Evolution of bromine gas in the positive half cell of the Generation 2 (G2) vanadium bromide (V/Br) battery during charging is a concern which can be resolved by the use of bromine complexing agents. In this paper, for the first time, we report the effect of the addition of two quaternary ammonium bromides; N-ethyl-N-methyl-morpholinium bromide (MEM) and N-ethyl-N-methyl-pyrrolidinium bromide (MEP) to the positive and negative half cell electrolytes of the V/Br. Cyclic voltammetry (CV), linear sweep voltammetry and electrochemical impedance spectroscopy (EIS) studies showed that the addition of MEM–MEP effectively reduce Br₂ vapours. Although the presence of MEM and MEP did not affect the mechanism of the electrode reactions, performance tests conducted in lab scale V/Br cells employing the VF11 cation exchange membrane resulted in lower average cell efficiencies possibly due to the increase in membrane resistance caused by membrane fouling.

人们担心在充电过程中第二代（G2）钒化钒（V / Br）电池的正极半电池中会产生溴气，这可以通过使用溴络合剂来解决。在本文中，我们首次报道了添加两种季铵溴化物的效果。N-乙基-N-甲基-吗啉溴化物（MEM）和N-乙基-N-甲基-吡咯烷溴化物（MEP）连接到V / Br的正极和负极半电池。循环伏安法（CV），线性扫描伏安法和电化学阻抗谱（EIS）研究表明，添加MEM–MEP可有效还原Br ₂蒸气。尽管MEM和MEP的存在不会影响电极反应的机理，但是在实验室规模的采用VF11阳离子交换膜的V / Br电池中进行的性能测试导致平均电池效率较低，这可能是由于膜引起的膜电阻增加所致。结垢。