Examination of amine-functionalised anion-exchange membranes for possible use in the all-vanadium redox flow battery
Examination of amine-functionalised anion-exchange membranes for possible use in the all-vanadium redox flow battery
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DOI：
10.1016/j.electacta.2014.06.058
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发表时间：
2014-09
影响因子：
6.6
通讯作者：
Sarah L. Mallinson;J. Varcoe;R. Slade
中科院分区：
文献类型：
--
作者：
Sarah L. Mallinson;J. Varcoe;R. Slade
研究了胺功能化阴离子交换膜（AEMs）在全钒氧化还原液流电池中的适用性。用二甲胺、三甲胺或重氮双环（2,2,2）辛烷功能化的辐射接枝胺化膜进行了广泛的测试。每个接枝过程的成功都通过拉曼光谱和红外光谱，滴定法和离子电导率测量来证实。胺功能化膜具有较差的热氧化稳定性和较高的钒离子渗透性。研究结果强调了平衡离子电导率和钒阳离子渗透性的重要性，并表明在全钒氧化还原液流电池中，胺基官能团可能不太稳定，无法使膜保持真正的AEMs。
The applicability of amine-functionalised anion-exchange membranes (AEMs) for use in the all-vanadium redox flow battery has been studied. A selection of radiation-grafted aminated membranes functionalised with dimethylamine, trimethylamine or diazabicyclo(2,2,2)octane were extensively tested. The success of each grafting process was confirmed by Raman and infrared spectroscopies, titrimetry and ionic conductivity measurements. The amine-functionalised membranes were found to have poor thermo-oxidative stability and high vanadium cation permeabilities. The results highlight the importance of balancing ionic conductivity with vanadium cation permeability and indicate that amine-based functional groups may not be suitably stable for the membranes to remain true AEMs when in use in the all-vanadium redox flow battery.