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1-Allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide as an effective organic additive in aluminum-air battery
Electrochimica Acta ( IF 5.5 ) Pub Date : 2017-05-18 , DOI: 10.1016/j.electacta.2017.05.116
M.A. Deyab

In Al-air batteries, the self-corrosion of Al electrodes and the parasitic hydrogen evolution during battery discharge are the major defects that lead to the degradation in the performance of the battery. Here, the ionic liquid (1-Allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) (IL) is used as an organic additive to minimize the H2 gas evolution and corrosion rate in the alkaline electrolyte (4.0 M NaOH) for Al-air battery. The efficiency of IL compound is investigated using H2 gas evolution, polarization, electrochemical frequency modulation (EFM) and battery performance measurements. The surface morphology of Al electrode was characterized by scanning electron microscopy (SEM) coupled with energy dispersive X-ray (EDX) analysis. The results presented below show that the IL compound inhibits both the H2 gas evolution and the self-corrosion of Al electrode. In addition to this, the presence of IL compound enhances the capacity density of battery reaching to the maximum value (2554 mAhg-1) at 1.5 mM of IL.



中文翻译:

1-烯丙基-3-甲基咪唑鎓双(三氟甲基磺酰基)亚胺作为铝-空气电池的有效有机添加剂

在铝空气电池中,铝电极的自腐蚀和电池放电期间的寄生氢放出是导致电池性能下降的主要缺陷。在此,离子液体(1-烯丙基-3-甲基咪唑双(三氟甲基磺酰基)酰亚胺)(IL)用作有机添加剂,可最大程度地减少碱性电解液(4.0 M NaOH)中的H 2气体逸出和腐蚀速率,以防止Al-空气电池。使用H 2研究IL化合物的效率气体逸出,极化,电化学频率调制(EFM)和电池性能测量。铝电极的表面形貌通过扫描电子显微镜(SEM)结合能量色散X射线(EDX)分析进行表征。以下显示的结果表明,IL化合物既抑制了H 2气体的释放,又抑制了Al电极的自腐蚀。除此之外,IL化合物的存在使电池的容量密度达到1.5 mM IL时的最大值(2554 mAhg -1)。

更新日期:2017-05-18
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