Process for Producing Electrolytic Capacitors and Capacitors Made Thereby

Abstract

A process for preparing a solid electrolytic capacitor comprising application of a non-ionic polyol prior to application of a conducting polymer layer.

1 - 21 . (canceled) 
     
     
         22 . A capacitor comprising:
 an anode   a dielectric on said anode; and   a conductive polymeric cathode on said dielectric wherein said conductive polymeric cathode comprises a non-ionic polyol.   
     
     
         23 . The capacitor of  claim 22  wherein non-ionic polyol has a melting point of at least 50° C. to no more than 250° C. 
     
     
         24 . The capacitor of  claim 23  wherein non-ionic polyol has a melting point of at least 75° C. to no more than 200° C. 
     
     
         25 . The capacitor of  claim 22  wherein said non-ionic polyol comprises an alkyl of 3-20 carbons with at least two carbons each comprising at least one hydroxyl group. 
     
     
         26 . The capacitor of  claim 25  wherein at least one carbon is substituted with an alkyl group. 
     
     
         27 . The capacitor of  claim 26  wherein said alkyl group has 1 to 5 carbons. 
     
     
         28 . The capacitor of  claim 22  wherein said non-ionic polyol is selected from the group consisting of CH 2 OH(CHOH) 2 CH 2 OH, CH 2 OH(CHOH) 3 CH 2 OH, CH 2 OHC(CH 2 OH) 2 CH 2 OH, CH 2 OHC(CH 3 ) 2 CH 2 OH, CH 2 OH(CHOH) 4 CH 2 OH, CH 2 OH(CHOH) 4 CH 2 OH, CH 3 C(CH 2 OH) 3 , O(CH 2 C(C 2 H 5 )CH 2 OH) 2 ) 2 , CH 2 OH(CHOH) 4 COH, CH 2 O H(CHOH) 3 COCH 2 OH, sucrose and lactose. 
     
     
         29 . The capacitor of  claim 22  further comprising drying said conductive polymer layer. 
     
     
         30 . The capacitor of  claim 22  wherein said anode comprises a valve metal. 
     
     
         31 . The capacitor of  claim 30  wherein said anode is selected from a group consisting of a valve metal and a conductive oxide of a valve metal. 
     
     
         32 . The capacitor of  claim 30  wherein said anode comprises a material selected from the group consisting of tantalum, aluminum, niobium and niobium oxide. 
     
     
         33 . The capacitor of  claim 22  wherein said conductive polymer is selected from the group consisting of polyaniline, polythiophene and polypyrole and their derivatives. 
     
     
         34 . The capacitor of  claim 33  wherein said conductive polymer is poly-3,4-ethylenedioxythiophene. 
     
     
         35 . The capacitor of  claim 22  further comprising forming a layer of nanoparticles on said conductive polymer layer. 
     
     
         36 . The capacitor of  claim 35  wherein said nanoparticles have an average particle size of no more than 100 nm. 
     
     
         37 . The capacitor of  claim 36  wherein said nanoparticles have an average particle size of no more than 50 nm. 
     
     
         38 . The capacitor of  claim 35  wherein said nanoparticles are selected from the group consisting of aluminum oxide, cerium oxide silicon oxide and zinc oxide.