1-Allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide as an effective organic additive in aluminum-air battery. (1st August 2017)

• Record Type: Journal Article
• Authors: Deyab, M.A.
• Is Part Of: Electrochimica acta. Volume 244(2017)
• Page Start: 178
• Page End: 183
• Publication Date: 2017-08-01
• Subjects: Al-air batteries -- Ionic liquid -- Parasitic hydrogen evolution -- Self-corrosion; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.05.116
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: Ionic liquid was studied as an additive for Al-air batteries. IL compound inhibits both H2 gas evolution and self-corrosion of Al electrode. IL compound enhances the capacity density of battery. IL compound has a strong effect on anodic efficiency (93.8% at 1.5 mM). Abstract: 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.