质子
电导率
膜
纳米纤维
基础(拓扑)
离子交换
化学
离子
材料科学
质子交换膜燃料电池
化学工程
纳米技术
有机化学
生物化学
物理化学
物理
工程类
量子力学
数学分析
数学
作者
Guodong Zhao,Xianlin Xu,Lei Shi,Bowen Cheng,Yan Yin
标识
DOI:10.1016/j.jpowsour.2020.227839
摘要
Abstract Regulating nanophase-separation behavior and constructing ion-nanochannels is of great importance for improving proton transport inside membrane. Herein, a novel strategy is proposed for constructing long-range and consecutive acid–base ion-nanochannels through embedding basic l -Arginine biofunctionalized hydrolyzed polyacrylonitrile nanofibers into acidic sulfonated polysulfone matrix, combing the superiority of the special three-dimensional network structure of nanofibers and the function of basic l -Arginine as proton-conductors. The formed acid–base ion-nanochannels between –SO3H of sulfonated polysulfone and –NH2 of l -Arginine biofunctionalized hydrolyzed polyacrylonitrile nanofibers may offer the abundant hydrogen-bonded networks for proton hopping. The results show nanofiber hybrid proton exchange membranes can achieve 0.216 S/cm (80 °C, 100% relative humidity) proton conductivity and 115.93 mW/cm2 power density for fuel-cell performance. Besides, the preponderance of three-dimensional network structure of nanofibers may considerably facilitate the thermal and dimensional stability as well as restrict methanol crossover for hybrid proton exchange membranes. This approach brings a unique vision for preparing high-performance proton exchange membranes for direct methanol fuel cells.
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