MoS₂ Decorated Fe₃O₄/Fe_1–xS@C Nanosheets as High-Performance Anode Materials for Lithium Ion and Sodium Ion Batteries

Abstract

Fe3O4/Fe1–x S@C@MoS2 nanosheets consisting of Fe3O4/Fe1–x S nanoparticles embedded in carbon nanosheets and coated by MoS2 were synthesized via a facile and scalable strategy with assistance of NaCl template. With Fe3O4/Fe1–x S@C@MoS2 nanosheets composite as an anode for LIBs and SIBs, the Fe3O4/Fe1–x S@C@MoS2 nanosheets composite shows outstanding electrochemical performance because of the synergistic effects of the Fe3O4/Fe1–x S nanoparticles, carbon nanosheets and MoS2. In this unique constructed architecture, on one hand, the carbon nanosheets can avoid the direct exposure of Fe3O4/Fe1–x SNPs to the electrolyte; on the other hand, the carbon nanosheets can buffer the volume change of Fe3O4/Fe1–x S NPs as well as suppress the aggregation of Fe3O4/Fe1–x S NPs during the cycling processes. Moreover, MoS2 can offer high interfacial contact areas between active materials/electrolyte, resulting in rapid charge transfer and higher capacity. As a consequence, Fe3O4/Fe1–x S@C@MoS2 nanosheets exhibit high reversible capacity of 1142 mAhg–1 after 700 cycles at 1.0 A g–1 and 640 mA h g–1 at 5.0 A g–1for LIBs, 402 mA h g–1 after 1000 cycles at 1.0 A g–1and 355 mA h g–1 at 2.0 A g–1 for SIBs, respectively. This outstanding electrochemical performance indicated that the Fe3O4/Fe1–x S@C@MoS2 nanosheets have potential as anode for high-performance LIBs and SIBs.

Electrospun Single Crystalline Fork-Like K2V8O21 as High-Performance Cathode Materials for Lithium-Ion Batteries

“…Rechargeable lithium-ion batteries (LIBs) are one of the most important energy storage devices in microchips, cell phones, electric vehicles (EVs), and hybrid electric vehicles (HEVs) (Whittingham, 2004; Armand and Tarascon, 2008; Zheng et al, 2015; Ou et al, 2017; Pan et al, 2017a,b; Yang et al, 2017). Layer-structured LiCoO 2 has been extensively studied and largely used as commercial cathode materials due to their high working potential, high energy density and good cycling performance.…”

Dual‐Function Sacrificing Template‐Directed Strategy for Constructing Hollow and Core‐Shell Nonstoichiometric Fe1–xS@C Microspheres Exhibiting Ultrafast Sodium Storage

“…Figure d compares the rate performance of Fe 1–x S@C and various previously reported Fe 1–x S‐based anode materials for Na‐ion storage. Obviously, the capacity retention of Fe 1–x S@C at high current rates is considerably better than that of other Fe 1–x S‐based materials . The excellent rate behavior of Fe 1–x S@C can be ascribed to its hollow microspherical and hierarchical micro/nanostructure as illustrated in Figure .…”

Synthesis of FeS Nanoparticles Embedded in MoS2/C Nanosheets as High‐Performance Anode Material for Lithium‐Ion Batteries

“…The small grains and ultrathin thickness of the composite reduce the ion diffusion path and increase the interaction area between the active materials and electrolyte. [31,32] Recently, our research group confirmed that the addition of a small amount of…”