Abstract
This paper chooses to use polyvinylidene fluoride (PVDF) as the matrix, multiwalled carbon nanotubes (MWCNT) modified by polydopamine (PDA) as fillers, to prepare the MWCNT@PDA/PVDF composite films with excellent energy storage characteristics. The films were prepared by solution tape casting MWCNT@PDA/PVDF and MWCNT/PVDF composite films. The microstructures and properties of the composite films, especially the dielectric property, were investigated and the effect of MWCNT@PDA was analyzed. Results indicated that with the increase of filler content, the dispersion effect of filler in matrix becomes worse, and the energy storage modulus and dielectric constant increase gradually. When the content of MWCNT@PDA is 2.0 wt%, the dielectric constant of the MWCNT@PDA/PVDF composite film reaches 10.5 at 100 Hz, and the dielectric loss is 0.023. The addition of MWCNT@PDA is beneficial to increase the energy storage density of the composite membrane. When the content of MWCNT@PDA is 1.5 wt%, the energy storage density is 0.62 J/cm3, which is 2.7 times that of the pure membrane.
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Acknowledgements
The authors are thankful for the financial supports from the National Natural Science Foundation of China (51677045, 51177030), the Natural Science Foundation of Heilongjiang Province (E201224), and Harbin Science and Technology Innovation Talent program (2016RAQXJ059).
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YY and HX of this article contributed the same. YY performed experimental design and writing-review and editing. HX involved in analysis of experimental data. XW participated in data curation. LG and ZW involved in investigation. XZ provided the experimental analysis suggestion. LW performed resources and supervision.
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Yu, Y., Xu, H., Wang, X. et al. Investigation of morphology and dielectric properties of PVDF composite films reinforced with MWCNT@PDA core–shell nanorods. J Mater Sci: Mater Electron 33, 6842–6855 (2022). https://doi.org/10.1007/s10854-022-07862-1
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DOI: https://doi.org/10.1007/s10854-022-07862-1