UCLA

Lithium-sulfur batteries, as one of most promising candidate in energy storage systems, have been under intensely investigated for almost three decades. Due to the low-cost, high energy density and long cycling properties, the state-of-art lithium-sulfur batteries meet the growing requirements of electronic devices, electrical vehicles and large-scale energy storage. However, lithium-sulfur batteries have not been applied in industrials because the dissolution of polysofide during cycling still exists a significant challenge for practical application.

This thesis focused on the fabrication of mesoporous conductive carbon structure as the cathode materials via aerosol method. The high porosity 4.099 cm3/g of the carbon particles accommodate the volume expansion and enhance the electronic conductivity of the cell. To further mitigate the dissolution of polysulfide, divinylbenzene was used to stabilized elemental sulfur as well as confine the movement of polysulfide. The coated carbon/sulfur composite performed high capacity and cycliability.