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), w

SUBMITTER: Narayana YSLV 

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

REPOSITORIES: biostudies-literature