Enhanced electrochemical performance of flower-like SnS2/NC@GO composite anodes for lithium-ion batteries

Lithium Storage Properties of TiC‐Modified SnS2 Nanosheets

“…23-0677). For SnS 2 /TiC nanosheets, the strong diffraction peaks located at 15.0°, 28.2°, 32.1°, and 50.0°can be assigned to the (001), (100), (101), and (101) planes of hexagonal SnS 2 and the peaks at SnS 2 -pBC Hydrothermal 409 mAh g À 1 at 10 A g À 1 after 1500 cycles [19] SnS 2 /TiO 2 Hydrothermal 450 mAh g À 1 at 0.065 A g À 1 after 90 cycles [20] MoO 3 /SnS 2 nanowire Two-step synthesis 504 mAh g À 1 at 0.1 A g À 1 after 100 cycles [12] SnS 2 /graphene paper (SGP) Novel hydrothermal 593 mAh g À 1 at 0.1 A g À 1 after 200 cycles [21] SnS 2 /NC@GO Solvothermal and annealing 603 mAh g À 1 at 0.1 A g À 1 after 50 cycles [18] NiCo 2 S 4 / SnS 2 Template-free hydrothermal 627 mAh g À 1 at 1 A g À 1 after 300 cycles [9] LEGr@SnS 2 microwave-assisted solvothermal 664 mAh g À 1 at 0.3 A g À 1 after 200 cycles [22] SnS 2 /C-rGO Hydrothermal and low-temperature CVD 952 mAh g À 1 at 0.1 A g À 1 after 90 cycles The decrease in the crystallinity of the samples with high TiC contents is related to the presence of smaller, thinner SnS 2 nanosheets.…”

“…To address these flaws, many researchers try to improve electrochemical performances of SnS 2 ‐based anodes for Li‐ion batteries by choosing different materials and methods [9–23] . One strategy is to synthesize nanostructured SnS 2 , in forms including nanosheets, [11] nanospheres, [9] and nanowires [12] .…”

“…To address these flaws, many researchers try to improve electrochemical performances of SnS 2 -based anodes for Li-ion batteries by choosing different materials and methods. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] One strategy is to synthesize nanostructured SnS 2 , in forms including nanosheets, [11] nanospheres, [9] and nanowires. [12] The nanostructure can ameliorate the huge volume change in SnS 2 during cycling and also increase electrode/electrolyte contact areas, thus shortening the diffusion path of Li + : however, nanostructured SnS 2 is prone to severe structural agglomeration during cycling, degrading of its electrochemical performance.…”

“…[13] Furthermore, another effective strategy is modifying the SnS 2 nanostructure with conductive materials, such as carbon nanotubes, [14] carbon nanofibers, [15] or graphene, [10,16] enhancing both its electronic conductivity and structural stability. [17] Among them, graphene is widely used as a coating material on account of its excellent electronic conductivity, high specific surface area, and superior mechanical flexibility; [18] however, excessive numbers of surface defects on graphene sheets will cause irreversible intercalation of lithium, resulting in higher losses after the first cycle. Besides, most of the preparation processes are too complex, expensive, and time-consuming.…”

Fast Charge Transfer Kinetics Enabled by Carbon‐Coated, Heterostructured SnO2/SnSx Arrays for Robust, Flexible Lithium‐Ion Batteries

“…Between 200 and 430 °C, the weight loss is caused by the combustion of carbon or/and oxidation of SnS x . [38,43] It can be calculated that the content of carbon in SnO 2 @C is ~0.83 %, but the contents of carbon in SnS x @C and SnO 2 /SnS x @C cannot be accurately calculated due to the simultaneous occurrence of several reactions, i. e., the combustion of carbon or/and the oxidation of SnS x . In addition, a small amount of metallic Sn (that is from the high-temperature reduction) may be oxidized between 200-350 °C, making the accurate determination of carbon content impossible.…”