Electrode, power storage device, electronic device, and manufacturing method of electrode

Abstract

Provided is an electrode including a current collector and an active material layer. The active material layer includes an active material, a film including silicone, a conductive additive, and a binder. The active material is in the form of a particle. The film including silicone covers at least part of the active material.

What is claimed is: 
     
         1 . A method for manufacturing an electrode, comprising:
 forming a mixed liquid of an active material, silicone, and a first solvent;   forming an active material with a film thereon by spraying the mixed liquid from a nozzle and evaporating the first solvent;   forming a paste including the active material with the film thereon, a conductive additive, a binder, and a second solvent; and   forming an active material layer by applying the paste to a current collector and evaporating the second solvent.   
     
     
         2 . The method for manufacturing an electrode, according to  claim 1 ,
 wherein the active material includes at least one of graphite, silicon, and silicon monoxide.   
     
     
         3 . The method for manufacturing an electrode, according to  claim 1 ,
 wherein the silicone includes a hydrophobic functional group.   
     
     
         4 . The method for manufacturing an electrode, according to  claim 3 ,
 wherein the hydrophobic functional group includes at least one of a phenyl group, an alkyl group, an alkoxy group, a carbonyl group, and an ester group.   
     
     
         5 . The method for manufacturing an electrode, according to  claim 1 ,
 wherein the silicone includes a hydrophilic functional group.   
     
     
         6 . A method for manufacturing an electrode, comprising:
 forming a mixed liquid of an active material, silicone, a conductive additive, and a first solvent;   forming a mixture with a film thereon by spraying the mixed liquid and evaporating the first solvent with a spray dryer;   forming a paste including the mixture with the film thereon, a binder, and a second solvent; and   forming an active material layer by applying the paste to a current collector and evaporating the second solvent.   
     
     
         7 . The method for manufacturing an electrode, according to  claim 6 ,
 wherein the active material includes at least one of graphite, silicon, and silicon monoxide.   
     
     
         8 . The method for manufacturing an electrode, according to  claim 6 ,
 wherein the silicone includes a hydrophobic functional group.   
     
     
         9 . The method for manufacturing an electrode, according to  claim 8 ,
 wherein the hydrophobic functional group includes at least one of a phenyl group, an alkyl group, an alkoxy group, a carbonyl group, and an ester group.   
     
     
         10 . The method for manufacturing an electrode, according to  claim 6 ,
 wherein the silicone includes a hydrophilic functional group.