Abstract
Using the techniques of image analysis, profilometry, gas permeability, mercury porosimetry, and gas adsorption, the morphological properties of porous electrode film (1 to 300 μm) materials are discussed. The materials include platinum paste which is utilized as electrodes for high-temperature oxygen-ion-conducting ZrO2 electrolytes and for low-temperature solid-state protonic electrolytes. Also considered are plasma-sprayed nickel layers and silver membranes. It is shown that each of the five methods can be used to make quantitative evaluations of film electrodes. The electrode morphological parameters measured include particle dimeter, pore diameter, porosity, three-phase line, thickness, surface texture, gas-flow/pressure, pore area, and surface area. A discussion of these properties as they relate to activation and concentration polarization of electrochemical cells is also presented.
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Canaday, J.D., Wheat, T.A., Haley, M.P. et al. A morphological investigation of electrodes for solid electrolytes. J Mater Sci 24, 3621–3634 (1989). https://doi.org/10.1007/BF02385749
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DOI: https://doi.org/10.1007/BF02385749