SnS/C nanocomposites for high-performance sodium ion battery anodes

Abstract

Sodium-ion batteries have been considered as one of the most promising types of batteries, beyond lithium-ion batteries, for large-scale energy storage applications. However, their deployment hinges on the development of new anode materials, since it has been shown that many important anode materials employed in lithium ion batteries, such as graphite and silicon, are inadequate for sodium-ion batteries.We have simply prepared novel SnS/C nanocomposites through a top-down approach as anode materials for sodium-ion batteries. Their electrochemical performance has been significantly improved when compared to bare SnS, especially in terms of cycling stability and rate capabilities. SnS/C nanocomposites exhibit excellent capacity retention, at various current rates, and deliver capacities as high as 400 mA h g À1 even at the high current density of 800 mA g À1 (2C). Ex situ transmission electron microscopy, X-ray diffraction and operando X-ray absorption near edge structure studies have been performed in order to unravel the reaction mechanism of the SnS/C nanocomposites.

Computational screening of anode materials for potassium‐ion batteries

“…Grand potential diagrams as a function of the chemical potential of K were obtained to investigate the reaction potential and theoretical capacity of the anode materials. Metal/metalloid anodes and binary metal compounds, including the anions P, O, and S that were reported as promising anode materials for LIBs and SIBs, were thoroughly explored in this study.…”

Modern Nanocomposites and Hybrids as Electrode Materials Used in Energy Carriers

“…Templated hybrid nanostructures, such as flexible films of CNT/AuNW hybrid structures, are used in supercapacitors, which increase the stability and power density (low contact resistance) many times thanks to nanotubes [ 225 ]. Additionally, work [ 226 ] has shown that flexible energy storage devices could be based on nanocomposite paper. Nanoporous cellulose paper embedded with aligned carbon nanotube electrode and electrolyte constitutes the basic unit.…”

Nano Sn2S3 Embedded in Nitrogenous‐Carbon Compounds for Long‐Life and High‐Rate Cycling Sodium‐Ion Batteries

“…As the battery is discharged to 0.70 V, monoclinic Na 4 Sn 3 S 8 (PDF #29-1277), tetragonal Sn (PDF #04-0673), and SnÀ Na alloy (namely: Na z Sn, z > x + y) are detected. [26,38,39] When the battery is discharged to 0.4 V, the peak intensity of Na z Sn gets stronger, while the peak intensity of Na 4 Sn 3 S 8 /Sn tends to be weaker, suggesting a phase transition from Na 4 Sn 3 S 8 /Sn to Na z Sn. With the discharging process further decreased to 5 mV, the XRD peak of Na 4 Sn 3 S 8 disappears, implying that all the Na 4 Sn 3 S 8 is completely converted into Na 2 S and Na z Sn.…”