Radical polymer-wrapped SWNTs at a molecular level: High-rate redox mediation through a percolation network for a transparent charge-storage material

  • Choi W
  • Ohtani S
  • Oyaizu K
 et al. 
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Abstract

Composites of the radical polymer PTMA and SWNTs were prepd. via polymer-wrapping process using a combination of ultrasonication and ultracentrifugation without any surfactants. The TEM image anal. supports the efficient wrapping on a mol. level with a single-chain conformation of the PTMA polymer. The network of individualized SWNTs enhanced the charge propagation in the PTMA, thus providing a quant. charge-storage capacity at a high rate. As far as we know, the amt. of conductive material is the smallest to form conductive pathway allowing the quant. formula-based redox capacity. This fact suggests that this method is not only advantageous to a cathode-active material of so called "radical battery" but also in other potential applications such as rechargeable devices, counter electrodes for electrochromic devices, and wet-type devices. [on SciFinder(R)]

Author-supplied keywords

  • electrode-active materials
  • rechargeable batteries
  • redox polymers
  • single-walled carbon nanotubes

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Authors

  • Wonsung Choi

  • Shota Ohtani

  • Kenichi Oyaizu

  • Hiroyuki Nishide

  • Kurt E. Geckeler

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