High energy rechargeable Aluminum batteries

AI Thread Summary
The discussion centers on the potential of high energy density rechargeable aluminum-based batteries, specifically those utilizing reactions between aluminum and metals like iron and oxygen. Questions arise regarding the rechargeability of these batteries, particularly in light of the stability of aluminum oxide (Al2O3), which is a product of the reaction and is known to be difficult to decompose. Participants express confusion about the mechanisms that would allow for rechargeability, especially when comparing aluminum-iron reactions to non-rechargeable aluminum-air batteries. The conversation highlights the need for clarity on what defines a battery's rechargeability, noting that factors such as the solubility of byproducts and the differing potentials required for ions play critical roles. The discussion emphasizes the complexity of aluminum-based battery chemistry and the challenges in achieving a reversible reaction.
Stanley514
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In this article http://www.adlabs.com/library/battery.html" (read PDF) an author proposes high energy density rechargeable aluminum-based batteries.They are based on reaction of Aluminum with Iron (or other metals) and oxygen.I still trying to understand why autor is so sure that such type of batteries going to be rechargeable and what is sense to use some other metal (such as Iron) in reaction.
For example: 2Al+Fe2O3 »» Al2O3+Fe2. Is it going to be rechargeable?If yes, why than
Al-air primary battery is non-rechargeable?
 
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Reaction is not different from the one used in termite, two metals are present to make use of their different affinity to oxygen.

No idea about rechargeability, but I have not read the paper. In general Al2O3 is very stable, so difficult to decompose.
 
What aluminum-based batteries supposed to be rechargeable?
For example Aluminum-Iodine is rechargeable?
With what metals aluminum could react reversibly?
 
In general Al2O3 is very stable, so difficult to decompose.
What defines rechargebility of battery?For example if Al2O3 whould be soluble in water
or some other liquid,does it mean it would be rechargeable?
 
No Anion and Cations require differing potentials to be soluble and recoverable , Ie: see Electroplating.
 

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