Fig. 4: Electrochemical performance of Li–MoS2/CNT–S full cells.
From: 2D MoS2 as an efficient protective layer for lithium metal anodes in high-performance Li–S batteries
a, Cyclic voltammetry of the Li–MoS2/CNT–S cell within the voltage window of 1.5–3.0 V for the initial cycles. b, Rate capabilities of the Li–MoS2/CNT–S cell with a sulfur content of 33 wt% in the 3D CNT–S cathode tested at 0.1, 0.5, 1.0 and 2.0 C. c, The GCD profiles of the corresponding Li–MoS2/CNT–S cell for up to 1,200 cycles at 0.5 C. d, Calculated Ragone plot (energy versus power density) based on the electrochemical data presented in c with respect to the mass of the whole cathode (sulfur composite, carbon black, binder, aluminium current collector, and so on). The specific energy and power are compared with other references. e, Long-term cycling performance of Li–S battery with the 3D CNT–S cathode (~33 wt% S content) and the MoS2-coated Li anode measured at 0.5 C for 1,200 cycles. The average specific capacity decay is 0.013% per cycle and the Coulombic efficiency at 1,200th cycle is around 98%. The schematic inset illustrates the basic kinetics of Li+ between two electrodes during cycling.
