Poly(arylene)-based anion exchange polymer electrolytes
View Patent ↗Poly(arylene) electrolytes including copolymers lacking ether groups in the polymer may be used as membranes and binders for electrocatalysts in preparation of anodes for electrochemical cells such as solid alkaline fuel cells.
1. A copolymer having the formula
wherein Ar 1 and Ar 2 are independently selected from 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, 4,4′-biphenylene, 4,4′thiobisphenylene, 2,2′-biphenylene, 2,2′-diphenylpropane, 2,2-diphenylhexafluoropropane, p-terphenylene, and 2,2′,3,3′,5,5′, 6,6′-octafluorobiphenylene,
wherein X is —(SO 2 )—
wherein Z is independently selected from alkylammonium, alkylphosphonium, and guanidinium, and
wherein n and m are integers from 10 to 10,000.
2. The copolymer of claim 1 , wherein Z comprises methyl, ethyl, propyl, isopropyl, butyl, phenyl, benzyl or combinations thereof.
3. The copolymer of claim 1 , wherein X is —(SO 2 )—, wherein Ar 1 and Ar 2 are 1,4-phenylene, wherein Z is trialkylammonium attached to Ar 1 with —(CH 2 )—.
4. A copolymer composition having the formula
or having the formula
or having the formula
or having the formula