The present invention relates to an alkaline aluminum-air battery
composite electrolyte and its additive and preparation method, the
composite electrolyte includes a
sodium hydroxide solution and the additive, the rest is water, the additive includes 8-hydroxyquinoline and
decyl glucoside, the concentration of the
sodium hydroxide solution is 2-7M, the concentration of the 8-hydroxyquinoline is 2-10mM, the concentration of the
decyl glucoside is 1-4mM, preferably the concentration of 8-hydroxyquinoline is 10mM, and the effect is best when the concentration of
decyl glucoside is 3mM; the preparation method is specifically: preparing a
sodium hydroxide solution, cooling, adding 8-hydroxyquinoline, ultrasonically dissolving it completely, then adding decyl
glucoside, stirring and mixing evenly. Compared with the prior art, the present invention enhances the
corrosion inhibition effect of the additive through a synergistic effect, improves the
utilization rate of the
aluminum anode, and after electrochemical testing, the best
corrosion inhibition efficiency of the present invention can reach 85.3%, and the
anode utilization rate is increased to 92.5%. The sources of the components in the additive are wide and non-toxic, suitable for large-scale use, and
environmentally friendly.