▎ 摘　　要

Sodium-ion batteries have attracted tremendously significant attention as an alternative to Li-ion batteries due to the similar electrochemical properties. However, owing to the larger atomic radius of sodium, the sodium-ion batteries have been inevitably suffered from the inferior electrochemical reaction kinetics and descending cyclic stability, limiting its practical applications. Here, sodium-ion batteries based on 3D 1T-SnS2/RGO composite electrode with highly reversible sodiation/desodiation process are realized through a facile CVD process and spray coating. It displays excellent initial specific charge and discharge capacities (766.7 mAh g(-1) and 768.8 mAh g(-1)), after 100th cycle, the charge and discharge capacities are 648.1 mAh g(-1) and 650.8 mAh g(-1), respectively, with 84.6% capacities retention ratio, indicating the excellent reversibility and high electrochemical reaction kinetics. The composite sodium-ion battery anode still delivers high specific capacities of 865.6 mAh g(-1), 758.2 mAh g(-1), 678.5 mAh g(-1), 581.2 mAh g(-1) and 503.8 mAh g(-1) at the current density of 0.1 C, 0.5 C, 1 C, 2 C and 5 C, respectively, indicating its excellent reversible sodiation/desodiation reaction and rate capability. This work confirms the high potential of the SnS2-based anode for SIBs from its highly reversible capacity and excellent rate capability and points out the significance of the rational design of three-dimensional composite anode with high reversibility and electrochemical reaction kinetics. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.