The electric vehicle (EV) has been drawing more attention and more widely used in recent years. However, the current Li-ion batteries cannot fully satisfy the EVs since the energy density is limited by the intercalation chemistry. The Li−O₂ battery is one of the candidates that are promising to power EVs due to its high energy density. Even numerous efforts have been made to develop Li−O₂ batteries, the low rate capability is a major obstacle that prevents the realization of this battery. In this study, we prove the feasibility of discharging-charging Li−O₂ batteries using a Li symmetric battery design at high current densities (1.0, 5.0, and 10.0 mA/cm²). The Li chips are inserted in both the anode and cathode, respectively. Results show that the over-potentials caused by the Li chip during both the charging and discharging processes are less than 1.0 V. Besides, cycling tests of Li symmetric batteries are performed at 10 mA/cm² with a cut-off capacity of 12.7 mAh. Therefore, the O₂ diffusion or reaction rate in the cathodic electrode has been demonstrated to limit the capability of discharging and charging Li−O₂ batteries at high current. It is urgent to enhance the O₂ diffusion and reaction rates to increase the rate capability of Li−O₂ batteries, which can benefit the realization of this technology. In our future work, we will pay more attention to promote O₂ diffusion in the cathodic electrode by optimizing the porous structure of the electrode for Li−O₂ batteries.