Method for producing electrode and method for producing battery

Abstract

According to one embodiment, a method for producing an electrode, includes applying tensile force. The electrode includes a strip current collector, a current collector exposed portion, and an active material-containing layer. In the applying tensile force, arranging a strip electrode plate on a roller including a step portion and a recessed portion such that the current collector exposed portion is positioned on the step portion and the active material-containing layer is positioned on the recessed portion, and then applying tensile force to the strip electrode plate in a longitudinal direction of the strip electrode plate.

1 - 9 : (canceled) 
     
     
         10 . A method for producing an electrode comprising a strip current collector, a current collector exposed portion which is formed on at least one long side of the strip current collector and in which no active material-containing layer exists on each surface thereof, and an active material-containing layer formed on at least a part of the strip current collector excluding the current collector exposed portion, the method comprising:
 arranging a strip electrode plate on a roller comprising a step portion projected from a circumferential surface and a recessed portion adjacent to the step portion such that the current collector exposed portion is positioned on the step portion and the active material-containing layer is positioned on the recessed portion; and   applying tensile force to the strip current collector in a longitudinal direction of the strip current collector.   
     
     
         11 . The method for producing an electrode according to  claim 10 , further comprising a compression-molding of the active material-containing layer before the applying tensile force. 
     
     
         12 . The method for producing an electrode according to  claim 11 , further comprising a drying after the applying tensile force and applying tensile force again after the drying. 
     
     
         13 . The method for producing an electrode according to  claim 11 ,
 wherein the applying tensile force and the compression-molding the active material-containing layer are carried out alternately.   
     
     
         14 . The method for producing an electrode according to  claim 10 ,
 wherein the active material-containing layer is formed continuously or intermittently in the longitudinal direction of the strip current collector, on the at least the part of the strip current collector excluding the current collector exposed portion.   
     
     
         15 . The method for producing an electrode according to  claim 10 ,
 wherein the strip current collector is made of an aluminum foil, an aluminum alloy foil, or a copper foil.   
     
     
         16 . A method for producing a battery comprising a positive electrode, a negative electrode, and a nonaqueous electrolyte,
 wherein at least one of the positive and negative electrodes is produced by the method as claimed in  claim 10 .