Pouch type all-solid-state lithium secondary battery and method for producing the same

A manufacturing method of an all-solid-state lithium secondary battery including a solid polymer electrolyte, comprising:

• preparing an all-solid-state lithium secondary battery by interposing a polymer electrolyte between a cathode composite electrode and an anode composite electrode;
• hardening the polymer electrolyte to form a solid polymer electrolyte by simultaneously applying a pressure of 500 Pa to 2,000 Pa and heat of 80° C. to 100° C. for 30 to 120 minutes to the all-solid-state lithium secondary battery;
• activating the all-solid-state lithium secondary battery by applying a current of 0.05 C to 0.2 C;
• and
• removing a gas generated in the activated all-solid-state lithium secondary battery,
• wherein the activating and the removing a gas are repeated 2 to 5 times,
• wherein the cathode composite electrode and the anode composite electrode are formed to include polyethylene glycol dimethyl ether as an ion conductive material, a lithium salt, a binder, and a conductive agent,
• wherein the polymer electrolyte comprises polyethylene glycol dimethyl ether, bisphenol A, and an initiator,
• wherein the polymer electrolyte comprises polyethylene glycol dimethyl ether, and
• wherein the ion conductive material and the binder in each of the cathode composite electrode and the anode composite electrode are mixed in a ratio of 2:1 to 1:2.