首页|Three-dimensional 1T-SnS2 wrapped with graphene for sodium-ion battery anodes with highly reversible sodiation/desodiation
Three-dimensional 1T-SnS2 wrapped with graphene for sodium-ion battery anodes with highly reversible sodiation/desodiation
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NSTL
Elsevier
? 2022 Acta Materialia Inc.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.
NSTL
Elsevier
