Fig. 5. The effect of oCVD PT coating on the electrochemical performance of LiCoO₂. (A) The comparison of discharge curves at different C-rates for the two LiCoO₂ electrodes. (B) Statistical comparison of cell capacities (four samples) at different C-rates tested at 3.0–4.2 V. (C) The comparison of electrochemical impedance spectroscopy of the two types of coin cells measured at 4.0 V. (D) Capacity degradation of LiCoO₂ electrodes tested at 5C in the voltage range of 3.0–4.5 V.