Hi guys - I'm researching what seems like a primitive electrolytic capacitor but I need to verify...

Construction: NaCl + Cu + H2O
A large, open glass container nearly filled with rock salt, pieces of copper laid on salt, then container filled with enough water to submerge the copper - and probably charged with natural DC.

All help will be greatly appreciated laugh
PS - if this thing works, it would emit Chlorine gas while effervescing so don't try this at home, kids!

[edited for clarity]