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Updated: Jan 15, 2026

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
Polymorphic heterogeneous structures and grain refinement engineering co-assisted high capacitive energy storage in
Peng Zheng1, Jiaqi Wang1, Yong Feng1
1Lab for Nanoelectronics and Nano Devices, Department of Electronics Science and Technology, Hangzhou Dianzi University, Hangzhou 310018, China.
None:
Dielectric capacitors with both large energy density (Wrec) and energy efficiency (η) and wide temperature usage scope are highly in demand for electrical and electronic systems applications. Inversely, there is still a huge challenge with the trade-off correlation between both two parameters that remains unaddressed, which deteriorates the service life of dielectric capacitors. Herein, by combining phase construction and grain refinement engineering, we design a high-entropy lead-free dielectric ceramic with simultaneous achievements of significantly improved Wrec of 9.02 J/cm3 and η of 82 % under a high electric field of 720 kV/cm, and superior thermal endurance (i.e., Wrec and η value higher than 5.2 J/cm3 and 84 % within 25-160 °C, respectively), overmatching those of most lead-free energy storage ceramics. Two synergistic effects, namely, polymorphic heterogeneous structures concomitant with multiphase polar nanoregions coexistence and ultra-small grain size, contribute to the substantially enhanced energy storage performance and superior temperature stability. As a result, our proposed tactic offers a referential paradigm to boost both capacitive energy storage and temperature stability for the development of energy storage capacitors.
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