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Fully Printed Multilayer Ceramic Capacitors Based on High-k Perovskite Nanosheets.
Pengxiang Zhang1, Feng Dang2, Xin Zhang3
1State Key Laboratory of Silicate Materials for Architectures, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China.
Small (Weinheim an Der Bergstrasse, Germany)
|July 11, 2024
Summary
Inkjet printing enables multilayer perovskite nanosheet microcapacitors for enhanced performance. Optimized structures achieved high capacitance density and dielectric constants on various substrates, showcasing potential for advanced energy storage devices.
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Chemically exfoliated perovskite nanosheets offer potential for high-performance microcapacitors.
- Multilayer structures can theoretically enhance capacitance without increasing device size.
- Interlayer penetration in inkjet-printed heterojunctions limits performance.
Purpose of the Study:
- To develop inkjet-printed multilayer perovskite nanosheet microcapacitors.
- To optimize multilayer configurations for improved dielectric performance.
- To investigate the potential of additive manufacturing for 2D material-based capacitors.
Main Methods:
- Inkjet printing of Ag/(Ca2NaNb4O13/Ag)n and graphene/(Ca2NaNb4O13/graphene)n multilayer structures (n=1-3).
- Optimization of ink formulations, printing parameters, and thermal treatment.
- Fabrication on rigid and flexible substrates using perovskite nanosheets, graphene nanosheets, and silver.
Main Results:
- Successful inkjet printing of multilayer configurations on diverse substrates.
- Optimized dielectric performance by tuning layer number and electrode/dielectric interface.
- Graphene/(Ca2NaNb4O13/graphene)3 capacitors achieved 346 ± 12 nF cm⁻² capacitance density and 193 ± 18 dielectric constant.
- Demonstrated moderate insulation, flexibility, thermal stability, and chemical sensitivity.
Conclusions:
- Multilayer structural design via inkjet printing is effective for high-performance 2D material-based ceramic capacitors.
- Optimized perovskite/graphene multilayer structures show significant potential for energy storage applications.
- This approach offers a pathway for additive manufacturing of advanced microcapacitors.
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