5 research outputs found
One-Step Urothermal Synthesis of Li<sup>+</sup>‑Intercalated SnS<sub>2</sub> Anodes with High Initial Coulombic Efficiency for Li-Ion Batteries
Tin sulfide, as a promising anode material for Li-ion
batteries,
suffers from high-capacity loss during cycling and low initial Coulombic
efficiency, which limits its further application. In order to solve
these problems, Li+-intercalated SnS2 with expanded
interlayer spacing (0.89 nm) was prepared by the one-step urothermal
method. The successful synthesis of Li+-intercalated SnS2 is confirmed by means of X-ray diffraction, scanning electron
microscopy, transmission electron microscopy, energy-dispersive X-ray
spectroscopy, inductively coupled plasma emission spectrometer test,
and exfoliation experiment. Compared with pure SnS2, the
Li+-intercalated SnS2 electrode displays a higher
initial Coulombic efficiency (79.3%) than the pure SnS2 electrode (55%). Also, Li+-intercalated SnS2 exhibits more excellent rate performance (548.4 mAh g–1 at 2 A g–1 and 216.6 mAh g–1 at 10 A g–1) and cycling performance (647.7 mAh
g–1 at 0.1 A g–1 after 100 cycles)
One-Step Urothermal Synthesis of Li<sup>+</sup>‑Intercalated SnS<sub>2</sub> Anodes with High Initial Coulombic Efficiency for Li-Ion Batteries
Tin sulfide, as a promising anode material for Li-ion
batteries,
suffers from high-capacity loss during cycling and low initial Coulombic
efficiency, which limits its further application. In order to solve
these problems, Li+-intercalated SnS2 with expanded
interlayer spacing (0.89 nm) was prepared by the one-step urothermal
method. The successful synthesis of Li+-intercalated SnS2 is confirmed by means of X-ray diffraction, scanning electron
microscopy, transmission electron microscopy, energy-dispersive X-ray
spectroscopy, inductively coupled plasma emission spectrometer test,
and exfoliation experiment. Compared with pure SnS2, the
Li+-intercalated SnS2 electrode displays a higher
initial Coulombic efficiency (79.3%) than the pure SnS2 electrode (55%). Also, Li+-intercalated SnS2 exhibits more excellent rate performance (548.4 mAh g–1 at 2 A g–1 and 216.6 mAh g–1 at 10 A g–1) and cycling performance (647.7 mAh
g–1 at 0.1 A g–1 after 100 cycles)
One-Step Urothermal Synthesis of Li<sup>+</sup>‑Intercalated SnS<sub>2</sub> Anodes with High Initial Coulombic Efficiency for Li-Ion Batteries
Tin sulfide, as a promising anode material for Li-ion
batteries,
suffers from high-capacity loss during cycling and low initial Coulombic
efficiency, which limits its further application. In order to solve
these problems, Li+-intercalated SnS2 with expanded
interlayer spacing (0.89 nm) was prepared by the one-step urothermal
method. The successful synthesis of Li+-intercalated SnS2 is confirmed by means of X-ray diffraction, scanning electron
microscopy, transmission electron microscopy, energy-dispersive X-ray
spectroscopy, inductively coupled plasma emission spectrometer test,
and exfoliation experiment. Compared with pure SnS2, the
Li+-intercalated SnS2 electrode displays a higher
initial Coulombic efficiency (79.3%) than the pure SnS2 electrode (55%). Also, Li+-intercalated SnS2 exhibits more excellent rate performance (548.4 mAh g–1 at 2 A g–1 and 216.6 mAh g–1 at 10 A g–1) and cycling performance (647.7 mAh
g–1 at 0.1 A g–1 after 100 cycles)
One-Step Urothermal Synthesis of Li<sup>+</sup>‑Intercalated SnS<sub>2</sub> Anodes with High Initial Coulombic Efficiency for Li-Ion Batteries
Tin sulfide, as a promising anode material for Li-ion
batteries,
suffers from high-capacity loss during cycling and low initial Coulombic
efficiency, which limits its further application. In order to solve
these problems, Li+-intercalated SnS2 with expanded
interlayer spacing (0.89 nm) was prepared by the one-step urothermal
method. The successful synthesis of Li+-intercalated SnS2 is confirmed by means of X-ray diffraction, scanning electron
microscopy, transmission electron microscopy, energy-dispersive X-ray
spectroscopy, inductively coupled plasma emission spectrometer test,
and exfoliation experiment. Compared with pure SnS2, the
Li+-intercalated SnS2 electrode displays a higher
initial Coulombic efficiency (79.3%) than the pure SnS2 electrode (55%). Also, Li+-intercalated SnS2 exhibits more excellent rate performance (548.4 mAh g–1 at 2 A g–1 and 216.6 mAh g–1 at 10 A g–1) and cycling performance (647.7 mAh
g–1 at 0.1 A g–1 after 100 cycles)
Influence of hydrothermal treatment on the microstructure and oxidation resistance of a Zn<sub>4</sub>B<sub>2</sub>O<sub>7</sub>·H<sub>2</sub>O (4ZnO·B<sub>2</sub>O<sub>3</sub>·H<sub>2</sub>O) coating for C/C composites
<p>Antioxidant modification for C/C composites by <i>in situ</i> hydrothermal synthesise at 140 °C of a 4ZnO·B<sub>2</sub>O<sub>3</sub>·H<sub>2</sub>O crystallite coating has been successfully achieved. The influence of hydrothermal time on the phase composition, microstructure of the as-prepared Zn<sub>4</sub>B<sub>2</sub>O<sub>7</sub>·H<sub>2</sub>O (4ZnO·B<sub>2</sub>O<sub>3</sub>·H<sub>2</sub>O), and its antioxidant modification for C/C composites were investigated. Samples were characterised by XRD, SEM, isothermal oxidation test and TG-DSC. Results show that, 4ZnO·B<sub>2</sub>O<sub>3</sub>·H<sub>2</sub>O crystalline coating is achieved on the surface of C/C composites after the hydrothermal treatment at 140 °C for time in the range of 2–12 h. A smooth and crack-free 4ZnO·B<sub>2</sub>O<sub>3</sub>·H<sub>2</sub>O layer can be obtained when the hydrothermal time reaches 8 h. Isothermal oxidation test demonstrates that the oxidation resistance of C/C composites is improved. The as-modified composites exhibit only 1.52 g·cm<sup>−2</sup> weight loss after oxidation at 600 °C for 15 h, while the non-modified one shows a 6.57 g·cm<sup>−2</sup> weight loss after only 10 h oxidation. For the uncoated C/C composite the oxidation rate is approximately linear with time (non-protective oxidation), thus at 15 h exposure one can estimate the mass loss to be 6.57 g·cm<sup>−2</sup> after 10 h for direct comparison with the coated samples.</p