膜
硅氧烷
高分子化学
磷酸
烷基
硅烷
材料科学
化学工程
亚苯基
共价键
质子交换膜燃料电池
兴奋剂
化学
聚合物
有机化学
复合材料
生物化学
工程类
冶金
光电子学
作者
Jingshuai Yang,Liping Gao,Jin Wang,Yan Xu,Chao Liu
标识
DOI:10.1002/macp.201700009
摘要
Two silane compounds, i.e., ((chloromethyl)phenylethyl)trimethoxysilane (Ph‐Si) and 3‐chloropropyltriethoxysilane (Pr‐Si), are employed as covalent crosslinkers to fabricate high temperature proton exchange membranes based on polybenzimidazole (PBI) in order to better understand the correlation between the structure and the property of the crosslinked membranes. All the crosslinked PBI membranes display longer morphology durability over the neat PBI membrane toward the radical oxidation. The crosslinked membranes with the crosslinker containing a rigid group of phenylene (PBI‐Ph) show superior acid doping level, high conductivity, and excellent mechanical strength simultaneously, comparing to those with the crosslinker having a flexible alkyl chain (PBI‐Pr) and the pristine PBI based membrane. The technical feasibility for using as high temperature proton exchange membranes is demonstrated by the acid doped crosslinked PBI‐Ph membranes via fuel cell tests. image
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