Electrochemical double layer capacitor

Claim 1

A low inductance electrolytic double layer capacitor comprising at least one cell comprising at least first and second thin, disc-form electrode structures, spacing means for maintaining said electrode structures in spaced relation to each other, each of said electrode structures comprising an electrode portion of the same activated material presenting on one side a porous generally planar space contiguously to the space between said electrode structures, each said structure further comprising a planar electrolyte impervious conductor portion substantially coextensive with and in electronic communication with said activated portion at the other side thereof, said activated portions and said space being saturated with a dry ionically high conductive solid electrolyte, said electrode structures and said means for maintaining the same in spaced relation being inert to said electrolyte, said electrolyte being a solid ionic conductor consisting of silver iodide containing an alkaline metal, said electrolyte being chosen from the group consisting of RbAg4I5 and KAg4I5, and an axially short outer package comprising conductive, discshaped end terminals parallel to and in electrical communication with said conductor portions and substantially coextensive therewith, said cell being connected in series between said terminals by said electrolyte impervious portions, providing non-film forming isolation of the electrolyte to the cell and electrical communication to said terminals, said impervious conductor portions comprising portions of said electrode structures which are selectively sealed so as to be devoid of said electrolyte.