The effects of CaO and waste lithium foil on the aluminum-water reaction are investigated in this study. When CaO and waste lithium foil are added to deionized water, the pH of the solution rises above 12 and the Al-H2O reaction is noticeably affected. Two rapid hydrogen generation processes and a passivation process are observed in CaO/Ca(OH)(2) suspension. A slow reaction follows the rapid hydrogen generation in LiOH solution. At the beginning of the process, the rapid reaction in CaO/Ca(OH)(2) suspension and LiOH solution corresponds the rapid consumption of OH-ions. A similar tendency as the hydrogen generation process in CaO/Ca(OH)(2) is detected by the in-situ open circuit potential. Solutions of LiOH and CaO/Ca(OH)(2) initially present a difference in the rate of hydrogen generation, but they demonstrate a similar behavior after the consecutive addition of Al batches. This may be due to the synergistic reaction of OH-ions and the self-catalytic behavior of Al(OH)(3), formed as a by product of the reaction.