Device for producing negative electrode and method of producing negative electrode

A device for producing a negative electrode, comprising:

• a pre-lithiation bath comprising a pre-lithiation solution, which is sequentially divided into an impregnation section, a pre-lithiation section, and an aging section;
• a negative electrode roll present outside the pre-lithiation solution, wherein the negative electrode roll is configured to allow a negative electrode structure to be wound and unwound;
• and
• one or more pre-lithiation rolls which are present inside the pre-lithiation solution, wherein the one or more pre-lithiation rolls allow the negative electrode structure unwound from the negative electrode roll to move in the pre-lithiation bath,
• wherein the pre-lithiation roll comprises an inner ring, an outer ring which is formed on the inner ring and is rotatable, a rolling element present between the inner ring and the outer ring, the rolling element directly contacting the inner ring and the outer ring, and a cage between the inner ring and the outer ring and accommodating the rolling element,
• wherein the outer ring in the pre-lithiation roll comprises a non-conductor, and
• wherein the outer ring forms an exterior surface of the pre-lithiation roll, the exterior surface configured to contact the negative electrode structure.