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Polymers having stable cationic pendant groups for use as anion exchange membranes

Patent ·
OSTI ID:2293910
Poly(aryl alkylene) polymers or poly(aryl-crown ether-alkylene) polymers with pendant cationic groups are provided which have an alkaline-stable cation, such as imidazolium, introduced into a rigid aromatic polymer backbone free of ether bonds. Hydroxide exchange membranes or hydroxide exchange ionomers formed from these polymers exhibit superior chemical stability, hydroxide conductivity, decreased water uptake, good solubility in selected solvents, and improved mechanical properties in an ambient dry state as compared to conventional hydroxide exchange membranes or ionomers. Hydroxide exchange membrane fuel cells and hydroxide exchange membrane electrolyzers comprising the poly(aryl alkylene) polymers or poly(aryl-crown ether-alkylene) polymers with pendant cationic groups exhibit enhanced performance and durability at relatively high temperatures.
Research Organization:
Univ. of Delaware, Newark, DE (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AR0000814
Assignee:
University of Delaware (Newark, DE)
Patent Number(s):
11,827,743
Application Number:
16/833,312
OSTI ID:
2293910
Country of Publication:
United States
Language:
English

References (15)

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Functionalizing Polystyrene with N -Alicyclic Piperidine-Based Cations via Friedel–Crafts Alkylation for Highly Alkali-Stable Anion-Exchange Membranes journal June 2020
Preparation and Characterization of Tetra-Imidazolium Hydroxide Polyphenylene Membranes via Nickel Catalyzed C–C Coupling Polymerization journal April 2016

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