INSIGHTS INTO THE ABSORPTION MECHANISM OF CARBON NANOTUBE PAPER-TITANIUM DIOXIDE AS A MULTIFUNCTIONAL BARRIER FOR LITHIUM-SULFUR BATTERIES

摘要

Lithium-sulfur (Li-S) batteries are considered to be one of the most promising energy storage devices in next generation high energy power system, owing to their high specific capacity (1675 mAh g~(-1)) and energy density (2600 Wh kg~(-1)). However,, the insulation of sulfur and high solubility of lithium polysulfides in the organic electrolyte lead to the low utilization of active materials and the poor cycling performance, which seriously impede the rapid development of Li-S batteries.