Capacitor and method for producing a capacitor

An electrode for an electrolytic capacitor comprising:

• a substrate comprising at least one of titanium and glassy carbon;
• and
• a carbonaceous layer adjacent the substrate;
• wherein the carbonaceous layer includes an activated carbon region and a capacitance-enhancing material provided adjacent the activated carbon region.

An electrode for a capacitor comprising:

• a substrate comprising at least one of glassy carbon and a metal;
• an activated carbon material adjacent the substrate;
• and
• carbon nanotubes provided adjacent the activated carbon material;
• whereby the activated carbon material and the carbon nanotubes provide enhanced capacitance for the electrode.

An electrode for a capacitor comprising:

• a substrate comprising at least one of glassy carbon and a metal;
• an activated carbon material adjacent the substrate;
• and
• an electronically conductive metal oxide provided adjacent the activated carbon material;
• whereby the activated carbon material and the electronically conductive metal oxide provide enhanced capacitance for the electrode.