Hierarchical Composite of Sb2S3 decorated on highly crumpled Ti3C2Tx nanosheets for enhanced sodium storage properties

Hierarchical composites with good electrical conductivity and sufficient voids are in great demand for the high-performance storage of sodium ions but typically limited due to the complicated synthesis procedure. Here, we report on a facile wet-chemistry synthesis of Sb2S3 nanoparticles onto highly crumpled Ti3C2Tx nanosheets, which form three-dimensional (3D) architecture with good electrical conductivity. The homogeneously distributed Sb2S3 nanoparticles suppress the restacking issue of the Ti3C2Tx nanosheets, which creates rich voids for rapid electron/Na+ transport and minimizes the volume expansion effect from Sb2S3 upon repeated charging/discharging cycles. When used as a sodium-ion battery (SIB) anode, the composite shows a high capacity (329 mAh g(-1) at 100 mA g(-1) after 100 cycles) and good rate capability and cycling performance (215 mAh g(-1) at 2 A g(-1) and maintains 118 mAh g(-1) after 500 cycles). We believe the metallic interconnected network and the 3D architecture synergistically result in a promoted sodium-ion storage performance. This work provides a simple strategy to construct MXene-based hybrids with a porous network structure for application fields, such as energy storage, photocatalysis, adsorption, and microwave absorption. (C) 2021 Published by Elsevier Ltd.

Automated summary

In this study, a facile wet-chemistry synthesis method was used to deposit Sb2S3 nanoparticles onto Ti3C2Tx nanosheets, forming a highly conductive 3D structure for sodium-ion battery anodes. The composite exhibited high capacity, good rate capability, and cycling performance, showing potential for energy storage applications.