Fig. 4
Electrochemical performance of the lithium–sulfur batteries. a Cycle performance of Se0.06SPAN at various current densities in ether-based electrolyte. b Electrochemical discharge and charge profiles of Se0.06SPAN at various cycles. The tests are performed at 0.4 A g−1. c Capacity and Coulombic efficiencies versus cycle number for Se0.06SPAN. The red curve report capacities relative to the weight of the S and Se in the cathode, whereas the data represented by blue curve are the corresponding capacities based on the overall composite mass
