The BIGGEST problem with clean energy

"The supply of lithium will run out by 2080" Riiiight because it's not like we can recycle lithium or anything like that. Oh, wait, no. We can recycle lithium and all the other parts of batteries.
Besides, lithium batteries sit between the fuel cell and motor in these FCEVs that Toyota has paid you to push, so poo-pooing them doesn't seem wise.

Thanks for mentioning liquid air power storage.

"Hydrogen is very abundant, just look at all those oceans" but can we just electrolyze ocean water? Nope. You need to desalinate and purify it first, otherwise you start vaporizing chlorine and other stuff. 

Liquid metal batteries? Iron phosphate batteries? Aluminum or iron air batteries? Kinetic storage? Dropshaft storage? Molten salt? There are many more storages besides these, I guess you wanted to keep this video short. 

Just pumping H2 in the natural gas pipes already existing is a terrible idea. It would leak like a sieve and gaseous H2 isn't very energy dense. There's no way existing infrastructure would handle the tens of thousands of PSI that liquid H2 needs to be stored at. 

That thermal battery was interesting, but using PV to get the power out seems weird. Why not a Stirling engine, or even just thermal-voltaic if you want to keep it small scale? 

This video was not as bad as the others in this series.