Synthesis of Alkaline Anion Exchange Membranes with Chemically Stable Imidazolium Cations: Unexpected Cross-Linked Macrocycles from Ring-Fused ROMP Monomers

You, Wei; Hugar, Kristina M.; Coates, Geoffrey W.

doi:10.1021/acs.macromol.8b00209

Synthesis of Alkaline Anion Exchange Membranes with Chemically Stable Imidazolium Cations: Unexpected Cross-Linked Macrocycles from Ring-Fused ROMP Monomers

Journal Article · Fri Apr 13 00:00:00 EDT 2018 · Macromolecules

DOI:https://doi.org/10.1021/acs.macromol.8b00209· OSTI ID:1767454

You, Wei ^[1]; ^[2]; ^[2]

Cornell Univ., Ithaca, NY (United States); OSTI
Cornell Univ., Ithaca, NY (United States)

In 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 (σ_OH^– = 59 mS/cm at 50 °C), robust mechanical properties, and excellent alkaline stabilities.

View Accepted Manuscript (DOE)

Research Organization:: Cornell Univ., Ithaca, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Alkaline-Based Energy Solutions (CABES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0019445

OSTI ID:: 1767454

Journal Information:: Macromolecules, Journal Name: Macromolecules Journal Issue: 8 Vol. 51; ISSN 0024-9297

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Synthesis of Alkaline Anion Exchange Membranes with Chemically Stable Imidazolium Cations: Unexpected Cross-Linked Macrocycles from Ring-Fused ROMP Monomers

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