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High Energy Storage Performance of PZO/PTO Multilayers via Interface Engineering
Yuanyuan Zhang1,2, Qianqian Chen1, Ruijuan Qi1
1Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Science, School of Physics and Electronic Science, East China Normal University, Shanghai200241, People's Republic of China.
ACS Applied Materials & Interfaces
|January 27, 2023
Summary
Researchers developed a high-performance multilayer heterostructure for energy storage capacitors. This (PbZrO3/PbTiO3) design achieves a record 36.4 J/cm³ energy density due to enhanced breakdown strength.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Electrical Engineering
Background:
- Antiferroelectric thin-film capacitors are crucial for energy storage due to their low remanent polarization and rapid discharge capabilities.
- Multilayer heterostructures offer a promising strategy to boost breakdown strength and overall device functionality.
Purpose of the Study:
- To investigate the energy storage performance of a (PbZrO3/PbTiO3) multilayer heterostructure.
- To understand the relationship between microstructure, breakdown strength, and energy storage density.
Main Methods:
- Fabrication of (PbZrO3/PbTiO3) multilayer heterostructures.
- Electrical characterization to determine breakdown strength and energy storage density.
- Atomic-scale characterization to analyze microstructure and defect mechanisms.
Main Results:
- Achieved a maximum recoverable energy storage density of 36.4 J/cm³.
- Demonstrated a high electric breakdown strength of 2.9 MV/cm.
- Identified an optimal inflection point at n=3 layers, influenced by interfacial blockage and strain defects.
- Revealed the impact of heterointerface dislocations on energy storage performance.
Conclusions:
- Heterostructure engineering in (PbZrO3/PbTiO3) multilayers significantly enhances energy storage performance.
- Understanding interfacial and defect mechanisms is key to optimizing breakdown strength and energy density.
- Well-designed multilayer structures hold great potential for advanced energy storage applications.
