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Facile Synthesis of Isotactic Polyacrylonitrile via Template Polymerization in Interlayer Space for Dielectric Energy Storage

  • Yu Wang
    Yu Wang
    Department of Applied Chemistry and Research Institute for Science and Engineering, Waseda University, Tokyo, 169-8555, Japan
    More by Yu Wang
  • Ryota Nakamura
    Ryota Nakamura
    Department of Applied Chemistry and Research Institute for Science and Engineering, Waseda University, Tokyo, 169-8555, Japan
  • Takeo Suga*
    Takeo Suga
    Department of Applied Chemistry and Research Institute for Science and Engineering, Waseda University, Tokyo, 169-8555, Japan
    *Email: [email protected]
    More by Takeo Suga
  • Shengtao Li
    Shengtao Li
    State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an, 710049 Shaanxi, People’s Republic of China
    More by Shengtao Li
  • Yoshimichi Ohki
    Yoshimichi Ohki
    Department of Electrical Engineering and Bioscience, Waseda University, Tokyo, 169-8555, Japan
  • Hiroyuki Nishide
    Hiroyuki Nishide
    Department of Applied Chemistry and Research Institute for Science and Engineering, Waseda University, Tokyo, 169-8555, Japan
  • , and 
  • Kenichi Oyaizu*
    Kenichi Oyaizu
    Department of Applied Chemistry and Research Institute for Science and Engineering, Waseda University, Tokyo, 169-8555, Japan
    *Email: [email protected]
Cite this: ACS Appl. Polym. Mater. 2020, 2, 2, 775–781
Publication Date (Web):January 14, 2020
https://doi.org/10.1021/acsapm.9b01074
Copyright © 2020 American Chemical Society
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Abstract

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Isotactic polyacrylonitrile (iso-PAN) is synthesized via template polymerization using the two-dimensional layered space of a CoCl2 crystal as a template. Isotacticity of polyacrylonitrile reaches a meso/meso triad = 93% (mm = 0.93), which indicates a superior packing of polymer chains, leading to a high breakdown strength. Tacticity enhancement is correlated with the interatomic (metal–metal) distance of template-layered crystals. Due to a large dipole moment (4.3 D) of nitrile group and a high stereoregularity, iso-PAN demonstrates a high discharge energy density of 6.7 J/cm3 at 660 MV/m, nearly six times that of atactic polyacrylonitrile (ata-PAN) and biaxially oriented polypropylene (BOPP), a commercially available dielectric polymer film. Moreover, it exhibits a charge–discharge efficiency of ca. 90% in a wide applied electric field range, which is higher than the efficiencies of ata-PAN and BOPP. These results suggest that iso-PAN, exhibiting a large dipole moment and high stereoregularity, is a promising candidate for high energy density and low loss capacitor dielectrics.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsapm.9b01074.

  • Simulated molecular geometry of AN predicted using DMol3 parameters (Figure S1) and broadband dielectric spectroscopy (BDS) measurement of iso-PAN and ata-PAN (Figures S2 and S3) (PDF)

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Most electronic Supporting Information files are available without a subscription to ACS Web Editions. Such files may be downloaded by article for research use (if there is a public use license linked to the relevant article, that license may permit other uses). Permission may be obtained from ACS for other uses through requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html.

Cited By

This article is cited by 3 publications.

  1. Yunyun Yang, Lei Huang, Yusen Zhao, Zijin Yan, Ximin He, Xufu Cai. Effects of hydrolysis degree on the formation of ferroelectric-core fillers and the electric performance of polyvinyl alcohol composites. Composites Science and Technology 2022, 218 , 109147. https://doi.org/10.1016/j.compscitech.2021.109147
  2. Yunyun Yang, Yujia Liu, Xufu Cai. Effects of ultralow concentration MXene (nano-Ti3C2Tx) on the electric and physical properties of ternary polyvinyl alcohol composites. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2021, 610 , 125929. https://doi.org/10.1016/j.colsurfa.2020.125929
  3. Shaonan Chen, Xuemei Yan, Wentao Liu, Rui Qiao, Sheng Chen, Hang Luo, Dou Zhang. Polymer-based dielectric nanocomposites with high energy density via using natural sepiolite nanofibers. Chemical Engineering Journal 2020, 401 , 126095. https://doi.org/10.1016/j.cej.2020.126095

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