Sulfur Cathode for High Performance Lithium Sulfur Batteries
In this research, electrochemical properties of lithium sulfur battery were investigated by applying mesoporous carbon and carbon fiber sheet to sulfur cathode. Mesoporous carbon with controllable pore sizes (4nm, 12nm, 25nm) was fabricated and the pores are filled with sulfur for mesoporous carbon/sulfur composites. The optimal pore size of mesoporous carbon was chosen by cell performance test. Carbon fiber sheet was also applied to cathode as a frame structure to have chemical reaction even higher thickness of electrode with maximum sulfur loading. Using those mesoporous carbon/sulfur composites and carbon fiber sheet, lithium sulfur pouch cell was designed, fabricated and tested.