Method for manufacturing negative electrode for lithium secondary battery

A method for manufacturing an all-solid lithium secondary battery, the method comprising:

• forming a negative electrode active material layer on opposite sides of a negative electrode current collector to form a structure, the negative electrode active material layer including a negative electrode active material and a first solid electrolyte;
• placing the structure between upper and lower plates of a press and compressing the structure to manufacture a negative electrode;
• applying a second solid electrolyte on at least one surface of the manufactured negative electrode to form a solid electrolyte film;
• laminating a positive electrode including a third solid electrolyte on an upper portion of the solid electrolyte film to form a laminate body;
• and
• casing the laminate body, wherein
• a lithium alloy layer is formed on a portion of each of the upper and lower plates of the press which are in contact with respective negative electrode active material layers of the structure, and
• a negative electrode tap protruding from one side of the negative electrode current collector and having no negative electrode active material is electrically connected to the press through a connection part respectively disposed on the upper and lower plates of the press, whereby pre-lithiation is performed at time of compression.

A method for manufacturing a lithium secondary battery, the method comprising:

• forming a negative electrode active material layer on opposite sides of a negative electrode current collector to form a structure;
• placing the structure between upper and lower plates of a press and compressing the structure to manufacture a negative electrode;
• laminating a separator on at least one surface of the manufactured negative electrode;
• laminating a positive electrode on an upper portion of the separator to form a laminate body;
• and
• receiving the laminate body in a battery container and injecting a liquid electrolyte into the battery container, wherein
• a lithium alloy layer is formed on a portion of each of the upper and lower plates of the press which are in contact with respective negative electrode active material layers of the structure, and
• a negative electrode tap protruding from one side of the negative electrode current collector and having no negative electrode active material is electrically connected to the press through a connection part respectively disposed on the upper and lower plates of the press, whereby pre-lithiation is performed at time of compression.