Patent ID: 6671166
Filing Date: 2003-12-30
Classification: H01G,Y02E

Abstract:
Ideally polarizable supercapacitor consisting of a positive electrode and its current collector, of a negative electrode and its current collector, said electrodes comprising a carbon material, of a separator and of a nonaqueous liquid electrolyte impregnating said separator and said electrodes, characterized in that the nonaqueous liquid electrolyte is an organic solution of a sodium or potassium salt or an alkaline-earth metal salt, by itself or as a mixture in a solvent comprising one or more amides; andthe solution is based on an aprotic polar solvent comprising an amide of formula: â€ƒin which: R1 is a hydrogen atom or a C1 to C3 alkyl radical, R2, R3, which are identical or different, are the hydrogen atom or a methyl, ethyl or propyl radical.