Particulate active material power storage device positive electrode power storage device and production method for particulate active material

Abstract

A particulate active material for a power storage device positive electrode having a higher energy density is provided, which includes particles of an electrically conductive polymer and a conductive agent, wherein the electrically conductive polymer particles each have a surface coated with the conductive agent.

1 . A particulate active material for a power storage device positive electrode, the particulate active material consisting of:
 particles of an electrically conductive polymer; and   a conductive agent;   wherein the electrically conductive polymer is a dedoped polymer, and   wherein the particles of the electrically conductive polymer each have a surface coated with the conductive agent.   
     
     
         2 . The particulate active material according to  claim 1 , wherein the conductive agent is present in a proportion of 1 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer. 
     
     
         3 . The particulate active material according to  claim 1 , wherein the electrically conductive polymer is a polyaniline or a polyaniline derivative. 
     
     
         4 . The particulate active material according to  claim 1 , wherein the conductive agent is present in a proportion of 13 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer. 
     
     
         5 . A power storage device positive electrode comprising the particulate active material according to  claim 1 . 
     
     
         6 . The power storage device positive electrode according to  claim 5 , wherein the conductive agent is present in a proportion of 1 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer in the active material. 
     
     
         7 . The power storage device positive electrode according to  claim 5 , wherein the electrically conductive polymer is a polyaniline or a polyaniline derivative. 
     
     
         8 . The power storage device positive electrode according to  claim 5 , wherein the conductive agent is present in a proportion of 13 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer. 
     
     
         9 . A power storage device comprising:
 an electrolyte layer; and   a positive electrode and a negative electrode provided in opposed relation with the electrolyte layer interposed therebetween;   wherein the positive electrode comprises the particulate active material according to  claim 1 .   
     
     
         10 . The power storage device according to  claim 9 , wherein the conductive agent is present in a proportion of 1 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer in the active material. 
     
     
         11 . The power storage device according to  claim 9 , wherein the electrically conductive polymer is a polyaniline or a polyaniline derivative. 
     
     
         12 . The power storage device according to  claim 9 , wherein the conductive agent is present in a proportion of 13 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer. 
     
     
         13 . A method for producing a particulate active material for a power storage device positive electrode, the particulate active material consisting of:
 particles of an electrically conductive polymer; and   a conductive agent;   wherein the electrically conductive polymer is a dedoped polymer, and   wherein the particles of the electrically conductive polymer each have a surface coated with the conductive agent,   the method comprising the step of shearing the electrically conductive polymer particles and the conductive agent by means of a composite particle producing apparatus to coat surfaces of the electrically conductive polymer particles with the conductive agent.   
     
     
         14 . The method according to  claim 13 , wherein the conductive agent is present in a proportion of 1 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer in the active material. 
     
     
         15 . The method according to  claim 13 , wherein the electrically conductive polymer is a polyaniline or a polyaniline derivative. 
     
     
         16 . The method according to  claim 13 , wherein the conductive agent is present in a proportion of 13 to 30 parts by weight based on 100 parts by weight of the electrically conductive polymer.