Secondary battery electrode, and method for producing same
摘要
說(shuō)明書
When the active material bulk which is the molded body is intended to be produced, the active material bulk production step may be performed by unidirectional, bidirectional, or isotropic compression molding of the raw material. Specifically, the production step of the active material bulk which is the molded body may include mixing the raw material; and press (compression)-molding the mixed raw material.
Mixing of the raw material may be dry or wet mixing. The dry mixing may be performed by mixing the particulate electrode active material with an additive such as a carbon precursor without using a solvent (or a dispersion medium). In the case of wet mixing, the solvent or the dispersion medium is used, but mixing may be performed in the state in which the solid content is very high (as an example, a solid content of 60 wt % or more, as a specific example, a solid content of 70 wt % or more), unlike the conventional active material slurry production process, thereby significantly decreasing the usage of the aqueous solvent or the organic solvent which is used as the solvent or dispersion medium. When the wet mixing is performed, a drying step of removing the solvent (or dispersion medium) by volatilization before the molding or after the molding, may be further performed.
