high-entropy ceramic Bi1/6Na1/6Sr1/6Ca1/6Li1/6La1/6TiO3 (BNSCLLT) as a matrix.
  • Incorporated ferroelectric BaTiO3 (BT) into the BNSCLLT matrix to tailor the polar structure.
  • Investigated compositions like 0.7BNSCLLT-0.3BT, 0.6BNSCLLT-0.4BT, and 0.5BNSCLLT-0.5BT.

Main Results:

  • Successfully induced a weakly polar tetragonal phase within the cubic BNSCLLT matrix by adding BT.
  • Optimized polarization response by promoting polar nanoregions, balancing increased Pm with controlled Eb.
  • Achieved high energy densities: 0.7BNSCLLT-0.3BT (10.9 J/cm3 at 600 kV/cm), 0.6BNSCLLT-0.4BT (11.6 J/cm3 at 580 kV/cm), and 0.5BNSCLLT-0.5BT (9.8 J/cm3 at 475 kV/cm).

Conclusions:

  • The inverse high-entropy design strategy effectively enhances dielectric energy storage performance.
  • This approach offers a new paradigm for developing advanced dielectric materials for pulsed power applications.
  • Achieved high energy storage across both high and moderate electric fields.