Enhanced Multiple Anchoring and Catalytic Conversion of Polysulfides by Amorphous MoS3 Nanoboxes for High-Performance Li-S Batteries.

The practical implementation of lithium-sulfur batteries is obstructed by the poor conductivity, sluggish redox kinetics, notorious shuttle effect, large volume variation, and low areal loading of sulfur electrodes. Herein, to conquer these main bottlenecks of sulfur electrodes, we have meticulously designed amorphous N-doped carbon/MoS 3 (NC/MoS 3 ) nanoboxes with hollow-porous architectures as an advanced sulfur host. Benefiting from the enhanced conductivity by the N-doped carbon, reduced shuttle effect by the strong chemical interaction between unsaturated Mo and lithium polysulfides, improved redox reaction kinetics by the catalytic effect of MoS 3 , great tolerance of volume variation and high sulfur loading arising from flexible amorphous materials with hollow-porous structures, the amorphous NC/MoS 3 nanoboxes enabled sulfur electrodes to deliver a high areal capacity with superior rate capacity and decent cycling stability. Moreover, the proposed synthetic strategy can be generalized to fabricate other amorphous metal sulfides nanoboxes, which are expected to show promising applications in the field of energy storage and conversion.