Near‐Zero Energy Dissipation Multilayer Ceramic Capacitors via Inhomogeneous Polarization Design Article Swipe

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Materials science Dissipation Capacitor Polarization (electrochemistry) Ceramic capacitor Energy storage Ceramic Pulsed power Film capacitor Power density Optoelectronics Voltage Composite material Electrical engineering Power (physics) Thermodynamics Engineering Physics Physical chemistry Chemistry

Jinnan Liu , Weichen Zhao , Jiajia Ren , Wenyuan Liu , Da Li , Zhentao Wang , Yang Liu , Wenfeng Liu , Tao Zhou , Diming Xu , Guohua Chen , Kar Ban Tan , Di Zhou ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.1002/smll.202501062 · OA: W4408921974

Multilayer ceramic capacitors (MLCCs) demonstrate considerable potential for advance pulsed power systems, owing to their high‐power density and fast charge/discharge capabilities. In light of the increasing demand for energy conservation, minimizing energy dissipation in storage capacitors while maintaining high recoverable energy densities is essential for their practical application. In this study, building upon the morphotropic phase boundary (MPB) between Bi 0.5 Na 0.5 TiO 3 (BNT) and NaNbO 3 , heterogeneous cations (Ba 2+ , Zn 2+ , and Nb 5+ ) are further doped using an inhomogeneous polarization design to enhance the random field. This strategy leads to the formation of a disordered polarized structure with nanoscale multiphase characteristics. The results indicate that the BNT‐based MLCC achieves a high recoverable energy density ( W rec ≈ 9.1 J·cm −3 ) and an exceptionally high energy storage efficiency ( η ≈ 97.5%) under 620 kV·cm −1 . In addition, the MLCC exhibits excellent stability across a wide range of temperatures and frequencies, coupled with exceptional charge/discharge performance. This study offers a practical approach for the future development of BNT‐based MLCCs with near‐zero energy dissipation.