Confinement of poly(allylamine) in Preyssler-type polyoxometalate and potassium ion framework for enhanced proton conductivity

Tsukasa Iwano, Satoru Miyazawa, Ryota Osuga, Junko N. Kondo, Kayako Honjo, Takashi Kitao, Takashi Uemura, Sayaka Uchida

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Polyoxometalate based solids are promising candidates of proton-conducting solid electrolytes. In this work, a Preyssler-type polyoxometalate is crystallized with potassium ions and poly(allylamine), which is also a good proton conductor, from aqueous solutions. Here we show that the hygroscopicity induced low durability of polyoxometalate and poly(allylamine) can be circumvented by the electrostatic interaction between the polyoxometalate and protonated amine moieties in the solid state. Crystalline compounds are synthesized with poly(allylamine) of different average molecular weights, and all compounds achieve proton conductivities of 10−2 S cm−1 under mild-humidity and low-temperature conditions. Spectroscopic studies reveal that the side-chain mobility of poly(allylamine) and hydrogen-bonding network rearrangement contribute to the proton conduction of compounds with poly(allylamine) of low and high average molecular weights, respectively. While numbers of proton-conducting amorphous polyoxometalate-polymer composites are reported previously, these results show both structure-property relationship and high functionality in crystalline composites.

本文言語English
論文番号9
ジャーナルCommunications Chemistry
2
1
DOI
出版ステータスPublished - 2019 12 1
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料化学
  • 環境化学
  • 生化学

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