Fabrication Method of Negative Electrode for Secondary Battery and Secondary Battery Including Negative Electrode

Abstract

The present invention provides a fabrication method of a negative electrode for a secondary battery, including: (a) heating a slurry composition for a negative electrode containing a negative electrode active material, a binder, and a solvent to a temperature lower than a boiling point (Tb) of the solvent; (b) applying the heated slurry composition for a negative electrode onto a current collector; and (c) cooling the applied slurry composition for a negative electrode.

What is claimed is: 
     
         1 . A negative electrode for a secondary battery comprising: a current collector; and
 a negative electrode active material layer formed on the current collector and containing a negative electrode active material, a conductive material, and a binder,   wherein in the negative electrode, a difference between a maximum loading value and a minimum loading value of the negative electrode active material layer at five or more positions having regular intervals in a length direction is 10% or less of a total loading average value.   
     
     
         2 . The negative electrode for a secondary battery of  claim 1 ,
 wherein the negative electrode active material layer comprises a first region adjacent to the current collector, a second region positioned at a central portion of the negative electrode active material layer, and a third region adjacent to a surface of the negative electrode active material layer, the respective regions having the same thickness; and,   wherein a concentration deviation of contents of the binder or the conductive materials contained in the respective regions may be 0.3 wt % or less.   
     
     
         3 . The negative electrode for a secondary battery of  claim 1 ,
 wherein an adhesive force of the negative electrode active material layer to the current collector is 0.20 N/cm or more.   
     
     
         4 . A secondary battery comprising:
 a negative electrode of  claim 1 ;   a positive electrode;   a separator positioned between the negative electrode and the positive electrode; and   an electrolyte.