Ultrahigh energy density in dielectric nanocomposites by modulating nanofiller orientation and polymer crystallization behavior

• DOI: 10.1016/j.apmate.2024.100212
• Publication Date: 2024-05-23T19:10:30Z
• Authors: Ru Guo; Hang Luo; Di Zhai; Zhida Xiao; Haoran Xie; Yuan Liu; Fan Wang; Xun Jiang; Dou Zhang
• Keywords: Power density; Flexible Electronics; Polymer nanocomposite

High-energy density dielectrics for electrostatic capacitors are in urgent demand advanced electronics and electrical power systems. Poly(vinylidene fluoride) (PVDF) based nanocomposites have attracted remarkable attention by intrinsic high polarization, flexibility, low density, outstanding processability. However, it is still challenging to achieve significant improvement energy due the common contradictions between electric polarization breakdown strength. Here, we proposed a novel facile strategy that simultaneously achieves construction of in-plane oriented BaTiO3 nanowires crystallization modulation PVDF matrix via an in-situ uniaxial stretch process. The polar phase transition enhanced Young's modulus facilitate synergetic voltage endurance capability matrix. Additionally, aligned distribution could reduce contact probability nanowire tips, thus alleviating field concentration hindering conductive path. Finally, record 38.3 J/cm3 40.9 achieved single layer optimized sandwich-structured nanocomposite, respectively. This work provides unique structural design universal method dielectric with ultrahigh which presents promising prospect practical application modern storage