Ultra-capacitors, NiCad, LiIon, ZincAir, etc. Is there a comparison of reliable theoretical limits in Ah/kg?

Question

Ultra-capacitors, NiCad, LiIon, ZincAir, etc. Is there a comparison of reliable theoretical limits in Ah/kg?

Answer 1

Batteries and Capacitors are not sources of energy!  They are just for storage and transfer, useful, yes, but not an answer energy independence.  A more useful attribute relative  weight - capacity.

They just beg the question of where do we get the electrical power for charging!

By the way, capacitors can be mechanical...a reservoir pumped up a hill during peak (wind) perhaps then drained back to drive turbines during peak power demands!

Answer 2

i dont know

Answer 3

see this