Aqueous Slurry For Battery Electrodes

Abstract

A slurry or paste for the manufacture of electrodes for secondary batteries such as lithium ion containing electrochemical cells. The slurry comprises a water based binder with CMC, SBR and PVDF as binder materials.

1 . (canceled) 
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . (canceled) 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . (canceled) 
     
     
         8 . (canceled) 
     
     
         9 . (canceled) 
     
     
         10 . A method for the manufacture of an electrode for use in an electrochemical cell, the method comprising:
 preparing a slurry comprising a combination of at least three of polyacylic acid (PAA), carboxymethyl cellulose (CMC), styrene-butadiene rubber (SBR) and polyvinylidene fluoride (PVDF) as binder in an aqueous solution,   coating or laminating the slurry on a current collector.   
     
     
         11 . The method of  claim 10 , wherein preparing the slurry comprises dispersing latex in the aqueous solution for stabilizing the aqueous solution. 
     
     
         12 . The method of  claim 10 , further comprising adding a non-aqueous electrolyte. 
     
     
         13 . The method of  claim 10 , wherein the concentration of each one of the at least three of the polyacrylic acid (PAA), the carboxymethyl cellulose, the styrene-butadiene rubber and the polyvinylidene fluoride is about 0.5% to about 10% by weight. 
     
     
         14 . The method of  claim 10 , further comprising drying the slurry.