Carbon Nanofibers Decorated by MoS2 Nanosheets with Tunable Quantity as Self-Supporting Anode for High-Performance Lithium Ion Batteries

Abstract

Two-dimensional molybdenum disulfide (MoS2) is considered as a highly promising anode material for lithium-ion batteries (LIBs) due to its unique layer structure, large plane spacing, and high theoretical specific capacity; however, the overlap of MoS2 nanosheets and inherently low electrical conductivity lead to rapid capacity decay, resulting in poor cycling stability and low multiplicative performance. This severely limits its practical application in LIBs. To overcome the above problems, composite fibers with a core//sheath structure have been designed and fabricated. The sheath moiety of MoS2 nanosheets is uniformly anchored by the hydrothermal treatment of the axial of carbon nanofibers derived from an electrospinning method (CNFs//MoS2). The quantity of the MoS2 nanosheets on the CNFs substrates can be tuned by controlling the amount of utilized thiourea precursor. The influence of the MoS2 nanosheets on the electrochemical properties of the composite fibers has been investigated. The synergistic effect between MoS2 and carbon nanofibers can enhance their electrical conductivity and ionic reversibility as an anode for LIBs. The composite fibers deliver a high reversible capacity of 866.5 mA h g−1 after 200 cycles at a current density of 0.5 A g−1 and maintain a capacity of 703.3 mA h g−1 after a long cycle of 500 charge–discharge processes at 1 A g−1.

Forming SnS@C/MoS2 nanotubes with high specific surface area via self-sacrificing template method as superior performance anode for lithium-ion batteries

“…24 To solve these problems, we have adopted several strategies including a self-sacrificing template method (SSTM). The first strategy is to design one-dimensional (1D) material structures, such as nanowires, 25–27 nanorods 28 and nanotubes, 29 to buffer radial and circumferential stresses generated by the material during the charge–discharge cycle. 30 Jiao et al 31 designed and manufactured a porous nanotube composed of vertically arranged molybdenum disulfide nanosheets by a solvothermal method.…”

Two-Dimensional MoS2 Nanosheets Derived from Cathodic Exfoliation for Lithium Storage Applications

“…In fact, previous reports in the literature suggest that 2D MoS 2 could show a number of advantages as an anode for LIBs over other emerging materials (e.g., Si and Ge), including better cycling stability, higher rate performance and less influence of volumetric expansion [ 9 ]. In fact, recent reports where MoS 2 was combined with materials with higher electrical conductivity highlight its potential as an electrode for lithium storage in LIBs [ 11 , 12 , 13 , 14 ], and in other types of lithium batteries, such as lithium–sulfur batteries [ 15 ].…”