Patent ID: 7695821

Claim:
An electrode slurry containing a polymeric composite binder and an electrode active material, wherein the polymeric composite binder comprises binder polymer and a dispersant chemically bound to a surface of the binder polymer, and the polymeric composite binder is formed by adding the dispersant after the conversion of monomer(s) into the binder polymer reaches a level of at least 50% in a polymerization reaction for forming the binder polymer, and the dispersant is at least one selected from the group consisting of: (1) a copolymer comprising 50-90 wt % of alkoxypolyalkyleneoxide (meth)acrylic acid ester represented by the following Formula 1, 5-45 wt % of (meth)acrylic acid-derived monomer represented by the following Formula 2, and 0.5-40 wt % of a reactive surfactant represented by the following Formula 3; and (2) a reactive surfactant represented by the following Formula 3: wherein R 1 is a hydrogen atom or methyl; R 2 O is alkylene oxide with 1 to 4 carbon atoms or a mixture of two or more of the alkylene oxides, and if it is the mixture, it can be added in a random or block form; R 3 is alkyl with 1 to 4 carbon atoms; and n is an integer of 1-50; wherein R 4 a hydrogen atom or methyl; M 1 is hydrogen, monovalent metal, divalent metal, ammonium or organic amine; wherein R 5 a hydrogen atom or methyl; R 6 is alkylene with 1 to 4 carbon atom, phenylene or alkyl phenylene with 1 to 4 carbon atoms; R 7 O is alkylene oxide with 1 to 4 carbon atoms or a mixture of two or more of the alkylene oxides, and if it is the mixture, it can be added in a random or block form; and M 2 is a hydrogen atom, monovalent metal atom, divalent metal atom, ammonium or organic amine group, m is an integer of 10-50, and r is 0 or 1.