Lithium-sulfur batteries (LSBs) maintain vital promise for next-generation vitality storage as a result of ultrahigh potential vitality density. Nonetheless, their commercialization is hindered by the shuttle impact and sluggish response kinetics of lithium polysulfides (LiPSs). Herein, a hierarchical catalyst composed of cubic Mo2C nanoparticles anchored on N-doped carbon nanospheres (δ-Mo2C@NC) is designed through a facile boron-doping engineering, which concurrently mitigates LiPSs shuttling and facilitates sulfur conversion reactions. The incorporation of boron dopant into the δ-Mo2C@NC framework considerably will increase energetic websites and enhances electron/ion pathways, synergistically promoing robust adsorption and environment friendly catalytic conversion for LiPSs. Furthermore, the digital construction of δ-Mo2C is optimized by upshifting the Mo d-band middle. This enhancement promotes stronger Mo 3d/S 2p orbital hybridization between δ-Mo2C@NC and LiPSs, thus accelerating sulfur redox kinetics. Consequently, the LSB outfitted with the δ-Mo2C@NC catalyst displays exceptional charge functionality (459 mAh g-1 at 3 A g-1) and long-term biking stability (a capability decay of 0.045% per cycle over 500 cycles at 1 A g-1). These findings spotlight the potential of δ-Mo2C-based catalysts in suppressing shuttle impact and paves the best way for designing superior electrocatalysts towards high-energy and long-life LSBs.
