While I am very pleased to see these developments away from Lithium I do think your estimates for Li-po and Li-ion are off by a few generations of batteries.
Lipo can be 200+ /kg density and Li Ion can be 250+ in current, commercially produced, generations of battery cells.
Lipo can be 200+ /kg density and Li Ion can be 250+ in current, commercially produced, generations of battery cells.
I'm not a pro so anyone feel free to correct me.