Abstract
4,4′-Dichlorodiphenylsulfone-3,3′-disulfonic acid (disodium) salt and 4,4′-difluorodiphenylsulfone were used as sulfonated monomer. 4,4′-Fluorophenyl sulfones were used as the nonsulfonated monomer. 4,4′-Dihydroxy diphenyl ether or 4,4′-thiodibenzenethiol was used as the comonomer. The sulfonated poly (aryl ether sulfone) (SPES) and sulfonated poly (arylene thioether sulfone) (SPTES) with sulfonation degree of 30% and 50% were successfully prepared by nucleophilic polycondensation. Two kinds of aromatic polymer proton exchange membranes were prepared by using sulfonated poly phthalazinone ether ketone (SPPEK) material and fluidization method. The performance of the prepared aromatic polymer proton exchange membrane was researched by the micromorphology, ion exchange capacity, water absorption and swelling rate, oxidation stability, tensile properties, and proton conductivity. Experimental results show that there is no agglomeration in the prepared aromatic polymer proton exchange membrane. The ion exchange capacity is 0.76–1.15 mmol/g. The water absorption and swelling rate increase with the increase of sulfonation degree. The sulfonated poly (aryl ether sulfone) membrane shows better oxidation stability than sulfonated poly (aryl sulfide sulfone). They have good mechanical stability. The prepared aromatic polymer proton exchange membrane with low sulfonation degree has good performance, which can be widely used in portable power equipment, electric vehicles, fixed power stations, and other new energy fields.
Highlights
Energy is an important material basis for the survival and development of human society
With the development of society, the problems of environmental pollution, ecological damage, and climate change caused by the production, conversion, and use of fossil energy have posed a serious threat to human survival and development
Sulfonated poly phthalazinone ether ketone (SPPEK) and 4,4′-fluorophenyl sulfones (99% purity) were purchased from Dalian Baolimo New Materials Co., Ltd
Summary
Energy is an important material basis for the survival and development of human society. Fuel cell is a kind of environment-friendly power generation device [1] It hardly emits pollutants such as SOx and NOx to the outside world during its working process. Proton exchange membrane fuel cell (PEMFC) has a wide application prospect in the field of portable power equipment, electric vehicles, and fixed power stations due to its high energy density, high energy conversion efficiency, environmental friendliness, flexibility, and portability. Researchers have devoted themselves to developing PEM with high performance and low cost Sulfonated aromatic polymers, such as sulfonated polyetherketones and sulfonated polyethersulfones, have excellent film-forming properties, good thermal stability, and high proton conductivity, which makes them promising as alternative materials for PEMFC applications. Exchange membranes can be used in applications with different requirements
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