| 摘要 |
PURPOSE: To provide a nonaqueous-secondary-battery negative electrode mix which is high in viscosity and contains almost no aggregates by kneading and dispersing together a negative active material, a conducting agent, and a dispersion in which a binder is dispersed in a thickener solution. CONSTITUTION: Water and carboxymethyl cellulose CMC are put in a predispersion tank 6 and then the dispersing agitating blade 8 of an agitator 7 is rotated to dissolve the CMC in the water. Polyvinylidene fluoride is put in this solution, and the dispersing agitating blade 8 of the agitator 7 is rotated to prepare a dispersion of polyvinylidene fluoride. The dispersion is transferred to a dispersion tank 4, SiSnO3 , acetylene black and graphite are added, and the dispersing agitating blade 3 and the anchor blade 2 of an agitator 1 are rotated to obtain a negative electrode mix. Thus aggregates such as binder aggregate and carbon aggregate in the negative electrode mix can be markedly reduced without the viscosity of the negative electrode mix being lowered. |
