All-in-one electrode stack unit, manufacturing method thereof, and lithium secondary battery including the same

An all-in-one electrode stack unit comprising:

• a first electrode, a second electrode, and a separation layer interposed between the first electrode and the second electrode,
• wherein the separation layer is a photocured pressure sensitive adhesive (PSA) coating layer integrally formed on the first electrode,
• wherein the separation layer has a tensile strength of 30 to 50 MPa, and an adhesive force to the second electrode of 70 gf/20 mm to 90 gf/20 mm, and
• wherein the first electrode, the separation layer, and the second electrode are laminated,
• wherein the photocured PSA coating layer is a polymer coating layer containing ceramic particles,
• wherein the polymer is an acrylate-based or epoxy-based monomer, an acrylate-based or epoxy-based oligomer, or a polymer of the monomer and the oligomer,
• wherein the photocured PSA coating layer is obtained by curing a PSA solvent-free ink, and
• wherein the PSA solvent-free ink contains 10 to 30% by weight of ceramic particles, 45 to 65% by weight of a monofunctional monomer, 10 to 15% by weight of a polyfunctional monomer, 5 to 10% by weight of an oligomer, and 0.1 to 0.8% by weight of an initiator.