| 초록 |
Although lithium-sulfur(Li-S) batteries have been expected as a promising high-energy-density battery system,entangled problems in each cell component hamper their practical use.Especially in cathode, low electronic/ionic conductivity of sulfur based activematerial, continuous dissolution of polysulfide, and sluggish redox kineticscause the poor cycle stability and energy density. For the energy density of500~600 W h kg-1, achievement of high areal sulfur loading and lowelectrolyte to sulfur (E/S) ratio is needed, but conventional carbon/sulfurcomposite-type cathodes have limitations to satisfy this requirement. In thisseminar, next-generation sulfur cathode with the electrocatalyst acceleratingthe sulfur conversion reaction is introduced as a powerful platform to simultaneouslyimprove the cycle stability, reversible capacity, and rate capability. |
