Performance of Aluminum-Air Battery in Mixed Solutions between NaOH and NaCl
Keywords:
aluminum-air battery, mixed solution, self-corrosion, energy densityAbstract
This research is aimed at studying the performance of aluminum-air battery at various mixed ratios of sodium hydroxide and sodium chloride solutions. The self-corrosion of Al anodes and electrochemical behavior of electrodes was tested in the mixed solutions at 25 OC. Surface Morphology and crystalline phases of the electrodes after the tests were characterized systematically by field emission scanning electron microscope and X-ray diffraction. The results indicate that the using of mixed solutions between sodium hydroxide and sodium chloride can significantly decrease the self-corrosion of Al anode and increase the energy density of aluminum-air battery by 6 folds compared with that of a conventional alkaline Al-air cell. These resulted from the decreasing of parasitic reaction at aluminum anode and the decreasing of carbonate precipitation at air electrode.
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