Self‐Assembled 2D WS₂ Interconnected Nanosheets: An Anode Material with Outstanding Lithium‐Storage Performance

Abstract

The unique lithium‐ion battery anodes consisting of interconnected nano‐architectures with high specific surface areas, adequate buffer space to tolerate the volume change, excellent conductivities, and admirable mechanical stabilities demand for next‐generation lithium‐ion battery (LIB). Herein this report, highly interconnected and self‐assembled tungsten disulfide nanosheets (WS2 NS) array is constructed through simple hydrothermal process. The ultrathin nature of nanosheet array can not only efficiently buffer the huge volumetric change but also abbreviate the Li‐ion and electron diffusion path. As expected, the ultrathin WS2 nanosheets array is endowed with excellent structural stability and also very fast electrochemical kinetics, and hence extraordinary lithium‐storage performance, such as delivering high capacities of 813.33 mAh g−1 at a C rate of C/8, admirable rate capability and good cycling stability, that is, 242 and 226 mAh g−1 at a C rate of 1 and 2 C, respectively, up to 600 cycles.

All-Solid-State Flexible Asymmetric Supercapacitors Based on WS2/rGO/CNT Hybrid Electrodes and Polymer-Based Ionic Liquid Electrolytes

“…01-084-1398). 21,22 The expansion of the 002 plane in WS 2 becomes evident after the integration of rGO and MWCNT, as depicted in Figure S2a,b. The broadening of the 002 plane in WS 2 /rGO/ CNT in comparison to bulk WS 2 confirms the presence of rGO and CNT in the interlayer spacing of WS 2 , which would be beneficial to restack the WS 2 layers.…”

Experimental and theoretical insights into the supercapacitive performance of interconnected WS2 nanosheets

“…2(e) correspond to the binding energies of W 4f 7/2 , 4f 5/2 , and 5p 3/2 , respectively, confirming the tetravalency of W in WS 2 -nanosheets. 33 Within the S 2p spectrum, the binding energies for the S 2p 3/2 and 2p 1/2 peaks at 162.5 and 163.7 eV, respectively, are indicative of S 2− (Fig. 2(f)).…”

2D-Layered Structure WS2 Nanosheets with Improved Electrochromism for Organic-Based Device

“…Preparation of WS 2 nanosheets.-The WS 2 nanosheets introduced into the ECD have been prepared via a facile one-step hydrothermal method. 38 In brief, 0.3 g Na 2 WO 4 •2H 2 O was dissolved in 15 ml deionized water; A certain amount of GSH was dissolved in the deionized water. The two solutions were mixed and transferred to a 50 ml reaction kettle.…”