▎ 摘　　要

NOVELTY - Energy harvesting device, comprises a laminated film (100) in which two-dimensional (2D) materials are laminated and assembled, where the laminated film includes a first region (R1) into which alkali ions are introduced, a second region (R2) into which alkali ions are introduced at a concentration lower than that of first region or into which alkali ions are not introduced, and a third region located between the first and second region to divide the first and second region, and an interlayer distance between the 2D materials is fixed by physical constraints. USE - Energy harvesting device for producing electric power. ADVANTAGE - The energy harvesting device: is flexible and portable, for which capacity is easily adjusted; has desired size characteristics, filtering characteristics, and structural stability characteristics; produces electric power with abundant inexpensive resources; and is free from an electrolyte. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. an energy harvesting module to which the energy harvesting device is connected in series; 2. a method for utilizing energy harvesting device, which involves: a. sealing laminated film of the energy harvesting using a sealing member to block contact with the atmosphere; b. removing the sealing member at the time of using the device to expose at least the laminated film of the energy harvesting device to the atmosphere; and 3. a method for manufacturing energy harvesting device, which involves: i. forming a resin strip by applying and curing a curable resin to cover both sides of laminated film by traversing the laminated film in a width direction to divide the laminated film in which two-dimensional (2D) materials are stacked and assembled into first and second region; ii. applying first liquid containing alkali ions to the first region and drying the first liquid to introduce alkali ions into the first region. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of an energy harvesting device. Laminated layer (100) 2D Material layer (110) Constraining member (200) First region (R1) Second region (R2)