Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7737575 | Journal of Power Sources | 2014 | 7 Pages |
Abstract
Phosphoric acid doped polybenzimidazole (PBI)/imidazolium-modified silsesquioxane (Im-SiO3/2) hybrid membranes with high proton conductivity at high temperature under anhydrous conditions are synthesized and characterized. The presence of Im-SiO3/2 is confirmed by FT-IR and energy-dispersive X-ray spectroscopy (EDS) mapping of silicon element. The phosphoric acid uptake and proton conductivity of the hybrid membranes increase with the Im-SiO3/2 content, and the conductivity of PBI/Im-SiO3/2-20 reaching 6.3 Ã 10â2 S cmâ1 at 180 °C. Compared with pure PBI membranes, the introduction of Im-SiO3/2 is effective in preventing the release of the phosphoric acid component from the hybrid membranes. The properties of the prepared hybrid membranes indicate their promising prospects in anhydrous proton exchange membrane applications.
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Authors
Bencai Lin, Fuqiang Chu, Ningyi Yuan, Hui Shang, Yurong Ren, Zongzong Gu, Jianning Ding, Yingqiang Wei, Xiaomin Yu,