Electrode for secondary battery and manufacturing process for the same

Abstract

It is an assignment to be solved to provide an electrode for secondary battery, electrode in which the active material is suppressed from coming off or falling down from the electricity collector, and that has excellent cyclic performance. It is characterized in that, in an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector, said binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I): wherein “R 1 ” is an alkyl group whose number of carbon atoms is from 1 to 8; “R 2 ” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.

1 . In an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector,
 the electrode for secondary battery being characterized in that said binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I):   
       
         
           
           
               
               
           
         
         wherein “R 1 ” is an alkyl group whose number of carbon atoms is from 1 to 8; 
         “R 2 ” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and 
         “q” is an integer of from 1 to 100. 
       
     
     
         2 . The electrode for secondary battery as set forth in  claim 1 , wherein said alkoxysilyl group-containing resin is an alkoxy group-containing silane-modified bisphenol type-A epoxy resin, an alkoxy group-containing silane-modified novolac-type epoxy resin, an alkoxy group-containing silane-modified acrylic resin, an alkoxy group-containing silane-modified phenolic resin, an alkoxy group-containing silane-modified polyamic acid resin, an alkoxy group-containing silane-modified soluble polyimide resin, an alkoxy group-containing silane-modified polyurethane resin, or an alkoxy group-containing silane-modified polyamide-imide resin. 
     
     
         3 . In an electrode for secondary battery, electrode in which an active material is bound on a surface of electricity collector by way of a binder, the electrode for secondary battery being characterized in that said binder is an alkoxysilyl group-containing resinous cured substance that has a structure being specified by formula (II):
   R 1   m SiO (4-m)/2      wherein “m”=an integer of from 0 to 2; and   “R 1 ” designates an alkyl group or aryl group whose number of carbon atoms is 8 or less.   
     
     
         4 . The electrode for secondary battery as set forth in  claim 3 , wherein said alkoxysilyl group-containing resinous cured substance is an alkoxy group-containing silane-modified bisphenol type-A epoxy resinous cured substance, an alkoxy group-containing silane-modified novolac-type epoxy resinous cured substance, an alkoxy group-containing silane-modified acrylic resinous cured substance, an alkoxy group-containing silane-modified phenolic resinous cured substance, an alkoxy group-containing silane-modified polyimide resinous cured substance, an alkoxy group-containing silane-modified soluble polyimide resinous cured substance, an alkoxy group-containing silane-modified polyurethane resinous cured substance, or an alkoxy group-containing silane-modified polyamide-imide resinous cured substance. 
     
     
         5 . The electrode for secondary battery as set forth in  claim 1 , wherein said electrode for secondary battery is an electrode for lithium-ion secondary battery. 
     
     
         6 . The electrode for secondary battery as set forth in  claim 5 , wherein:
 said electrode for secondary battery is an electrode for secondary battery, electrode which is used for negative electrode;   said electricity collector comprises copper or aluminum; and   said active material includes metal or metallic oxide that is capable of alloying with lithium.   
     
     
         7 . The electrode for secondary battery as set forth in  claim 6 , wherein said metal or metallic oxide that is capable of alloying with lithium includes Si and/or Sn. 
     
     
         8 . The electrode for secondary battery as set forth in  claim 5 , wherein:
 said electrode for secondary battery is an electrode for secondary battery, electrode which is used for negative electrode; and   said active material includes carbon.   
     
     
         9 . A manufacturing process for electrode for secondary battery, the manufacturing process comprising:
 an application step of applying a binder resin and an active material onto a surface of electricity collector; and   a curing step of curing said binder resin and then binding said active material on said electricity-collector surface,   the manufacturing process for electrode for secondary battery being characterized in that   said binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I):   
       
         
           
           
               
               
           
         
         wherein “R 1 ” is an alkyl group whose number of carbon atoms is from 1 to 8; 
         “R 2 ” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and 
         “q” is an integer of from 1 to 100. 
       
     
     
         10 . The electrode for secondary battery as set forth in  claim 3 , wherein said electrode for secondary battery is an electrode for lithium-ion secondary battery. 
     
     
         11 . The electrode for secondary battery as set forth in  claim 10 , wherein:
 said electrode for secondary battery is an electrode for secondary battery, electrode which is used for negative electrode;   said electricity collector comprises copper or aluminum; and   said active material includes metal or metallic oxide that is capable of alloying with lithium.   
     
     
         12 . The electrode for secondary battery as set forth in  claim 11 , wherein said metal or metallic oxide that is capable of alloying with lithium includes Si and/or Sn. 
     
     
         13 . The electrode for secondary battery as set forth in  claim 10 , wherein:
 said electrode for secondary battery is an electrode for secondary battery, electrode which is used for negative electrode; and   said active material includes carbon.