Dual sulfonated poly(arylene ether ketone) membrane grafted with 15-crown-5-ether for enhanced proton conductivity and anti-oxidation stability

In the proton exchange membrane fuel cell, durability has recently been the critical issue in its operation. As the Ce 3+ cerium ion (Ce) is a potential scavenger for &z.rad;OH and &z.rad;OOH radicals, the main causes of the chemical degradation of the membrane, aminomethyl-15-crown-5-ether...

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Bibliographic Details
Published in:Molecular systems design & engineering 2019-08, Vol.4 (4), p.91-911
Main Authors: Vo, Dinh Cong Tinh, Nguyen, Minh Dat Thinh, Kim, Dukjoon
Format: Article
Language:English
Subjects:
Cerium
Chemical synthesis
Conductivity
Coordination compounds
Corrosion resistance
Grafting
Infrared spectroscopy
Migration
NMR
Nuclear magnetic resonance
Organic chemistry
Oxidation
Polyaryletherketones
Proton exchange membrane fuel cells
Protons
Stability
Swelling ratio
X ray photoelectron spectroscopy
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Summary:In the proton exchange membrane fuel cell, durability has recently been the critical issue in its operation. As the Ce 3+ cerium ion (Ce) is a potential scavenger for &z.rad;OH and &z.rad;OOH radicals, the main causes of the chemical degradation of the membrane, aminomethyl-15-crown-5-ether (CRE) and dual sulfonated 3,3-diphenylpropylamine (DSDPA) were grafted onto poly(arylene ether ketone) (PAEK) to maintain high proton conductivity and chemical stability by alleviating the migration of Ce from the membrane. The chemical and physical structures of the synthesized CRE-grafted dual sulfonated PAEK membrane (DSPAEK-CRE) along with the coordination complex of CRE and Ce ions were investigated using FT-IR, 1 H-NMR and SAXs, and XPS spectroscopy. Fenton's test showed a huge improvement in anti-oxidation stability in the presence of CRE. While the CRE/Ce coordinated membrane showed higher proton conductivity and better chemical stability than the Ce 3+ dispersed one, other properties such as water uptake, swelling ratio, and mechanical strength were not significantly affected by CRE. In the proton exchange membrane fuel cell, durability has recently been the critical issue in its operation.
ISSN:2058-9689
2058-9689
DOI:10.1039/c9me00009g