Choi, S. W. Fu, Y. -Z. Ahn, Y. R. Jo, S. M. Manthiram, A. 2024-01-20T23:05:40Z 2024-01-20T23:05:40Z 2021-09-03 2008-05-15 0378-7753 https://pubs.kist.re.kr/handle/201004/133488 Composite membranes consisting of polyvinylidene fluoride (PVdF) and Nafion have been prepared by impregnating various amounts of Nafion (0.3-0.5 g) into the pores of electrospun PVdF (5 cm x 5 cm) and characterized by scanning electron microscopy, differential scanning calorimetry, X-ray diffraction, and proton conductivity measurements. The characterization data suggest that the unique three-dimensional network structure of the electrospun PVdF membrane with fully interconnected fibers is maintained in the composite membranes, offering adequate mechanical properties. Although the composite membranes exhibit lower proton conductivity than Nafion 115, the composite membrane with 0.4 g Nafion exhibits better performance than Nafion 115 in direct methanol fuel cell (DMFC) due to smaller thickness and suppressed methanol crossover from the anode to the cathode through the membrane. With the composite membranes, the cell performance increases on going from 0.3 to 0.4 g Nafion and then decreases on going to 0.5 g Nafion due to the changes in proton conductivity. (C) 2008 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV POLYMER ELECTROLYTE MEMBRANES NANOFIBERS CROSSOVER Nafion-impregnated electrospun polyvinylidene fluoride composite membranes for direct methanol fuel cells Article 10.1016/j.jpowsour.2008.02.042 1 JOURNAL OF POWER SOURCES, v.180, no.1, pp.167 - 171 JOURNAL OF POWER SOURCES 180 1 167 171 scie scopus 000256069900019 2-s2.0-41949112872 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article POLYMER ELECTROLYTE MEMBRANES NANOFIBERS CROSSOVER direct methanol fuel cell composite membrane electrospun membrane methanol crossover fuel cell performance