Cyclic voltammetry of the 3 rd cycle of all specimens is figured out in Figure to recognize the oxidationreduction behavior. Almost symmetric behavior was observed for all prepared half-cells, confirming the proper reversibility of the charge/discharge cycle. In the NMC cathode structures, the superior capacity is commonly attained through the Ni 3+ to Ni 4+ transition. In the curves, the sharp peaks were appeared in the range from 3.7 to 3.8 V, attributed to the extraction of the Li + ions from the cathode configuration. Moreover, the peaks in the range of 3.9 to 4.1 V could be corresponded to the transition of hexagonal and monoclinic phases to each other. The work function of the Al2O3 coating substance was lower than that of the MoO3 layer, meaning less required energy toward emitting the electrons. This could lead to superior electron emission and so providing better electrochemical performance. Additionally, Al2O3 was less prone to oxidization than the MoO3 film, resulting in more stability during the time.