Figure 4.

a) Galvanostatic charging–discharging curves of the solid‐state LIB using the Li₃OCl film as an electrolyte, graphite as an anode, and LiCoO₂ as a cathode. The inset shows the schematic diagram of the multilayer film battery structure. b) Cycling performance of the solid‐state thin‐film battery. The battery was charged and discharged at 10 mA g⁻¹ between 2.2 and 4.2 V. The current density and capacities were calculated from the weight of the LiCoO₂ film.