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


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, E a 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.

SUBMITTER: Narayana YSLV 

PROVIDER: S-EPMC9089287 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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

Narayana Yemineni S L V YSLV   Chakraborty Chanchal C   Rana Utpal U   Ninomiya Yoshikazu Y   Yoshida Takefumi T   Higuchi Masayoshi M  

RSC advances 20181105 65


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 10<sup>4</sup> times higher proton conductivity than the polymer with coordinated carboxylic acids (PolyEu) and about  ...[more]

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