Volumetrically efficient wet electrolytic capacitor

A wet electrolytic capacitor comprising:

• a metal casing that contains a first edge portion and an opposing second edge portion extending in a longitudinal direction from an end portion to define an interior space;
• an electrochemically active cathode material disposed on at least a portion of an interior surface of the metal casing;
• an anode formed from an anodically oxidized, sintered porous body, the anode containing an upper end portion and a lower end portion, wherein a first edge portion and an opposing second edge portion of the anode extend in the longitudinal direction between the upper end portion and the lower end portion to define a length of the anode, wherein a medial longitudinal plane extends through the upper end portion of the anode in a direction parallel to the longitudinal direction, wherein the distance between the medial longitudinal plane and the respective edge portions of the anode is generally constant along the length of the anode, the anode further having a width defined between the first edge portion and the second edge portion, wherein the ratio of the width of the anode to the width of the interior space is from about 0.80 to 1.00, further wherein the anode is positioned within and occupies about 70 vol. % or more of the interior space defined by the metal casing, and
• a liquid electrolyte that is in electrical contact with the anode and the electrochemically active material.