Analysis of an all-solid state (AASS) cell: 〖LiC〗_(6 (s))/Al- doped 〖LLZO〗_((s)) electrolyte/ 〖CoO〗_(2 (s))

Based on the fundamental principles of chemical engineering thermodynamics and electrochemical engineering, the formulation was developed for the analysis of the all-solid state electrochemical cell: . The formulation presented in this paper was then used to obtain the analytical data for the determination of the electrochemical performance of this cell. Some of the analytical results are highlighted as follows: The cell open-circuit voltage varies from 3.988 to 3.678 volt over the temperature-variation range from 25 to 250. The cell’s maximum elective energy delivery efficiency varies from about 91 to 87% over the above given temperature range. The percent ratio of the reversible thermal energy to the total thermal energy involved in the cell’s electrochemical reaction varies from about 9.0 to 13.0% over the same temperature range. For the cell electrolyteof thickness, the ohmic voltage loss varies from 5.0 to 0.1 mV for the cell temperature variation from 25 to 250 at the geometric current density of whereas it is from 10.0 to 0.2 mV at the geometric current density of over the above given temperature range. For the cell electrolyte thickness of the ohmic voltage loss variation is from 10.0 to 0.2 mV for the cell temperature variation from 25 to 250 at the geometric current density of whereas at the geometric current density of the ohmic voltage loss is from 20.0 to 0.4 mV for same electrolyte thickness of and over the same cell operational temperature from 25 to 250. At 25the cell cathode activation polarization voltage loss varies approximately from 5 to 100 mV at the geometric current density variation from 0.1 to For the same geometric current variation, the cathode activation polarization voltage loss variation is from 0.43 to 8.67 mV at 150 18 to 3.52 at 200 and 0.09 to 1.72 mV at 250 The cell anode activation polarization voltage loss at 25varies approximately from 3.4 to 68.2 mV for the cell geometric current density variation from 0.1 to For this same range of the geometric current density variation, the cell anode activation polarization voltage loss variation is from 0.1 to 1.2 mV at 150 0 to 0.4 mV at 200 and 0.0 to 0.2 mV at 250 At 25the specific diffusion-induced voltage loss varies from 3.4 to 68.2 mV in the cell anode for the geometric current density variation from 0.1 to whereas it is (50 – 150 mV) in the cell cathode at the geometric current density of depending on the lithiated state of cobalt oxide in the cell’s cathode. At 25 and the cell’s geometric current density of the cell operational voltage is 3.7820 volt. At these conditions, the cell actual electric power delivery is found to be equal to .