The provided thin coating layers on the cathode could stabilize the surface during the insertion and extraction of the Li + ions. In addition, the interaction with the active materials present in the electrolyte is limited via the PEALD coating. Moreover, the higher discharge capacity of the NMC@Al2O3 than that of the other cathodes could be assigned to the Al diffusion into the NMC811 crystal lattice, causing a boost to the interlayer space. This phenomenon results in feasible Li + insertion with a lower essential activation energy. LiPF6, the most known lithium salt in the electrolytes, suffers from the HF reactive spaces, which damages the electrode surfaces during charging/discharging cycling. Also, they form a resistive layer on the electrode surface, diminishing the lithiation/delithiation. Based on the literature, the addition of the coating layer to the cathode plays the role of HF scavenger, leading to suppressing HF propagation. This prevents the surface from degradation during extensive cycling, lower impedance, and superior discharge capacity compared with the bare cathode powder. Additionally, the coated layers could provide larger surface area, as well as numerous reaction sites, resulting in higher capacity which might be due to the superior regions for the adsorption and desorption of the Li + ions.