Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 250, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2020.123155
Keywords
Capacitive energy storage; Ferroelectric polymers; Nanocomposite; Blending
Categories
Funding
- Natural Science Basic Research Plan in Shaanxi Province of China [2018JM5080]
- State Key Laboratory of Electrical Insulation and Power Equipment [EIPE19121]
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The growing demand for miniaturization of electrical and electronic system poses a great challenge on energy storage capacitors, which requires associated dielectric materials exhibiting high energy density. In ferroelectric polymer dielectrics, it is one of the key issues to achieve both high dielectric permittivity and high breakdown strength. In this paper, we propose a method on improving the dielectric permittivity and breakdown strength concurrently taking the advantage of nanocomposite and blending. Our results show that PVDF/PMMA/TiO2 blending nanodielectric material presents improved relative dielectric permittivity of 12 and breakdown strength of 387 kV/mm compared with pristine PVDF, leading to an enhanced energy density about 5.8 J/cm(3) and an efficiency of 77%. Further electric properties measurements and structure characterizations indicate that the moderate enhancement of permittivity can be ascribed to the doping of TiO2 nanoparticles, and the improved breakdown strength is caused by blending of PMMA with good insulating properties. Our results might provide a promising approach to develop high-performance energy-storage dielectric materials concerning the synergistic effect of blending and nanocomposite.
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