Development of solid polymer electrolytes for water electrolysis at intermediate temperatures

The hydrolytic stability of a number of high-temperature polymers was determined at 200°, 300° and 400°C. None of the better-known ion-conducting polymers, such as perfluorinated alkyl sulfonate and poly(ethylene oxide) were stable at these temperatures. Based on 24 h exposure under steam/H 2 and st...

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Bibliographic Details
Published in:International journal of hydrogen energy 1993, Vol.18 (8), p.641-646
Main Author: Linkous, C.A.
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Energy
Exact sciences and technology
Fuels
Hydrogen
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Summary:The hydrolytic stability of a number of high-temperature polymers was determined at 200°, 300° and 400°C. None of the better-known ion-conducting polymers, such as perfluorinated alkyl sulfonate and poly(ethylene oxide) were stable at these temperatures. Based on 24 h exposure under steam/H 2 and steam/O 2 atmospheres at 200°C, liquid crystal polyesters, polybenzimidazoles and some polyimides showed sufficient stability to warrant further study. Polyphenylene sulfides, polysulfones, polyketones and some polyimides showed reasonable stability at 300°C. No candidates were found to be stable under steam/O 2 at 400°C, although some were stable under steam/H 2 at that temperature. The possibility of converting high-temperature polymers into highly conductive polymer electrolytes is discussed.
ISSN:0360-3199
1879-3487
DOI:10.1016/0360-3199(93)90116-R