材料科学
聚偏氟乙烯
电介质
电容感应
纳米颗粒
复合材料
储能
芯(光纤)
壳体(结构)
渗透(认知心理学)
电压
光电子学
纳米技术
聚合物
电气工程
功率(物理)
工程类
物理
神经科学
生物
量子力学
作者
Ruben Windey,Filip Tavernier,Michiel Steyaert,Jin Won Seo,Paula Moldenaers,Martine Wevers
标识
DOI:10.1021/acsami.4c06696
摘要
Solid-state polymer dielectrics offer an exceptional dielectric breakdown, but require an enhanced energy density to be competitive with alternative electrolyte-based energy storage technologies. Therefore, this research introduces conductive titanium carbonitride (TiCN) nanoparticles in a polyvinylidene fluoride (PVDF) matrix to obtain flexible percolation-based nanodielectrics by ultrasonication-based suspension processing and hot pressing. Well-dispersed TiCN nanoparticles in PVDF were obtained for a wide range of filler volume fractions, and an exceptional peak in the dielectric constant equal to 1130 (0.1 Hz) and 29 (10 kHz) was observed near the percolation threshold (9.2 vol %). The enhanced dielectric constant was ascribed to massive interfacial polarization occurring, resulting from Maxwell-Wagner-Sillars (MWS) polarization and a nanocapacitor mechanism that are dominant at low and high frequencies, respectively. An improvement by 30% in the energy density (0.042 Wh kg
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