Sulfur confined MXene hosts enabling the use of carbonate-based electrolytes in alkali metal (Li/Na/K)-sulfur batteries

Room-temperature alkali metal–sulfur batteries are promising alternatives to lithium-ion because of their high capacity and low inherent cost. Herein, we report MXene (Ti3C2Tx) as a host confine sulfur (S8), enabling the use commercialization-friendly carbonate electrolyte in batteries. The multilayer structure provides tunable spacing for S8 confinement, its unique interlayer prevents adverse polysulfide-carbonate reactions.