The performance of a reversible solid oxide cell (RSOC) was simulated considering the properties of the cathode and anode materials, such as porosity, permeability, and operating temperature. Simulation results showed that the temperature distributions in the cathode and anode differ because of their contrasting thermal responses. The performance of the fuel cell was improved at high temperature, porosity, and permeability. However, excessive heat caused thermal expansion. Therefore, the cathode and anode materials of the fuel cell must be selected to maintain optimal operating temperature, porosity, and permeability as they affect hydrogen production and overall performance. The conductivity of electrode materials decreases with increasing temperature, and the conduction mechanism is similar to that of metallic conductivity. During the operation of an oxide fuel cell (SOFC), as the temperature rises and falls, the different thermal expansion coefficients of the electrolyte and cathode materials cause peeling and cracking, which can lead to a reduction in battery performance. Because of the correlation between the production temperature and the amount of chlorine produced by hydrogen, the application of sensors that can measure both the temperature and the hydrogen concentration is an important direction of development.