Quote Originally Posted by mwmkravchenko View Post
I was reading on compressed CO2 "battery" a while back and it is being made in Spain for storage purposes for a large solar voltaic array. Like anything large and expensive.
The issue with any kind of mechanical storage device is its capacity is measured in watts not megawatts. It will take the chemists and physicists working together to develop high density storage devices, making and breaking bonds. Unfortunately, even with our chemical devices we are still stuck in incremental improvements. We need orders of magnitude. Even one order of magnitude would be earth shattering.