| abstract |
The present invention is capable of uniformly dispersing a positive electrode active material, a thickener, a conductive material, an acidic functional group-containing polymer, and the like in a slurry composition, and thereby used as a positive electrode material. An object of the present invention is to provide a method for producing a slurry composition for a positive electrode of a lithium ion secondary battery, which can ensure the adhesion between the positive electrode active material layer and the current collector and the electrical characteristics of the lithium ion secondary battery. And A method for producing a slurry composition for a positive electrode of a lithium ion secondary battery according to the present invention includes a step (1) of dry-mixing a positive electrode active material, a thickener, and a conductive material to obtain a dry mixture; Step (2) of adding an aqueous dispersion of an acidic functional group-containing polymer having a pH of 2.5 to 7 to the dry mixture to obtain a composition having a solid content concentration of 75 to 90% by mass; and kneading the composition. A step (3) for obtaining a kneaded product, and a step (4) for preparing a slurry composition having a solid content concentration of 50 to 70 mass% by adding an aqueous dispersion of a particulate binder to the kneaded product. Including. [Selection figure] None |