US Patent 9589733 Stable solid electrolytic capacitor containing a nanocomposite

A solid electrolytic capacitor that includes an anode body, dielectric overlying the anode body, and solid electrolyte that overlies the dielectric is provided. The solid electrolyte includes a nanocomposite that contains a plurality of nanofibrils dispersed within a conductive polymer matrix. The nanofibrils have a relatively small size and high aspect ratio, which the present inventors have discovered can dramatically improve the thermal-mechanical stability and robustness of the resulting capacitor.