Induced bimetallic sulfide growth with reduced graphene oxide for high-performance sodium storage

Metal sulfide has been considered an ideal sodium-ion battery (SIB) anode material based on its high the-oretical capacity. Nevertheless, the inevitable volume expansion during charge-discharge processes can lead to unsatisfying electrochemical properties, which limits its further large-scale application. In this contribution, laminated reduced graphene oxide (rGO) successfully induced the growth of SnCoS4 parti-cles and self-assembled into a nanosheet-structured SnCoS4@rGO composite through a facile solvother-mal procedure. The optimized material can provide abundant active sites and facilitate Na. ion diffusion due to the synergistic interaction between bimetallic sulfides and rGO. As the anode of SIBs, this material maintains a high capacity of 696.05 mAh g-1 at 100 mA g-1 after 100 cycles and a high-rate capability of 427.98 mAh g-1 even at a high current density of 10 A g-1. Our rational design offers valuable inspiration for high-performance SIB anode materials.(c) 2023 Elsevier Inc. All rights reserved.

Automated summary

In this study, laminated reduced graphene oxide (rGO) was used to induce the growth of SnCoS4 particles and self-assembled into a nanosheet-structured SnCoS4@rGO composite through a solvothermal procedure. The optimized material showed abundant active sites and facilitated Na. ion diffusion due to the synergistic interaction between bimetallic sulfides and rGO. As the anode material of sodium-ion batteries, this composite maintained a high capacity of 696.05 mAh g-1 after 100 cycles and a high-rate capability of 427.98 mAh g-1 even at a high current density of 10 A g-1. Our rational design provides valuable inspiration for high-performance sodium-ion battery anode materials.