Fig. 4: Electrochemical performance of lithium–sulfur batteries with/without oxides.
From: Dual redox mediators accelerate the electrochemical kinetics of lithium-sulfur batteries
a, b Galvanostatic cycling performance of sulfur electrodes under a current density of 167.5 mA g−1 (0.1C rate). c Self-discharge capacity loss of sulfur electrodes after resting for 24 h at 2.1 V (vs. Li+/Li) during the 5th cycle. d Specific capacities of S–RGO and S–Nb2O5–MnO2 electrodes under various current densities. e Representative voltage–capacity profiles of S–RGO electrode and f S–Nb2O5–MnO2 electrode under current densities of 0.5 and 2.0 mA cm−2.
