As it was just mentioned, sulfur electrode plays as the cathode and Li metal as anode for Li-S batteries. In our study, the sulfur particles mixed with those additives and binders are simplified by ideal materials with averaged properties to reduce the simulation cost. To simplify the simulation, the porous sulfur cathode was modeled with homogenous materials with uniform properties. For the Li metal anode, all its properties are from related references . The thickness of the Li metal anode is adjusted to the areal capacity of the sulfur cathode, ensuring the constant N/P capacity ratio. For the boundary conditions, the single-layer Li-S full cell is placed in an atmosphere of room temperature (30 °C ) and detailed electrochemical boundary conditions are constrained from the current density under various discharging rates.