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Strain-Adaptive Dielectric Metamaterials via Bioinspired "Ligament-Bone" Architecture for Ultrahigh-Energy Capacitive
Jian Wang1, Xinyu Wang2, Jiabao Wang2
1Ningxia Key Laboratory of Photovoltaic Materials, School of Materials and New Energy, Ningxia University, Yinchuan, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 24, 2026
Summary
Researchers developed a novel bioinspired dielectric metamaterial that overcomes limitations in energy storage. This strain-adaptive material achieves record energy density and efficiency, paving the way for advanced electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Energy Storage
Background:
- Polymer dielectrics for capacitive energy storage face inherent trade-offs between performance metrics.
- Existing materials struggle to balance breakdown strength, energy density, efficiency, and mechanical robustness.
Purpose of the Study:
- To design a bioinspired strain-adaptive dielectric metamaterial overcoming conventional limitations.
- To achieve unprecedented electro-mechanical properties for advanced energy storage applications.
Main Methods:
- Fabrication of a hierarchical "ligament-bone" metamaterial using epoxy-functionalized polyvinylidene fluoride and alumina-coated barium titanate nanocores.
- Engineering core-shell structures with strain-responsive shells.
- Utilizing operando characterizations and multiscale simulations to analyze material behavior.
Main Results:
- Achieved a record energy density of 26.1 J cm-3 with 90.2% efficiency at 600 MV m-1.
- Demonstrated a Young's modulus of 2.13 GPa, indicating significant mechanical robustness.
- Revealed strain-adaptive reconfiguration of polymer chains and interfaces optimizes performance under extreme conditions.
Conclusions:
- The bioinspired, hierarchical design breaks traditional trade-offs in dielectric materials.
- This strain-adaptive metamaterial offers a universal framework for next-generation dielectrics.
- Enables robust energy storage solutions for extreme-condition electronics.
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