There’s plenty of aluminum in the world (it’s 8% of earth’s crust by mass).
++++++++++++++++++++++++++++++
Extracting it into elemental aluminum is a very energy-intensive process.
I don’t know if these batteries use elemental aluminum, but I bet the Al starts out that way. The good thing about aluminum is that it is easily recycled. (Don’t know about the battery compounds..)
Aluminum is one material that makes sense to recycle..
The corrosion factor is a bottleneck for some time. If you want to experiment, hydrogen, if you want to get close to optimization, stick with fossil fuels. Batteries have a lot of unintentional expensive consequences in an economy that is petering out via massive debt and wage gaps.
Being an “aluminum-ion” battery I’m just assuming it uses aluminum instead of lithium.