TY - JOUR
T1 - Facile Synthesis of Isotactic Polyacrylonitrile via Template Polymerization in Interlayer Space for Dielectric Energy Storage
AU - Wang, Yu
AU - Nakamura, Ryota
AU - Suga, Takeo
AU - Li, Shengtao
AU - Ohki, Yoshimichi
AU - Nishide, Hiroyuki
AU - Oyaizu, Kenichi
N1 - Funding Information:
This work was partially supported by Grants-in-Aids for Scientific Researchs (Nos. 17H03072, 18K19120, 18H05515, and 18H03921) from MEXT, Japan.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/2/14
Y1 - 2020/2/14
N2 - 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.
AB - 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.
KW - breakdown strength
KW - dielectric polymer
KW - energy storage
KW - stereoregularity
KW - template polymerization
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U2 - 10.1021/acsapm.9b01074
DO - 10.1021/acsapm.9b01074
M3 - Article
AN - SCOPUS:85087417986
SN - 2637-6105
VL - 2
SP - 775
EP - 781
JO - ACS Applied Polymer Materials
JF - ACS Applied Polymer Materials
IS - 2
ER -