Porous substrate, porous electrode, carbon fiber paper, method for producing carbon fiber paper, method for producing porous substrate

摘要

Suitable for porous substrates and electrodes, which have gas permeability suitable for gas diffusion layers for fuel cell vehicles and mechanical strength that can withstand continuous processing by roll-to-roll, and electrodes for redox flow batteries There has been a demand for a porous electrode excellent in diffusibility of an electrolytic solution. A porous material in which carbon fibers (A) having an average fiber diameter of 10 to 20 μm, an average fiber length of 2 to 30 mm, a tensile elastic modulus of 200 to 600 GPa, and a tensile strength of 3000 to 7000 MPa are bound with a carbon binder (D). A quality substrate is provided.