Abstract
In this study, the effect of chrysanthemum coronarium leaves extract (CCLE) in increasing alkaline aluminum-air (Al-air) battery performance is elucidated using hydrogen gas evolution tests, various electrochemical measurements and battery performance tests. CCLE additive displays the outstanding corrosion inhibition effect on the Al anode through the formation of a protective film on the Al surface. The surface morphology of Al is assessed by scanning electron-microscopy (SEM), and atomic force microscopy (AFM). Fourier transform infrared (FT-IR) spectroscopy, and x-ray photoelectron spectroscopy (XPS) are applied to disclose the chemical composition of the extract as well as formation mechanism of the protective film on the Al surface. This film is caused by the electrostatic interactions, hydro-bonds and/or a combination of these between the extract molecules and aluminum surface. The presence of this film advances the capacity density of battery up to 2941.18 mAh g -1, increases three fold compared to a 4 M NaOH solution. Also, the electrochemical activity of the Al electrode is improved significantly.
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