Few-layer WS₂nanosheets with oxygen-incorporated defect-sulphur entrapped by a hierarchical N, S co-doped graphene network towards advanced long-term lithium storage performances

Abstract

One-step preparation of few-layer oxygen incorporation in defect-sulphur WS2 nanosheets embedded into the NSG framework exhibits excellent Li-ion storage properties.

Synergistic Engineering of Defects and Heterostructures Enhance Lithium/Sodium Storage Properties of F‐SnO2‐x‐SnS2‐x Nanocrystals Supported on N,S‐Graphene

“…A broad peak emerges at 20.6°, corresponding to the (002) diffraction plane of carbon (N/S-RGO). [15] It should be noted that the faint diffraction peak intensity of SnS 2 (001) is decreased (Figure S2b), which can explain the existence of S defects in F-SnO 2-x -SnS 2-x @N/S-RGO. The Raman spectra of F-SnO 2-x -SnS 2x @N/S-RGO and control samples (Figure 2b) confirm the formation of SnS 2 by the characteristic peaks of out-of-plane A 1g located at 314.6 cm À 1 and the weak in-plane E g peak at 220.4 cm À 1 .…”

“…The peak intensity ratios (I D /I G ) are � 1.03, reflecting the existence of a defect or disordered carbon in the N/S-RGO. [15,17] Furthermore, the 3D F-SnO 2-x -SnS 2-x @N/S-RGO nanostructure displays a large Brunauer-Emmett-Teller (BET) specific surface area of 120.9 m 2 g À 1 and abundant micro/ mesoporous features (Figure S3). Therefore, this F-SnO 2-x -SnS 2x @N/S-RGO composite can offer a large contact area of electrolyte and electrode and enough space for the volume variation of F-SnO 2-x -SnS 2-x during cycles.…”

A biopolymer functionalized two-dimensional WS2@TiO2 nanocomposite for in vitro biomedical and photocatalytic applications: facile synthesis and characterization

“…No peaks indicating impurity phases are detected. 40 The presence of multilayer (ML) WS 2 nanosheets oriented along the c axis is indicated by the dominating (002) sharp peak. This peak is slightly more intense than the other diffraction peaks.…”

“…The characteristic diffraction peaks at 2y = 14.31, 27.91, 33.61, 39.41, 43.81, 49.51, and 59.21 in the planes of WS 2 (red line) are indexed to the (002), (004), (101), (103), (006), (105), and (008) lattice planes, respectively. No peaks indicating impurity phases are detected 40. The presence of multilayer (ML) WS 2 nanosheets oriented along the c axis is indicated by the dominating (002) sharp peak.…”

Facile Preparation and Boosted Electrochemical Properties of Carbon/Carbon Composite Electrodes for Supercapacitors

“…[19][20][21][22][23][24][25][26] Now, carbon materials with different morphologies have been reported, such as carbon nanofibers, flower-like carbon microspheres, and porous bulk carbon. [19,[27][28][29] In general, the specific capacitances of pure PI-derived carbon materials are relatively low, regardless of their morphologies. [30,31] Thus, people usually need to adopt some methods, making pores increase the specific surface area of carbon materials.…”