Krishnan, N. N. Kim, H. -J. Prasanna, M. Cho, E. Shin, E. -M. Lee, S. -Y. Oh, I. -H. Hong, S. -A. Lim, T. -H. 2024-01-21T02:33:48Z 2024-01-21T02:33:48Z 2021-09-01 2006-08-25 0378-7753 https://pubs.kist.re.kr/handle/201004/135233 Sulfonated poly(ether sulfone) copolymers (PESs) are synthesized using hydroquinone 2-potassium sulfonate (HPS) with other monomers (bisphenol A and 4-fluorophenyl sulfone). A series of PESs with different mol% of hydrophilic group is prepared by changing the mole ratio of HPS in the polymerization reaction. The chemical structure and thermal stability of the polymers are characterized by using H-1 NMR, FT-IR and TGA techniques. The PES 60 membrane, which has 60 mol% of HPS unit in the polymer backbone, has a proton conductivity of 0.091 S cm(-1) and good insolubility in boiling water. The TGA showed that PES 60 is stable up to 272 degrees C with a char yield of about 29% at 900 degrees C under a nitrogen atmosphere. To investigate single-cell performance, a catalyst-coated PES 60 membrane is used together with hydrogen and oxygen as the fuel and the oxidant, respectively. Cell performance is enhanced by increasing the temperature. A current density of 1400 mA cm(-2) at 0.60 V is obtained at 70 degrees C. (c) 2005 Elsevier B.V. All rights reserved. English ELSEVIER POLY(ARYLENE ETHER SULFONE) PROTON KETONE) POLYMERS Synthesis and characterization of sulfonated poly(ether sulfone) copolymer membranes for fuel cell applications Article 10.1016/j.jpowsour.2005.09.064 1 JOURNAL OF POWER SOURCES, v.158, no.2, pp.1246 - 1250 JOURNAL OF POWER SOURCES 158 2 1246 1250 scie scopus 000240842800064 2-s2.0-33748120008 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article POLY(ARYLENE ETHER SULFONE) PROTON KETONE) POLYMERS co-polymer membrane-electrode assembly fuel cell sulfonated poly(ether sulfone) proton conductivity