Kang, Na Rae Lee, So Young Shin, Dong Won Hwang, Doo Sung Lee, Kang Hyuck Cho, Doo Hee Kim, Ji Hoon Lee, Young Moo 2024-01-20T04:34:16Z 2024-01-20T04:34:16Z 2021-09-04 2016-03-01 0378-7753 https://pubs.kist.re.kr/handle/201004/124310 A series of end-group cross-linked membranes (Az-XESPSN) were prepared by click reaction to investigate the effects of cross-linking on the morphology and proton transport properties of proton exchange membranes. The morphological transformations resulting from thermal annealing and cross-linking were observed by means of atomic force microscopy (AFM) and transmission electron microscopy (TEM). Compared to the non-cross-linked ESPSN membranes, the Az-XESPSN membranes exhibited lower water uptake and improved mechanical and chemical stabilities. In addition, the Az-XESPSN membranes exhibited higher proton conductivities (0.018-0.028 S cm(-1)) compared to those of the ESPSN membranes (0.0044-0.0053 S cm(-1)) and Nafion 212 (0.0061 S cm(-1)), particularly in conditions of elevated temperature (120 degrees C) and low relative humidity (35%). Such enhancements can be attributed to a synergistic effect of well-defined hydrophilic ionic clusters and triazole groups that function as proton carriers under anhydrous conditions. Furthermore, the Az-XESPSN membranes exhibited significantly enhanced single cell performance and long-term stability compared to those of ESPSN membranes. (C) 2016 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV POLYMER ELECTROLYTE MEMBRANES LINKED IONOMER MEMBRANES LOW RELATIVE-HUMIDITY METHANOL FUEL-CELLS HIGH-TEMPERATURE CONDUCTING MEMBRANES BLEND MEMBRANES MULTIBLOCK COPOLYMERS PERFORMANCE OPERATION Effect of end-group cross-linking on transport properties of sulfonated poly(phenylene sulfide nitrile)s for proton exchange membranes Article 10.1016/j.jpowsour.2016.01.051 1 JOURNAL OF POWER SOURCES, v.307, pp.834 - 843 JOURNAL OF POWER SOURCES 307 834 843 scie scopus 000370884000101 2-s2.0-84955254947 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article POLYMER ELECTROLYTE MEMBRANES LINKED IONOMER MEMBRANES LOW RELATIVE-HUMIDITY METHANOL FUEL-CELLS HIGH-TEMPERATURE CONDUCTING MEMBRANES BLEND MEMBRANES MULTIBLOCK COPOLYMERS PERFORMANCE OPERATION Proton exchange membrane Cross-linking Click reaction Fuel cells