MicrostructuresandPropertiesofHoneycombSulfur/carbonBlack/MoS2Composites

Microstructure and property of sulfur/carbon black composites prepared by ball milling were studied. Sulfur/carbon black composites were obtained by melting the mixture of sulfur and carbon black in 155 ℃ and dispersing evenly in carbon black after hydrothermal reaction. Thus, its conductive properties were improved. Moreover, microstructure and property of honeycomb sulfur/carbon black/MoS2 prepared by hydrothermal method as a cathode material for lithium-sulfur batteries were studied. The initial discharge specific capacity of the material at 0.2 A/g current density is 838.495 mA·h/g, and the 55.14% after 100 weeks of cycling. It is indicated that MoS2 can not only combine with polysulfides through electrostatic action or the action of chemical bonds, but also honeycomb porous structure. MoS2 can fix polysulfides groups and prevent their shuttle. Therefore, the cycling performance of the battery is effectively improved.