A method for preparing an aqueous cathode slurry composition, specifically including: (a) performing a first mixing step by mixing a binder and an aqueous solvent; and (b) mixing lithium iron phosphate (LiFePO4) as the cathode active material and a conductive agent into the mixture from step (a), followed by performing a second mixing step using at least one process selected from the group consisting of high rotation energy dispersion mixing, compression pressure mixing, and rotation shear mixing.

A method for preparing an aqueous cathode slurry composition, specifically including: (a) performing a first mixing step by mixing a binder and an aqueous solvent; and (b) mixing lithium iron phosphate (LiFePO4) as the cathode active material and a conductive agent into the mixture from step (a), followed by performing a second mixing step using at least one process selected from the group consisting of high rotation energy dispersion mixing, compression pressure mixing, and rotation shear mixing.

Disclosed are methods of manufacturing negative electrode slurry for all-solid-state batteries, negative electrodes manufactured by the methods, and all-solid-state batteries including the negative electrodes. The method of manufacturing a negative electrode slurry includes preparing a first mixture by mixing a negative electrode material with a binder solution that includes a solvent and a first binder, producing a dispersion by performing an ultrasonic dispersion treatment on the first mixture, and preparing a second mixture by adding a second binder to the dispersion.

Disclosed are methods of manufacturing negative electrode slurry for all-solid-state batteries, negative electrodes manufactured by the methods, and all-solid-state batteries including the negative electrodes. The method of manufacturing a negative electrode slurry includes preparing a first mixture by mixing a negative electrode material with a binder solution that includes a solvent and a first binder, producing a dispersion by performing an ultrasonic dispersion treatment on the first mixture, and preparing a second mixture by adding a second binder to the dispersion.