Electric Energy Storage Using Aluminum and Water for Hydrogen Production On-Demand
Shani Elitzur, Valery Rosenband, Alon Gany

Abstract
The paper analyzes the potential electric energy storage resulting from a hydrogen-oxygen fuel cell fed by in-situ, on-demand production of hydrogen from aluminum-water reaction. The reaction is made practical by an original aluminum activation process using a small fraction (typically 1-2.5wt%) of lithium-based activator. The reaction provides 11% of hydrogen compared to the aluminum mass, with a practical yield of over 90%, which is equivalent to about 2200 Wh/kg Al of electric energy storage when combined with a fuel cell. It is shown that specific electric energy greater by up to 15 fold compared to common batteries may be obtained, depending on the specific application and operating time.

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