TY - JOUR
T1 - Sulfonated poly(ether ether ketone)/polybenzimidazole oligomer/epoxy resin composite membranes in situ polymerization for direct methanol fuel cell usages
AU - Han, Miaomiao
AU - Zhang, Gang
AU - Li, Mingyu
AU - Wang, Shuang
AU - Liu, Zhongguo
AU - Li, Hongtao
AU - Zhang, Yang
AU - Xu, Dan
AU - Wang, Jing
AU - Ni, Jing
AU - Na, Hui
N1 - Funding Information:
This work was supported by the National Nature Science Foundation of China (Grant No. 21074044 ) and Science and Technology Development Plan of Jilin Province (Grant No. 20100110 ).
PY - 2011/12/1
Y1 - 2011/12/1
N2 - A diamine-terminated polybenzimidazole oligomer (o-PBI) has been synthesized for introducing the benzimidazole groups (BI) into sulfonated poly(ether ether ketone) (SPEEK) membranes. SPEEK/o-PBI/4,4′-diglycidyl(3, 3′,5,5′-tetramethylbiphenyl) epoxy resin (TMBP) composite membranes in situ polymerization has been prepared for the purpose of improving the performance of SPEEK with high ion-exchange capacities (IEC) for the usage in the direct methanol fuel cells (DMFCs). The composite membranes with three-dimensional network structure are obtained through a cross-linking reaction between PBI oligomer and TMBP and the acid-base interaction between sulfonic acid groups and benzimidazole groups. Resulting membranes show a significantly increasing of all of the properties, such as high proton conductivity (0.14 S cm-1 at 80 °C), low methanol permeability (2.38 × 10-8 cm2 s-1), low water uptake (25.66% at 80 °C) and swelling ratio (4.11% at 80 °C), strong thermal and oxidative stability, and mechanical properties. Higher selectivity has been found for the composite membranes in comparison with SPEEK. Therefore, the SPEEK/o-PBI/TMBP composite membranes show a good potential in DMFCs usages.
AB - A diamine-terminated polybenzimidazole oligomer (o-PBI) has been synthesized for introducing the benzimidazole groups (BI) into sulfonated poly(ether ether ketone) (SPEEK) membranes. SPEEK/o-PBI/4,4′-diglycidyl(3, 3′,5,5′-tetramethylbiphenyl) epoxy resin (TMBP) composite membranes in situ polymerization has been prepared for the purpose of improving the performance of SPEEK with high ion-exchange capacities (IEC) for the usage in the direct methanol fuel cells (DMFCs). The composite membranes with three-dimensional network structure are obtained through a cross-linking reaction between PBI oligomer and TMBP and the acid-base interaction between sulfonic acid groups and benzimidazole groups. Resulting membranes show a significantly increasing of all of the properties, such as high proton conductivity (0.14 S cm-1 at 80 °C), low methanol permeability (2.38 × 10-8 cm2 s-1), low water uptake (25.66% at 80 °C) and swelling ratio (4.11% at 80 °C), strong thermal and oxidative stability, and mechanical properties. Higher selectivity has been found for the composite membranes in comparison with SPEEK. Therefore, the SPEEK/o-PBI/TMBP composite membranes show a good potential in DMFCs usages.
UR - http://www.scopus.com/inward/record.url?scp=80053567686&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053567686&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2011.08.049
DO - 10.1016/j.jpowsour.2011.08.049
M3 - Article
AN - SCOPUS:80053567686
SN - 0378-7753
VL - 196
SP - 9916
EP - 9923
JO - Journal of Power Sources
JF - Journal of Power Sources
IS - 23
ER -
