Patent ID: 8687347

Claim:
A wet electrolytic capacitor comprising: a planar anode having a length of from about 20 millimeters to about 50 millimeters and a thickness, wherein the ratio of the length of the anode to the thickness of the anode is from about 7 to about 20, wherein the anode includes an anodically oxidized pellet formed from a pressed and sintered electrically conductive powder, wherein the powder is formed from a plurality of flake particles having an aspect ratio of from about 2 to about 100; a cathode that comprises a metal substrate coated with an electrochemically active material; and an aqueous electrolyte in communication with the anode and the cathode, wherein the electrolyte has a pH of from about 4.5 to about 7.0, and wherein the ratio of the voltage to which the capacitor is capable of being charged to the voltage at which the dielectric layer is formed is greater than about 1.