Effect of porosity on the electrical resistivity of carbon materials

A model describing the effect of true density and porosity on the electrical resistivity of carbon materials is developed based on ideal fluid mechanics. The modeling results are in good agreement with experimental data with a largest deviation of 2%. Open porosity has a greater effect on resistivity than closed porosity. An increase of open porosity by 40% leads to a resistivity increase by 250% while the same increase in closed porosity gives rise to a resistivity increase of only 25%. The influence of true density on electrical resistivity is not significant.