Patent ID: 7554792
Filing Date: 2009-06-30
Classification: H01G

Abstract:
1. A wet electrolytic capacitor comprising: an anode, wherein the anode includes tantalum, niobium, or an electrically conductive oxide thereof; a dielectric film formed over and within the anode through anodization of the anode; a cathode containing a coating disposed over a surface of a current collector, wherein the coating comprises a plurality of electrochemically-active particles and a binder, the binder being formed from an amorphous polymer having a glass transition temperature of about 100° C. or more, wherein the binder is in the form of particles having a D a working electrolyte disposed between the cathode and the anode, wherein the working electrolyte contains an aqueous solution that includes an acid, wherein the working electrolyte comprises a nitroaromatic depolarizer in an amount of from about 10 to about 200 parts per million of the electrolyte, and wherein the electrolyte has a pH of from about 5.0 to about 8.0.