Method for manufacturing lithium secondary battery, method for manufacturing stacked battery, and method for manufacturing composite body

A method for manufacturing a lithium secondary battery comprising a cell, said method comprising:

• (a) forming the whole of a first conductive material layer on a first bonding surface of a first outer film having flexibility and barrier properties to prepare a first composite body,
• wherein
• said first conductive material layer is integrated with said first outer film,
• said first conductive material layer comprises a first-pole current collector of said cell and a first-pole electrode terminal that is electrically connected to said first-pole current collector,
• said first-pole current collector is located within a first application region, and
• at least a part of said first-pole electrode terminal is located outside said first application region;
• (b) adding a first-pole active material precursor layer to said first composite body by printing a first-pole active material substance with a plane position thereof being aligned with that of said first-pole current collector, wherein said first-pole active material substance is a mixture of a pre-crosslinked precursor of a lithium-ion-conducting polymer electrolyte and a first-pole active material;
• (c) after (b), adding an electrolyte precursor layer to said first composite body by printing an electrolyte substance with a plane position thereof being aligned with that of said first-pole current collector, wherein said electrolyte substance comprises a pre-crosslinked precursor of a lithium-ion-conducting polymer electrolyte;
• (d) simultaneously or separately subjecting said first-pole active material precursor layer and said electrolyte precursor layer to a crosslinking process, to thereby transform said first-pole active material precursor layer and said electrolyte precursor layer into a first-pole active material layer and an electrolyte layer, respectively;
• (e) separately from (a) to (d), forming the whole of a second conductive material layer on a second bonding surface of a second outer film having flexibility and barrier properties to prepare a second composite body,
• wherein
• said second conductive material layer is integrated with said second outer film,
• said second conductive material layer comprises a second-pole current collector of said cell and a second-pole electrode terminal that is electrically connected to said second-pole current collector,
• said second-pole current collector is located within a second application region, and
• at least a part of said second-pole electrode terminal is located outside said second application region;
• (f) adding a second-pole active material precursor layer to said second composite body by printing a second-pole active material substance with a plane position thereof being aligned with that of said second-pole current collector, wherein said second-pole active material substance is a mixture of a pre-crosslinked precursor of a lithium-ion-conducting polymer electrolyte and a second-pole active material;
• (g) simultaneously with or separately from the crosslinking process on said first-pole active material precursor layer and said electrolyte precursor layer, subjecting said second-pole active material precursor layer to a crosslinking process, to thereby transform said second-pole active material precursor layer into a second-pole active material layer;
• (h) after (a) to (g), placing said first bonding surface and said second bonding surface face to face with each other, and applying said first application region and said second application region to each other while aligning plane positions of said first-pole current collector, said first-pole active material layer, said electrolyte layer, said second-pole active material layer, and said second-pole current collector;
• and
• (i) after (h), bonding said first outer film and said second outer film to each other, to seal said cell,
• wherein, in said cell,
• said first-pole electrode terminal is formed on said first bonding surface of said first outer film,
• said first-pole electrode terminal is exposed outside of said lithium secondary battery and does not overlap with said second outer film,
• said second-pole electrode terminal is formed on said second bonding surface of said second outer film, and
• said second-pole electrode terminal is exposed outside of said lithium secondary battery and does not overlap with said first outer film.