Composite Electrode for a Lithium or Lithium-Ion Battery and Production Method Therefor

A method for producing a composite electrode for a lithium or lithium-ion battery, comprising:

• providing a foil-like or planar current collector having a main face;
• forming a first electrode layer on the main face of the current collector, wherein the first electrode layer comprises a first active material and forms a first adherence between the current collector and the first electrode layer along the main face;
• forming a second electrode layer on the first electrode layer, wherein the first and second electrode layer are mutually touching along a contact face which lies opposite the main face of the current collector, and the second electrode layer comprises a second active material and has an adherent connection to the first electrode layer along the contact face;
• and
• compressing the first and second electrode layer using a compression device, wherein, during the compression, a pressure element of the compression device exerts a pressure on at least a portion of the face of the second electrode layer that lies opposite the contact face, and a second adherence forms between the pressure element and the portion of the face of the second electrode layer on which the pressure is exerted,
• wherein a ratio between the first adherence and the second adherence which arises as a result of the compression is greater than one.

A composite electrode for a lithium or lithium-ion battery, comprising:

• a foil-like or planar current collector having a main face and a surface material forming the main face, wherein the main face has a roughness;
• a first electrode layer on the main face of the current collector, wherein the first electrode layer comprises a first active material and a first binder, wherein the first binder has a first adherence with respect to the main face of the current collector so as to form, via the first adherence, an adherence of the first electrode layer to the current collector;
• a second electrode layer on a face of the first electrode layer that lies opposite the main face of the current collector, wherein the second electrode layer comprises a second active material and a second binder, wherein the second binder has a second adherence with respect to a reference surface which has the surface material and the roughness of the main face of the current collector, and
• an adherent connection between the first electrode layer and the second electrode layer formed by the first binder and/or the second binder along the contact face thereof,
• wherein a ratio between the first adherence of the first binder and the second adherence of the second binder is greater than one.