Vanadium niobium carbide (VNbCTx) bimetallic MXene derived V5S8-Nb2O5@MXene heterostructure for efficiently boosting the adsorption and catalytic performance of lithium polysulfide

V 5 S 8 –Nb 2 O 5 @MX heterostructure derived from VNbCT x MXene using a sequential oxidation–sulfidation strategy to boost the adsorption and catalytic performance of LiPSs, exhibiting a capacity of 1508 mA h g −1 at 0.1 C and superior cycling stability.