| 초록 |
Lithium sulfur batteries are considered as one of the promising next generation battery system to overcome existing limitation of lithium ion batteries owing to the high specific capacity (1675 mAh g-1), relatively low density (~ 2 g cm-3), low toxicity, and natural abundance of sulfur. In present study, we report new organosulfur cathode materials based on inverse-vulcanized polymers. The unique strategy is the use of functional linkers in the synthesis of sulfur-rich polymers to enhance the redox properties. Sulfur-rich polymer comprising 2,3,5,6-tetra(allyloxy)benzoquinone linker showed low band gap energy of 2.27 eV and improved electrical conductivity by factor of 450, compared to elemental sulfur. This positive feature enabled us to achieve unprecedently high rate performance up to 10C and long cycle life over 500 cycles. |
