| abstract |
The invention concerns a high power capacitor ideally polarizable consisting of a positive electrode ( 2 ) and its current collector ( 4 ), a negative electrode ( 3 ) and its current collector ( 5 ), said electrodes comprising a carbon containing material with high specific surface area, a separator ( 6 ) and a non-aqueous liquid electrolyte impregnating said separator and said electrodes. The invention is characterised in that the non-aqueous liquid electrolyte is an organic solution of a sodium or potassium or alkalin-earth metal salt, on their own or mixed in a solvent containing an acid. |