Secondary battery electrode, and method for producing same
摘要
說明書
In a specific example of the present invention, the active material bulk which is a molded body or a sintered body may have an apparent porosity of 10 to 45%, specifically 15 to 40%. In addition, the active material film may have an apparent porosity of 10 to 45%, specifically 15 to 40%. Since the active material film is produced by slicing the active material bulk, the active material film may have substantially the same porosity as the active material bulk.
The composition of the active material bulk (and active material film) may vary depending on the kind and content of additive included in the raw material. When the raw material contains a conductive material, that is, the active material film contains a conductive material, the conductive material film may be contained at 1 to 30 parts by weight, as a specific example, 1 to 20 parts by weight, based 100 parts by weight of the electrode active material, but is not necessarily limited thereto.
When the active material film contains pyrocarbon by the organic binder or the carbon precursor of the raw material, the pyrocarbon may be contained at 0.5 to 30 parts by weight, as a specific example, 1 to 25 parts by weight, based on 100 parts by weight of the electrode active material, but is not necessarily limited thereto.
After the active material bulk is produced as a molded body or a sintered body, a processing step of cutting and/or grinding the active material bulk for processing the active material bulk to have a desired dimension such as chamfer or parallelepiped may be further performed, of course.
