| abstract |
A main object of the present invention is to provide a gas diffusion layer that can be easily stored. A long gas diffusion layer 1 including a first conductive porous layer 1a, the gas diffusion layer 1 being wound in a roll shape, and the first conductive porous layer 1a is made of conductive carbon. A gas diffusion layer 1 comprising a material and a polymer, wherein the first conductive porous layer 1a has a tensile fracture stress of 3.0 MPa to 10.0 MPa. [Selection] Figure 1 |