Charge- and Proton-Storage Capability of Naphthoquinone-Substituted Poly(allylamine) as Electrode-Active Material for Polymer - Air Secondary Batteries

Kouki Oka, Saki Murao, Kazuki Kobayashi, Hiroyuki Nishide, Kenichi Oyaizu

研究成果: Article査読

1 被引用数 (Scopus)

抄録

1,4-Naphthoquinone (NQ) undergoes a two electron and two proton redox process in one step at a potential of -0.05 V (vs Ag/AgCl) in 0.05 M H2SO4 aqueous solution. Its heterogeneous electron transfer rate constant is comparable to those of electrochemically reversible redox-active molecules. Therefore, NQ is a potential electrode-active material candidate in acidic aqueous electrolyte. Simple nucleophilic substitution of 2-bromo-1,4-naphthoquinone and poly(allylamine) yields NQ-substituted poly(allylamine) (PNQ), enabling us to adjust the hydrophilicity of the redox polymer according to the NQ introduction rate. A polymer-air secondary battery composed of the PNQ anode, the Pt/C cathode, and 0.05 M H2SO4 aqueous electrolyte displayed high cyclability (>100 cycles) and C-rate capability (∼15 C) with a moderate voltage of 0.8 V during discharging.

本文言語English
ページ(範囲)12019-12024
ページ数6
ジャーナルACS Applied Energy Materials
3
12
DOI
出版ステータスPublished - 2020 12 28

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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