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Modulation of a coordination structure in a europium(iii)-based metallo-supramolecular polymer for high proton conduction
- Source :
- RSC advances. 8(65)
- Publication Year :
- 2018
-
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.
- Subjects :
- chemistry.chemical_classification
Materials science
Proton
General Chemical Engineering
Inorganic chemistry
chemistry.chemical_element
02 engineering and technology
General Chemistry
Polymer
Activation energy
Conductivity
010402 general chemistry
021001 nanoscience & nanotechnology
Thermal conduction
01 natural sciences
0104 chemical sciences
Supramolecular polymers
chemistry
Grotthuss mechanism
0210 nano-technology
Europium
Subjects
Details
- ISSN :
- 20462069
- Volume :
- 8
- Issue :
- 65
- Database :
- OpenAIRE
- Journal :
- RSC advances
- Accession number :
- edsair.doi.dedup.....55f97be5a85f82e7f1fff55532197807