Synthesis and Study of Composite Aerogels Based on Graphene Oxide and MXene for Lithium-Sulfur Batteries

Lithium-sulfur batteries are recognized as next-generation energy storage systems due to high theoretical capacity of 1675 mAh g-1 and specific energy density of 2600 Wh kg-1. However, for their stable operation, there are unresolved problems: low electrical conductivity of sulfur and its species, active material loss and cell’s volumetric expansion during prolonged charge/discharge. Graphene aerogels with high surface area, porosity and electrical conductivity can serve as matrices for uniform deposition of large amounts of sulfur. 2D MXene possesses high electrical conductivity and polarity, making them promising candidates for the formation of matrices that can chemically bind sulfur and its species.

The goal of the project is to develop and study various electrically conductive matrices with high surface area and porosity based on graphene aerogels and their composites with MXene for application as a host for sulfur cathode and separator modifier, and to improve electrochemical performance and lifetime of lithium-sulfur batteries.