4.6 Article

Modified silicon carbide whisker reinforced polybenzimidazole used for high temperature proton exchange membrane

期刊

JOURNAL OF ENERGY CHEMISTRY
卷 27, 期 3, 页码 820-825

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.jechem.2017.05.002

关键词

Polybenzimidazole; Silicon carbide whisker; Phosphoric acid doping; Proton exchange membrane; Proton conductivity

资金

  1. Kunlun Scholar Award Program of Qinghai Province
  2. Fundamental Research Funds for the Central Universities [WD1315012]

向作者/读者索取更多资源

Polybenzimidazole containing ether bond (OPBI) was reinforced with silicon carbide whisker (mSiC) modified by 3-aminopropyltriethoxysilane (KH550), and then doped with phosphoric acid (PA) to obtain OPBI/mSiC/PA membranes. These OPBI/mSiC/PA membranes have excellent mechanical strength and oxidative stability and can be used for high temperature proton exchange membrane (HT-PEM). The tensile strength of OPBI/mSiC/PA membranes ranges from 27.3 to 36.8 MPa, and it increases at first and then decreases with the increase of mSiC content. The high mSiC content and PA doping level contribute to improving the proton conductivity of membranes. The proton conductivity of PBI/mSiC-10/PA membrane is 27.1 mS cm(-1) at 170 degrees C without humidity, with an increase of 55.7% compared with that of OPBI/PA membrane. These excellent properties make OPBI/mSiC/PA membranes promising membrane materials for HT-PEM applications. (C) 2017 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

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