Abstract
A simplified mathematical model of a thin porous electrode with a solid phase reagent have been used to find the quantitative relation between the specific resistance of solid phase active substance NiOOH/Ni(OH)2 and its volume specific resistance which can be measured by potential jump resulting from the current switching. The proposed method was used for establishing of dynamics of specific resistance change of particles of NiOOH/Ni(OH)2 at the discharge process.