| 초록 |
Lithium-Sulfur Battery is getting tremendous attention because of sulfur’s high theoretical capacity and abundant resources. However, lithium polysulfide(PS) which is reductive product of discharge process is the biggest problem as PS is soluble to electrolyte so undermine battery’s performances. In this research, polythiophene and polyethylene glycol based cross-linked polymer coated sulfur-carbon composite cathode is studied. Polythiophene moiety introduced electron-conductivity and Polyethylene glycol moiety introduced lithium ion-conductivity. In addition, polymer coating had PS capturing ability, therefore, electrochemical performance of battery is enhanced. Synthesis of cross-linked polymer, polymer coated cathode’s electrochemical performance, polymer’s PS capturing ability is analyzed by H-NMR, IR, Coin Cell Test, UV-vis spectroscopy. |
