A novel polybenzimidazole composite modified by sulfonated graphene oxide for high temperature proton exchange membrane fuel cells in anhydrous atmosphere

作者：Cai, Yangben; Yue, Zhouying; Xu, Shiai^*

来源：Journal of Applied Polymer Science, 2017, 134(25): 44986.

DOI：10.1002/APP.44986

• high temperature proton exchange membrane
• phosphoric acid doping
• polybenzimidazole
• radiation grafting graphene oxide

A novel functional graphene with high ion exchange capacity (IEC) was prepared by grafting reaction induced by Co-60 gamma-ray irradiation using graphene oxide. Then, polybenzimidazole/radiation grafting graphene oxide (PBI/RGO) composite membranes were prepared by the solution-casting method and doped with phosphoric acid (PA) to improve their proton conductivity. The properties of PBI/GO/PA and PBI/RGO/PA membranes including the PA doping level, chemical stability, proton conductivity and mechanical properties were evaluated and compared. The tensile strength of PBI/RGO/PA membranes (ranging from 27.3 to 38.5 MPa) increases at first and then decreases with the increase of the RGO content, and is significantly higher than that of other PA doped PBI-based membranes. The proton conductivity of PBI/RGO-3/PA membrane is 28.0 mS cm(-1) at 170 degrees C without humidity, with an increase of 72.0% compared with that of PBI/PA membrane. These results suggest that PBI/RGO/PA membranes have the potential to be used as high-temperature proton exchange membranes.

• 出版日期2017-7-5
• 单位华东理工大学; 青海大学