Sandwich Structure Design for Coordinated Enhancement of Polarization and Breakdown in Lead‐Free Energy Storage Ceramics
Source abstract
Abstract
ABSTRACT High‐energy‐density ceramic capacitors that do not rely on lead critical for mitigating environmental pollution and addressing the growing energy demand. However, electromechanical coupling often prevents the simultaneous enhancement of maximum polarization ( P max ) and breakdown field strength ( E b ), which limits further advances in energy storage performance (ESP). To overcome this constraint, we adopt a macroscopic structural design strategy and fabricate sandwich‐structured ceramics using a tape‐casting process. This architecture enables concurrent regulation of polarization and breakdown strength, effectively alleviating their intrinsic trade‐off and substantially increasing the energy density. Consequently, lead‐free ceramics with a sandwich configuration deliver a recoverable energy density ( W rec ) of 6.83 J·cm −3 accompanied by a high efficiency ( η ) of 92.0% under 487 kV·cm −1 . The η remains above 93.3% over frequencies from 1 to 100 Hz and temperatures from 20°C to 140°C, while the variation in W rec stays within ±5.2%. In addition, the ceramics exhibit a high power density ( P D ) of 78.52 MW·cm −3 . These results highlight sandwich‐structured lead‐free ceramics as promising candidates for high‐performance energy‐storage capacitors.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Dielectric materials and actuators · Ferroelectric and Piezoelectric Materials · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Shaanxi University of Science and Technology Xi'an China
School of Advanced Materials and Nanotechnology Xidian University Xi'an China
Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry Ministry of Education Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry & Technology Shaanxi University of Science & Technology Xi'an China
Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices Huizhou University Huizhou China
State Key Laboratory of Advanced Materials and Electronic Components Guangdong Fenghua Advanced Technology Holding Co. Ltd. Zhaoqing China
Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education & International Center for Dielectric Research School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an China
Funding
National Key Research and Development Program of China · State Key Laboratory of Advanced Materials and Electronic Components, Guangdong Fenghua Advanced Technology Holding
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