The characterization of porous electrodes by impedance measurements

摘要: Abstract Impedances of a gold-powder and Raney-gold electrode were measured over wide frequency range, found to be very similar those cylindrical pore finite depth. The simulation calculation for sphere-packed impedance was performed. It observed that even though each sphere-layer shows the related an occluded pore-shape, overall is electrode. When penetration depth approaches depth, shape wall has little influence on impedance. Thus, measurement techniques can applied porous electrodes more intricate pore-texture, evaluate radius, number its equivalent These values determined are in good agreement with by other methods. case realistic fuel cell such as Raney-nickel metal-electrolyte-gas system, also tentatively examined.