TY - JOUR
T1 - Cross-linked polyelectrolyte for direct methanol fuel cells applications based on a novel sulfonated cross-linker
AU - Li, Mingyu
AU - Zhang, Gang
AU - Xu, Shuai
AU - Zhao, Chengji
AU - Han, Miaomiao
AU - Zhang, Liyuan
AU - Jiang, Hao
AU - Liu, Zhongguo
AU - Na, Hui
N1 - Funding Information:
This work was supported by the National Nature Science Foundation of China (Grant no. 21074044 & 51101073 & 21104022 ) and Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20100061110011 & 20110061120019 ) and Special Fund for Basic Scientific Research of Central Colleges (No. 201103088 ).
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/6/1
Y1 - 2014/6/1
N2 - A novel type of cross-linked proton exchange membrane of lower methanol permeation and high proton conductivity is prepared, based on a newly synthesized sulfonated cross-linker: carboxyl terminated benzimidazole trimer bearing sulfonic acid groups (s-BI). Compared to membranes cross-linked with non-sulfonated cross-linker (BI), SPEEK/s-BI-n membranes show higher IEC values and proton conductivities. Meanwhile, oxidative stability and mechanical property of SPEEK/s-BI-n membranes are obviously improved. Among SPEEK/s-BI-n membranes, SPEEK/s-BI-2 exhibits high proton conductivity, low swelling ratio (0.122 S cm-1 and 15.2% at 60 C, respectively) and low methanol permeability coefficient. These results imply that the cross-linked membranes prepared with the newly sulfonated cross-linker are promising for the direct methanol fuel cells (DMFCs) application.
AB - A novel type of cross-linked proton exchange membrane of lower methanol permeation and high proton conductivity is prepared, based on a newly synthesized sulfonated cross-linker: carboxyl terminated benzimidazole trimer bearing sulfonic acid groups (s-BI). Compared to membranes cross-linked with non-sulfonated cross-linker (BI), SPEEK/s-BI-n membranes show higher IEC values and proton conductivities. Meanwhile, oxidative stability and mechanical property of SPEEK/s-BI-n membranes are obviously improved. Among SPEEK/s-BI-n membranes, SPEEK/s-BI-2 exhibits high proton conductivity, low swelling ratio (0.122 S cm-1 and 15.2% at 60 C, respectively) and low methanol permeability coefficient. These results imply that the cross-linked membranes prepared with the newly sulfonated cross-linker are promising for the direct methanol fuel cells (DMFCs) application.
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U2 - 10.1016/j.jpowsour.2013.12.116
DO - 10.1016/j.jpowsour.2013.12.116
M3 - Article
AN - SCOPUS:84892752300
SN - 0378-7753
VL - 255
SP - 101
EP - 107
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -