A solid electrolytic capacitor with more uniform electrolyte and low ESR

摘要

A solid electrolytic capacitor that contains an anode body formed from an electrically conductive powder and a dielectric coating located over and/or within the anode body is provided. The powder has a high specific charge, preferably over 70,000 CV/g. A manganese precursor solution (e.g., manganese nitrate) is readily impregnated into the pores of the anode by , in part, using a dispersant in the precursor solution. This helps minimize the likelihood that the manganese oxide precursor will form droplets upon contacting the surface of the dielectric so that the resulting manganese oxide has a "film-like" configuration and coats at least a portion of the anode in a substantially uniform manner. Preferably the dispersant contains a hydrophilic moiety and a hydrophobic moiety (see claims for preferable compositions)