A layering device 100 layers a plurality of sheet materials W on a layering stage 30, and comprises: a plurality of layering heads 102 each having a retaining surface 110 with a curved surface shape for retaining a sheet material W; a drum part 104 in whic...

The method comprises heating a portion of the layer by providing a current flow within the layer, hot-pressing a gas diffusion layer (1) or a gas diffusion electrode layer (3) deposited on a carrier such as polymer electrolyte membrane (2), and introducing...