ma8b00209_si_001.pdf (3.48 MB)
Synthesis of Alkaline Anion Exchange Membranes with Chemically Stable Imidazolium Cations: Unexpected Cross-Linked Macrocycles from Ring-Fused ROMP Monomers
journal contribution
posted on 2018-04-13, 00:00 authored by Wei You, Kristina M. Hugar, Geoffrey W. CoatesIn
order to prepare base-stable, mechanically strong, and synthetically
feasible alkaline anion exchange membranes (AAEMs) for applications
in alkaline fuel cells, an imidazolium-fused cyclooctene monomer was
prepared and subjected to ring-opening metathesis polymerization (ROMP)
conditions. Surprisingly, macrocyclic oligomers were obtained instead
of high molecular weight polymers. High-performance AAEMs were synthesized
by using a bifunctional monomer to cross-link the macrocycles. The
resultant AAEMs showed high ionic conductivities (σOH– = 59 mS/cm at 50 °C), robust mechanical
properties, and excellent alkaline stabilities.
History
Usage metrics
Categories
Keywords
weight polymersfuel cellsUnexpected Cross-Linked MacrocyclesChemically Stable Imidazolium Cationsbifunctional monomerHigh-performance AAEMsanion exchange membranesring-opening metathesis polymerizationRing-Fused ROMP Monomersmacrocyclic oligomersOHimidazolium-fused cyclooctene monomerAlkaline Anion Exchange Membranes
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC