期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 136, 期 34, 页码 -出版社
WILEY
DOI: 10.1002/app.47892
关键词
agglomeration; graphene oxide; high temperature fuel cells; imidized graphene oxide; proton exchange membrane; sulfonated polybenzimidazole
资金
- China Scholarship Council (CSC)
- National Science Foundation of China [21776034, 21476044, 21406031]
- National Key Research and Development Program of China [2016YFB0101203]
- National Natural Science Foundation of China [U1663223]
- Changjiang Scholars Program [T2012049]
The sulfonated polybenzimidazole (sPBI)/sulfonated imidized graphene oxide (SIGO) was evaluated to be a potential candidate for high temperature proton exchange membranes fuel cells (HT-PEMFCs). Multifunctionalized covalently bonded SIGO is incorporated in sPBI matrix to resolve the drawbacks such as low proton conductivity, poor water uptake, and ion-exchange capacity (IEC) of sPBI polymer, synthesized by direct polycondensation in phosphoric acid for the application of proton exchange membranes. Strong hydrogen bonding among multifunctional groups established a neighborhood of interconnected hydrophobic graphene sheets and organic polymer chains. It provides hydrophobic-hydrophilic phase separation and facile proton hopping architecture. The optimized sPBI/SIGO (15 wt %) revealed 2.45 meq g(-1) IEC; 5.81 mS cm(-1) proton conductivity [120 degrees C and 10% relative humidity (RH)] and 2.45% bound water content. The maximum power density of the sPBI/SIGO-15 membrane was 0.40 W cm(-2) at 160 degrees C (5% RH) and ambient pressure with stoichiometric feed of H-2/air. This recommends that sPBI/SIGO composite membranes are compatible candidate for HT-PEMFCs. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47892.
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