Enhanced Sodium‐Ion Storage Performance of a 2D MoS₂ Anode Material Coated on Carbon Nanotubes

Abstract

Molybdenum disulfide (MoS2) is considered a promising anode material for sodium‐ion batteries (SIBs). However, it suffers from poor kinetics and rapid capacity decay. In this work, a coaxial heterostructure composed of MoS2 nanosheets coated on carbon nanotubes (CNTs) is reported, where the MoS2 layers are less stacked at the surface of the CNTs substrate with an enhanced interlayer spacing, which is prepared through a simple one‐pot hydrothermal preparation. The MoS2@CNTs composite material is proven to have superior rate performance as an anode material for SIBs, which delivers 508, 418, 359, 305, 258, and 183 mAh/g at current densities of 0.1, 0.2, 0.5, 1, 2, and 5 A/g, respectively, together with excellent cycling stability to retain 360 mAh/g after 400 cycles at 0.5 A/g, owing to the robust combination of MoS2 and CNT components. This work offers a way to synthesize heterostructured composite materials with great performance superiority for large‐scale energy storage systems.

Rational design of hollow flower-like MoS2/Mo2C heterostructures in N-doped carbon substrate for synergistically accelerating adsorption-electrocatalysis of polysulfides in lithium sulfur batteries

“…This discrepancy is primarily attributed to the higher sintering temperature employed in the latter synthesis. In figure 1(d), the existence of C, Mo and S elements are identified by XPS of H-MoS 2 /Mo 2 C MFs, and these results are consistent with the results of XRD and EDS mapping [26,27]. A one step method was used to prepare hierarchical Mo-PDA hollow spheres in a water-in-oil system under room temperature.…”

“…Deconvolution of the Mo 3d of H-MoS 2 /NC NFs revealed six characteristic peaks. The peaks at 229.6 eV and 230.4 eV in the red-shaded area correspond to Mo 4+ 3d 5/2[27,28], while the peaks at 232.7 eV and 233.9 eV in the blue-shaded area represent Mo 4+ 3d 3/2[29,30], both indicative of MoS 2 . In comparison to pure MoS 2 , the Mo 3d binding energy of H-MoS 2 /Mo 2 C/NC NFs shifts towards lower energy, signifying elevated electron cloud density around MoS 2 and enhanced electrical conductivity.…”

Covalent Pinning of Highly Dispersed Ultrathin Metallic-Phase Molybdenum Disulfide Nanosheets on the Inner Surface of Mesoporous Carbon Spheres for Durable and Rapid Sodium Storage

“…(a) Rate capability of HCS, pure M-MoS 2 , and M-MoS 2 @HCS electrodes. (b) Comparison of the rate capability of the M-MoS 2 @HCS electrode with the typical MoS 2 -based anodes for SIBs. − Cycling performance of the M-MoS 2 @HCS electrode at current densities of (c) 0.1 A g –1 and (d) 1.0 A g –1 .…”

A review of the energy storage aspects of chemical elements for lithium-ion based batteries

“…Oxygen is pivotal to the synthesis of different transition metal oxides (TMOs) and their derived nanoparticles, which can be used as electrode materials in lithium-ion batteries (LIBs). Nanotechnological architectures are used to make supercapacitors, sensors, molecular electronics, fuel cells, batteries and advanced energy devices [2][3][4][5][6][7] .…”