Fabrication of cZIF-67/Ti3C2 Nanocomposites As Sulfur Host For Lithium-Sulfur Batteries

It is of great importance to develop high-performance energy storage systems that modern society needs for next-generation technologies such as electric vehicles, consumer electronics, and grid-scale storage. Lithium-sulfur (Li-S) batteries are one of the promising candidates for high-performance energy storage systems due to the high theoretical capacity of the sulfur. On the other hand, some drawbacks such as insulating nature of the sulfur and the polysulfide solubility limits the wide-spread application of Li-S batteries. Nanocomposite host materials with high surface area and conductive nature has a potential to improve the stability of sulfur cathodes. In this study, the MOF-derived heteroatom doped carbon (cZIF-67) and two dimensional Ti3C2 MXene materials were used to fabricated cZIF-67/Ti3C2 nanocomposites. The fabricated nanocomposites were used as sulfur host material for Li-S batteries. After the structural and chemical characterizations, S/cZIF-67/Ti3C2 nanocomposite cathodes were used in Li-S batteries, and their performance-related properties were examined. With the fabricated S/cZIF-67/Ti3C2 cathodes, the adverse effects caused by the insulating nature of sulfur and lithium polysulfides are eliminated.