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Realizing Superior Energy Storage Performance and Ultrafast Discharge Rate in NaNbO3-Based Ceramics by Multiscale

Xiao Zhai1, Mengdi Lu1, Juan Du2

  • 1School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.

ACS Applied Materials & Interfaces
|April 30, 2025
PubMed
Summary

Researchers enhanced energy storage in NaNbO3-based ceramics using a multiscale strategy. This approach improved energy density and efficiency for advanced dielectric capacitors.

Keywords:
NaNbO3energy storagelead-free ceramicsrelaxationresistivity

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Area of Science:

  • Materials Science
  • Energy Storage
  • Ceramics

Background:

  • Dielectric capacitors are crucial for energy storage but face challenges in achieving high energy density and efficiency.
  • Developing advanced dielectric materials is essential for next-generation energy storage devices.

Purpose of the Study:

  • To enhance the energy storage performance of NaNbO3-based ceramics.
  • To investigate the effects of nanoscale polar-nanoregions (PNRs) and microscale grain structure regulation on energy storage properties.

Main Methods:

  • A multiscale manipulation strategy was employed, integrating PNRs regulation (nanoscale) and grain-structure regulation (microscale).
  • The study involved incorporating (Bi0.5Na0.5)0.7Sr0.3TiO3 (BNST) into (Na0.94La0.06)(Nb0.88Zr0.12)O3 (NLNZ) ceramics.
  • Characterization of ceramic properties, including breakdown electric field, energy storage density, and efficiency.

Main Results:

  • The incorporation of BNST induced a high density of PNRs, leading to high efficiency and ultrafast discharge rates.
  • Microscale regulation (decreased grain size, dense structure) enhanced resistivity and activation energy, increasing the breakdown electric field and energy storage density.
  • The optimal 0.80NLNZ-0.20BNST ceramic achieved a high recoverable energy density (Wrec ~ 9.3 J/cm3) and efficiency (η ~ 82.4%) at a high breakdown electric field (Eb ~ 920 kV/cm).

Conclusions:

  • The multiscale manipulation strategy effectively enhances the energy storage performance of NaNbO3-based ceramics.
  • The 0.80NLNZ-0.20BNST ceramic demonstrates excellent stability and charge/discharge characteristics, indicating significant potential for energy storage applications.
  • This work provides a viable route for designing high-performance dielectric materials for advanced energy storage devices.