TY - JOUR
T1 - Novel epoxy-based cross-linked polybenzimidazole for high temperature proton exchange membrane fuel cells
AU - Wang, Shuang
AU - Zhang, Gang
AU - Han, Miaomiao
AU - Li, Hongtao
AU - Zhang, Yang
AU - Ni, Jing
AU - Ma, Wenjia
AU - Li, Mingyu
AU - Wang, Jing
AU - Liu, Zhongguo
AU - Zhang, Liyuan
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 - 2011/7
Y1 - 2011/7
N2 - An approach has been proposed to prepare the reinforced phosphoric acid (PA) doped cross-linked polybenzimidazole membranes for high temperature proton exchange membrane fuel cells (HT-PEMFCs), using 1,3-bis(2,3-epoxypropoxy)-2,2- dimethylpropane (NGDE) as the cross-linker. FT-IR measurement and solubility test showed the successful completion of the crosslinking reaction. The resulting cross-linked membranes exhibited improved mechanical strength, making it possible to obtain higher phosphoric acid doping levels and therefore relatively high proton conductivity. Moreover, the oxidative stability of the cross-linked membranes was significantly enhanced. For instance, in Fenton's reagent (3% H2O2 solution, 4 ppm Fe2+, 70 °C), the cross-linked PBI-NGDE-20% membrane did not break into pieces and kept its shape for more than 480 h and its remaining weight percent was approximately 65%. In addition, the thermal stability was sufficient enough within the operation temperature of PBI-based fuel cells. The cross-linked PBI-NGDE-X% (X is the weight percent of epoxy resin in the cross-linked membranes) membranes displayed relatively high proton conductivity under anhydrous conditions. For instance, PBI-NGDE-5% membrane with acid uptake of 193% exhibited a proton conductivity of 0.017 S cm-1 at 200 °C. All the results indicated that it may be a suitable candidate for applications in HT-PEMFCs.
AB - An approach has been proposed to prepare the reinforced phosphoric acid (PA) doped cross-linked polybenzimidazole membranes for high temperature proton exchange membrane fuel cells (HT-PEMFCs), using 1,3-bis(2,3-epoxypropoxy)-2,2- dimethylpropane (NGDE) as the cross-linker. FT-IR measurement and solubility test showed the successful completion of the crosslinking reaction. The resulting cross-linked membranes exhibited improved mechanical strength, making it possible to obtain higher phosphoric acid doping levels and therefore relatively high proton conductivity. Moreover, the oxidative stability of the cross-linked membranes was significantly enhanced. For instance, in Fenton's reagent (3% H2O2 solution, 4 ppm Fe2+, 70 °C), the cross-linked PBI-NGDE-20% membrane did not break into pieces and kept its shape for more than 480 h and its remaining weight percent was approximately 65%. In addition, the thermal stability was sufficient enough within the operation temperature of PBI-based fuel cells. The cross-linked PBI-NGDE-X% (X is the weight percent of epoxy resin in the cross-linked membranes) membranes displayed relatively high proton conductivity under anhydrous conditions. For instance, PBI-NGDE-5% membrane with acid uptake of 193% exhibited a proton conductivity of 0.017 S cm-1 at 200 °C. All the results indicated that it may be a suitable candidate for applications in HT-PEMFCs.
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U2 - 10.1016/j.ijhydene.2011.03.147
DO - 10.1016/j.ijhydene.2011.03.147
M3 - Article
AN - SCOPUS:79958152230
SN - 0360-3199
VL - 36
SP - 8412
EP - 8421
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 14
ER -
