Preparation and electrochemical performance of sulfur/ mesoporous carbon composites as cathodes for lithium-sulfur batteries

Sulfur/mesoporous carbon composites were achieved by melt infiltration of sulfur into mesoporous carbon which was prepared by template method. SEM images show the Sulfur/mesoporous carbon composites are sphere with uniform diameter about 500 nm and TEM illustrate sulfur with 2 nm size is infiltrated in mesoporous carbon. XRD, BET and TG was employed to analysis the sulfur/mesoporous carbon composites. When the sulfur/ mesoporous carbon composites were applied as cathode material for lithium sulfur, it exhibited high electrochemical performance. The initial discharge specific capacity of the sulfur/mesoporous carbon composites is as high as 1 519 mAh·g^-1 at the current densities of 200 mA·g^-1, and can remain 835 mAh·g^-1 even after 200 cycles.