Capacitors with improved power cycling

An electrolytic capacitor comprising:

• an anode comprising a dielectric layer on said anode;
• a primary conductive polymer layer on said dielectric;
• a mordant layer on said primary conductive polymer layer wherein said mordant layer comprises a mordant compound of Formula A;
• wherein:
• each of R1-R6 is independently selected from H and —PO(OR7)2 wherein each R7 is independently selected from substituted or unsubstituted alkyl of 1-20 carbons, substituted or unsubstituted aryl of 6-20 carbons or an alkylaryl of 7-21 carbons;
• with the proviso that at least one of R1-R6 is —PO(OH)2;
• and
• a secondary conductive polymer layer on said mordant layer wherein R7 is substituted by at least one functional group selected from the group consisting of hydroxyl, carboxyl, amine, epoxy, silane, amide, imide, thiol, alkene, alkyne, phosphate, azide, acrylate, anhydride and an alkali metal.

A method of forming an electrolytic capacitor comprising:

• forming an anode;
• forming a dielectric on said anode;
• forming a primary conductive polymer layer on said dielectric;
• forming a mordant layer on said primary conductive polymer layer wherein said mordant layer comprises a mordant compound of Formula A;
• wherein:
• each of R1-R6 is independently selected from H and —PO(OR7)2 wherein each R7 is independently selected from H, substituted or unsubstituted alkyl of 1-20 carbons, substituted or unsubstituted aryl of 6-20 carbons or an alkylaryl of 7-21 carbons;
• with the proviso that at least one of R1-R6 is —PO(OH)2;
• forming a secondary conductive polymer layer conductive polymer layer on said mordant layer;
• and
• wherein said forming said mordant layer further comprises adding a crosslinker.

A method of forming an electrolytic capacitor comprising:

• forming an anode;
• forming a dielectric on said anode;
• forming a primary conductive polymer layer on said dielectric;
• forming a mordant layer on said primary conductive polymer layer wherein said mordant layer comprises a mordant compound of Formula A;
• wherein:
• each of R1-R6 is independently selected from H and —PO(OR7)2 wherein each R7 is independently selected from substituted or unsubstituted alkyl of 1-20 carbons, substituted or unsubstituted aryl of 6-20 carbons or an alkylaryl of 7-21 carbons;
• with the proviso that at least one of R1-R6 is —PO(OH)2;
• and
• forming a secondary conductive polymer layer conductive polymer layer on said mordant layer wherein R7 is substituted by at least one functional group selected from the group consisting of hydroxyl, carboxyl, amine, epoxy, silane, amide, imide, thiol, alkene, alkyne, phosphate, azide, acrylate, anhydride and an alkali metal.