TY - JOUR
T1 - Cross-linked tri-side chains poly(arylene ether ketone)s containing pendant alkylsulfonic acid groups for proton exchange membranes
AU - Zhang, Liyuan
AU - Zhang, Gang
AU - Zhao, Chengji
AU - Jiang, Hao
AU - Wang, Jing
AU - Xu, Dan
AU - Zhang, Yang
AU - Shao, Ke
AU - Liu, Zhongguo
AU - Ma, Wengjia
AU - Li, Hongtao
AU - Li, Mingyu
AU - Wang, Shuang
AU - Na, Hui
N1 - Funding Information:
This work was supported by the National Nature Science Foundation of China (Grant Nos. 21074044 and 51101073 ) and Science and Technology Development Plan of Jilin Province (Grant No. 20100110 ) and Special Fund for Basic Scientific Research of Central Colleges, Jilin University (No. 201103088 ).
PY - 2012/3/1
Y1 - 2012/3/1
N2 - In order to enhance the ion exchange capacity (IEC) in the proton exchange membrane materials, a novel sulfonated poly(arylene ether ketone) (SQNPAEK) containing tri-side chains in one unit is synthesized by direct polymerization. The SQNPAEK membrane shows excellent proton conductivity up to 0.102 S cm -1 at 80 °C, which are superior to previous side-chain-type and main-chain-type sulfonated polymer membranes at similar IEC. Cross-linked membranes are then obtained by a heating reaction at 190 °C, using 4,4′-diglycidyl (3,3′,5,5′-tetramethylbiphenyl) epoxy resin (TMBP) as the cross-linker. As expected, the water uptake and the methanol permeability of the cross-linked membranes decrease with increasing the content of TMBP. Compared to Nafion 117, the cross-linked membranes show comparable proton conductivities and much higher selectivities, which are in the range of 5.18 × 10 5-1.46 × 10 6 S s -1 cm 3. Other properties of the cross-linked membranes, such as mechanical properties, thermal properties, are also investigated. All the results indicated that the cross-linked membranes based on SQNPAEKs and TMBP are promising candidate for direct methanol fuel cells.
AB - In order to enhance the ion exchange capacity (IEC) in the proton exchange membrane materials, a novel sulfonated poly(arylene ether ketone) (SQNPAEK) containing tri-side chains in one unit is synthesized by direct polymerization. The SQNPAEK membrane shows excellent proton conductivity up to 0.102 S cm -1 at 80 °C, which are superior to previous side-chain-type and main-chain-type sulfonated polymer membranes at similar IEC. Cross-linked membranes are then obtained by a heating reaction at 190 °C, using 4,4′-diglycidyl (3,3′,5,5′-tetramethylbiphenyl) epoxy resin (TMBP) as the cross-linker. As expected, the water uptake and the methanol permeability of the cross-linked membranes decrease with increasing the content of TMBP. Compared to Nafion 117, the cross-linked membranes show comparable proton conductivities and much higher selectivities, which are in the range of 5.18 × 10 5-1.46 × 10 6 S s -1 cm 3. Other properties of the cross-linked membranes, such as mechanical properties, thermal properties, are also investigated. All the results indicated that the cross-linked membranes based on SQNPAEKs and TMBP are promising candidate for direct methanol fuel cells.
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U2 - 10.1016/j.jpowsour.2011.11.004
DO - 10.1016/j.jpowsour.2011.11.004
M3 - Article
AN - SCOPUS:83655181077
SN - 0378-7753
VL - 201
SP - 142
EP - 150
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
