Hydrophilic Organic Redox-Active Polymer Nanoparticles for Higher Energy Density Flow Batteries

Kan Hatakeyama-Sato, Takashi Nagano, Shiori Noguchi, Yota Sugai, Jie Du, Hiroyuki Nishide, Kenichi Oyaizu*


研究成果: Article査読

32 被引用数 (Scopus)


Hydrophilic redox-active polymer nanoparticles with different redox potentials and radii were synthesized via the dispersion polymerization to yield their stable dispersion in aqueous electrolyte media as promising catholytes and anolytes in redox flow batteries. Despite the small physical diffusion coefficient (10-9 cm2/s) of the nanosized particles, the sufficiently large coefficient for charge transfer within the polymer particle dispersion (10-7 cm2/s) was observed as a result of the fast electron propagation throughout the polymer particles. Redox flow cells were fabricated using TEMPO-, viologen-, or diazaanthraquinone-substituted polymer nanoparticles as active materials. The reversible charge/discharge over 50 cycles was achieved even at a high concentration of the redox units (1.5 M), which exceeded the limitation of the solubility of the corresponding dissolved species.

ジャーナルACS Applied Polymer Materials
出版ステータスPublished - 2019 2月 8

ASJC Scopus subject areas

  • ポリマーおよびプラスチック
  • プロセス化学およびプロセス工学
  • 有機化学


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