Journal
RENEWABLE ENERGY
Volume 138, Issue -, Pages 1104-1113Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2019.02.042
Keywords
Sulfonated poly (aryl ether ketone sulfone); Multiple sulfonic side chains; Proton exchange membranes; Proton conductivity; Fuel cells
Funding
- National Natural Science Foundation of China [51803011, 51603017, 51673030]
- Jilin Provincial Science & Technology Department [20160520138JH, 20160519020JH]
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The synthesis and properties of novel cross-linked composite sulfonated poly (aryl ether ketone sulfone) containing multiple sulfonic side chains as proton exchange membranes were investigated. The multiple side-chain membranes were prepared by direct polycondensation and simple free radical reaction. The cross-linked composite membranes were prepared by solvent coating method. The prepared membranes showed lower water absorption and swelling ratio than that of Nafion 117. The S-Am-2.0/C exhibited the highest proton conductivity of 0.135 S cm(-1) at 80 degrees C, while its swelling ratio was only 3.59% at the same temperature. Much lower methanol permeability coefficients in the range of 3.11 x 10(-8) cm(2)s(-1)-7.25 x 10(-7) cm(2)s(-1) compared to Nafion 117 (2.29 x 10(-8) cm(2)s(-1)) were also observed for the prepared membranes. Moreover, the S-Am-2.0/C exhibited higher peak power density (121.09 mW cm(-2)) than that of main-chain type C-SPAEKS membrane (66.65 mW cm(-2)). The results indicate that the cross-linked composite membranes are good candidate for fuel cells. (C) 2019 Elsevier Ltd. All rights reserved.
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