Modulation of a coordination structure in a europium(iii)-based metallo-supramolecular polymer for high proton conduction

Yemineni S.L.V. Narayana, Chanchal Chakraborty, Utpal Rana, Yoshikazu Ninomiya, Takefumi Yoshida, Masayoshi Higuchi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Developing high proton conducting solid materials is significant in the field of fuel cells. A europium(iii)-based metallo-supramolecular polymer with uncoordinated carboxylic acids (PolyEu-H) was successfully synthesized by modifying the synthesis conditions. The proton conductivity was enhanced with increasing the relative humidity (RH) from 30 to 95% RH. PolyEu-H showed about 104 times higher proton conductivity than the polymer with coordinated carboxylic acids (PolyEu) and about 400 times higher than the polymer without carboxylic acids (PolyEu-2). The proton conductivity of PolyEu-H reached 4.45 × 10−2 S cm−1 at 95% RH and 25 °C and 5.6 × 10−2 S cm−1 at 75 °C. The activation energy, Ea was ultralow (0.04 eV), which indicates proton conduction based on the Grotthuss mechanism. The results indicate that efficient proton conduction occurs through proton channels formed by moisture in PolyEu-H.

Original languageEnglish
Pages (from-to)37193-37199
Number of pages7
JournalRSC Advances
Volume8
Issue number65
DOIs
Publication statusPublished - 2018
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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