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AssigneeKorea Institute of Science and Technology
InventorsHyoung-Juhn Kim, Soo-Kil Kim, Eun Ae Cho, Jong Hyun Jang, Sung Pil Yoon, In Hwan Oh, Jonghee Han, Seong Ahn Hong, Suk-Woo Nam, Tae Hoon Lim
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Disclosed herein is an electrolyte membrane for a fuel cell. The electrolyte membrane includes a blend of polymers with different degrees of sulfonation. The electrolyte membrane can exhibit excellent effects such as improved long-term cell performance and good long-term dimensional stability while at the same time solving the problems of conventional hydrocarbon electrolyte membranes. Further disclosed are a membrane-electrode assembly and a fuel cell including the electrolyte membrane.
An electrolyte membrane for a fuel cell comprising a polymer blend of two poly(aryl ether sulfone)s having different degrees of sulfonation of 35 to 60% and 5 to 35%, the difference in degree of sulfonation between the poly(aryl ether sulfone)s being at least 5 to 40%.
An electrolyte membrane for a fuel cell comprising a polymer blend of three poly(aryl ether sulfone)s having different degrees of sulfonation of 40 to 60%, 15 to 40% and 5 to 15%, the difference in degree of sulfonation between the poly(aryl ether sulfone)s being at least 5 to 40%.
An electrolyte membrane for a fuel cell comprising a polymer blend of four poly(aryl ether sulfone)s having different degrees of sulfonation of 45 to 55%, 35 to 45%, 25 to 35% and 15 to 25%, the difference in degree of sulfonation between the poly(aryl ether sulfone)s being at least 5 to 40%.
An electrolyte membrane for a fuel cell comprising:
An electrolyte membrane for a fuel cell comprising:
Dependencies are inferred from the claim text.