Achieving High Energy Density and Low Loss in PVDF/BST Nanodielectrics with Enhanced Structural Homogeneity
| Autor: | Yunchuan Xie, Tao Fu, Zhicheng Zhang, Jingjing Liu, Wanrong Jiang, Shengnan Wang |
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| Rok vydání: | 2018 |
| Předmět: |
Permittivity
chemistry.chemical_classification Nanocomposite Materials science Composite number 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry visual_art visual_art.visual_art_medium Surface modification General Materials Science Dielectric loss Ceramic Composite material 0210 nano-technology Leakage (electronics) |
| Zdroj: | ACS Applied Materials & Interfaces. 10:29038-29047 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.8b10354 |
| Popis: | Poor compatibility of polymer/ceramic composites used as high-pulse capacitors with high permittivity suffers from the reduced breakdown strength (Eb) and lowered energy density (Ue). Herein, mussel-inspired poly(dopamine) (PDA)-modified BaSrTiO3 (mBST) nanoparticle and poly(vinylidene fluoride) (PVDF) matrix are bonded together to fabricate nanocomposites with a cross-linked network and enhanced compatibility. The significantly improved Eb of 466 MV/m and the highest Ue of 11.0 J/cm3 for PVDF-based polymer/BST composites have been obtained. By comparing the properties of the three series of composites with different structures, the contribution of ferroelectric relaxation, interface polarization, and leakage conduction to the dielectric loss has been well addressed. Notably, the surface modification of BST with PDA could remarkably enhance the compatibility of the two components and the structural homogeneity of the composite. The improved bonding between the polymer matrix and the filler chemically or p... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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