Alane is not a friendly chemical, it's pyrophoric and incompatible with water. It can be produced by hydrogenation of aluminum at 10GPa and 600C, rather hellish conditions, or by electrolysis of sodium-aluminum-hydride using a mercury cathode, two more easily handled chemicals.
They do not quote any details, no numbers, and we are supposed to believe they made this process safe and cheap?
So, we are very energy efficient. But no so awesome in terms of energy storage density.
Based on my expert knowledge (As acquired from Wikipedia just now) I agree, it sounds at least as bad as lithium (in terms of exposure to almost anything) and I’m not sure it is more than just a high density hydrogen carrier. It isn’t a “rechargeable” carrier either - so it’s closer to a regular single use battery, with the combustible potential of lithium.
I’m assuming you’re a chemist, so you can tell me how far off the mark I am :)