Engineering stable and fast sodium diffusion route by constructing hierarchical MoS2 hollow spheres

Two-dimensional layered transition metal dichalcogenides, such as MoS2, have been considered to be a promising anode material for sodium storage. However, their performance have been limited by the sluggish sodium diffusion kinetics. In this work, high performance anode material was obtained through constructing hierarchical MoS2 nanosheets assembled hollow spheres. The used self-templating method show more feasibility than the commonly reported template removal-involved routes. The prepared hollow structure can also provide rapid and stable electron/sodium ion transport without the assistance of conducting substrates, which enables the MoS2 anodes exhibit a high specific capacity of 527 mAh g(-1) at 0.1 A g(-1). Even at a high current density of 1 A g(-1), capacity of 357 mAh g(-1) can still be obtained after 500 cycles (capacity retention similar to 94.5%). This work provides a facile way towards high performance MoS2 anode materials for sodium-ion battery. (C) 2021 Elsevier Inc. All rights reserved.

Automated summary

This study demonstrates a high-performance anode material for sodium storage by constructing hierarchical MoS2 nanosheets assembled hollow spheres. The prepared hollow structure enables rapid and stable electron/sodium ion transport, leading to high specific capacity and excellent capacity retention of MoS2 anodes. This work provides a facile way towards high performance MoS2 anode materials for sodium-ion battery.