Controllable graphene incorporation and defect engineering in MoS2-TiO2 based composites: Towards high-performance lithium-ion batteries anode materials

MoS2/C/C nanofiber with double-layer carbon coating for high cycling stability and rate capability in lithium-ion batteries

“…the lithiation process and electrode structure evolution after long-term cycling. As demonstrated in the schematic and shown in SEM images, the pure MoS 2 spheres electrode showed serious structure fading and formed into continuous film after long-term cycling because of direct exposure of MoS 2 to the electrolyte [15,27]. This could lead to the profound decomposition of MoS 2 nanospheres and the dissolution of metallic Mo and Li 2 S. The MoS 2 /C electrode also exhibited obvious structure change, but part of the nanosphere structures was still observed at the up surface of the electrode, due to the thin layer of carbon coating protection [34].…”

“…The carbon component can enhance the electronic conductivity and concurrently buffer the volume changes of MoS 2 during the lithiation/delithiation reaction. At the same time, carbon materials can also act as a binder between the S/Li 2 S and the molybdenum to prevent the loss of polysulfide during cycling [1,23,27,28]. Based on these properties, hybrid MoS 2 -carbon systems can lead to better electrode kinetics and more stable cycling performance [29][30][31][32][33].…”

C@TiO2/MoO3 Composite Nanofibers with 1T‐Phase MoS2 Nanograin Dopant and Stabilized Interfaces as Anodes for Li‐ and Na‐Ion Batteries

“…Their initial Coulombic efficiencies (CEs) of 67.7, 65.8, and 63.4 %i ncreased to almost1 00 %a fter severalc ycles. [34,35] As excepted, more stable capacity couldb eo btained with TM-200( 100th capacity: 251.1 mAh g À1 ,r etention:8 3.1 %) as SIB anode compared with TM-400 (100th capacity:4 1.8 mAhg À1 ,r etention:1 8.4 %), as shown in Figure8d. The capacities of TM-200 in the first cycle were 568.22a nd 302.29 mAh g À1 ,w hich were al ittle highert han those of the TM-400 anode of 375.66 and 226.58 mAh g À1 .D ue to the larger ionic radius and slower kinetics compared with Li ions, TM-200 in SIBs delivered lower capacities and CE.…”

“…Beside the galvanostatic traces, the cycling performance revealed other details about the electrochemistry of lithiation (sodiation)/delithiation (desodiation) by carbon capsulationa nd sulfuration of MoO 3 . Despite disparities between TM-200 and previously reported MoS 2 -based composite electrodes, the cycling performance and capacity at high current density show certaina dvantages, [11,14,17,18,27,29,[34][35][36][37] as summarized in Table S1. TM-200 and TM-300 showeds imilarc apacity retentions of 80.7 and 78.5 %a fter 100 cycles, which were much highert han that of TM-400 (38.8 %).…”

Facile Synthesis of Molybdenum Disulfide/Carbon Nanocomposites in Polyacrylic Acid Hydrogel as Anode for Lithium‐Ion Batteries

“…Particularly, the relatively broad interlayer space (0.62 nm) can accommodate more Li ions and contribute to fast electron/ion transport during the lithiation/delithiation process . However, the shortcomings caused by a serious volume change during the repeated charge–discharge cycles and intrinsic low electronic conductivity lead to poor cycling stability and rate performance, which restrict its potential practical application . To solve these problems, a series of effective strategies have been developed during the past years, including the fabrication of MoS 2 with various geometries in nanoscale, expanding the interlayer distance of MoS 2 to accommodate more Li ion, and combining MoS 2 with conductive carbonaceous materials such as graphene, carbon spheres, carbon nanotubes, and carbon fibers .…”