Related Experiment Video
Updated: May 20, 2026

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
Local Polarization Unit Engineering Enables Ultrahigh Energy Density in NBT-Based High-Entropy Ceramic Capacitors
Shiyu Zhou1, Yucheng Zhou2, Linhai Li3
1Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, China.
None:
Dielectric energy storage capacitors play a pivotal role in pulsed power systems. Herein, we demonstrate a breakthrough in dielectric energy storage by engineering local polarization units in high-entropy multilayer ceramic capacitors (MLCCs). By incorporating equimolar Ba2 +/Sr2 + dual cations, we precisely smoothen the phase transition and stabilize a nanoscale phase-coexistence state in an NBT-based matrix, which simultaneously retain robust local polar units while disrupting long-range domain order. This unique configuration, validated by atomic-resolution HAADF-STEM and phase-field simulations, enables a high reversible polarization and breakdown strength. The optimized MLCCs achieve an ultrahigh recoverable energy density of 18.2 J cm-3 with 91% efficiency, coupled with exceptional thermal stability and fatigue resistance. This work establishes a general design paradigm for high-entropy dielectrics for energy storage by controlling local polarization configurations.
Related Concept Videos
Dielectric Polarization in a Capacitor
Potential Due to a Polarized Object
MOS Capacitor
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
Susceptibility, Permittivity and Dielectric Constant
Capacitors
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...

