Cathode half-cell of all-solid-state battery, modified with LiPO3 glass

Abstract

Electrochemical Methods were used to study the Pt|Li_0.9CoO₂|(Li₇La₃Zr₂O₁₂ + LiPO₃ glass)|Li_0.9CoO₂|Pt symmetric cell simulating the operation of the cathode of a solid-state power cell. It was shown that the glassy electrolyte serves in the system for organizing an ionic contact between the solid electrolyte and the cathode material. The current-breaking method and impedance spectroscopy demonstrated that the resistance of the cell is about 600 Ω at a temperature of 325°C. The overvoltage is 88 mV at a current density of 13 µA cm^–2. The plot describing the dependence of the current density on voltage is of the activation type, i.e., the main contribution to the polarization comes from the activation component.