An electrochemical device for three-dimensional (3D) diffusivity measurement in fuel cells

An electrochemical cell is proposed for 3D diffusivity measurement in fuel cells. The proposed device allows for simultaneous measurement of anode/cathode diffusivity in three electrode directions. The 3D diffusivity measurement facilitates the accurate evaluation of 3D concentration polarization, 3D limiting current density (LCD), 3D electrode porosity as well as 3D electrode tortuosity. Through diffusivity measurement in three electrode directions, the optimum electrode operation direction can be realized.