Synergistically Enhanced Electrochemical Performance of Hierarchical MoS₂/TiNb₂O₇ Hetero-nanostructures as Anode Materials for Li-Ion Batteries

Abstract

As potential high-performance anodes for Li-ion batteries (LIBs), hierarchical heteronanostructures consisting of TiNbO nanofibers and ultrathin MoS2 nanosheets (TNO@MS HRs) were synthesized by simple electrospinning/hydrothermal processes. With their growth mechanism revealed, the TNO@MS HRs exhibited an entangled structure both for their ionic and electronic conducting pathways, which enabled the synergetic combination of one- and two-dimensional structures to be realized. In the potential range of 0.001-3 V vs Li/Li, the TNO@MS HR-based LIBs exhibited high capacities of 872 and 740 mAh g after 42 and 200 cycles at a current density of 1 A g, respectively, and excellent rate performance of 611 mAh g at 4 A g. We believe that the fabrication route of TNO@MS HRs will find visibility for the use of anode electrodes for high capacity LIBs at low cost.

Sandwich‐like MoS2@SnO2@C with High Capacity and Stability for Sodium/Potassium Ion Batteries

“…The diffraction peaks at 14.12°, 32.91°, 58.76°, and 69.01° can be indexed to MoS 2 (JCPDS No. 75‐1539), and among them, the peak at 14.12° points to a kind of stacked layered structure . Compared with the MoS 2 as shown in the inset of Figure a, the composite with a lower degree of (002) reflection, indicating that (002) interlayer spaces of MoS 2 have been enlarged in MoS 2 @SnO 2 @C …”

Zn(Cu)Si2+xP3 Solid Solution Anodes for High‐Performance Li‐Ion Batteries with Tunable Working Potentials

“…[25,26] In addition to the XRD analysis, we further performed Raman spectroscopy analysis. More specifically, the cubic ZnS crystal structure can also be confirmed by the observation of the exposed (220) and (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) crystal planes along the zone axis of [001], as indicated by d-spacings of lattice fringes in Figure 1f. The morphology of the ZnSi 2 P 3 powder was further examined using field-emission scanning electron microscopy (FESEM; Figure S1, Supporting Information) and low-magnitude transmission electron microscopy (TEM, Figure 1e).…”

“…To address these issues, various strategies have been developed, including nanostructure engineering, porous structure tuning, and surface modification with coatings. [13][14][15][16][17][18] For example, ternary composites Fe-Cu-Si, Sn-Ni-C, and P-Sn 4 P 3 -graphene delivered much better cyclability and higher initial Coulombic efficiency than the relevant binary composite electrodes. Considering the large specific capacity, phosphorus has been introduced into Si to develop binary compounds of SiP 2 and SiP.…”

Enhanced Kinetics over VS4 Microspheres with Multidimensional Na+ Transfer Channels for High‐Rate Na‐Ion Battery Anodes

“…As imilarp henomenon hasa lso been found in the hetero-nanostructures of MoS 2 /TiNb 2 O 7 . [37] PP-VS 4 firmed by the corresponding distinct diffraction ring patterns in the FFT (inset of Figure 2c)a nd SAED pattern ( Figure 2f). Specifically,t he interaction of (2 24)a nd (114)p lanes originating from different nanoblocks appears in the PB-VS 4 microspheres( Figure 2c).…”

“…The interconnection (defined as “bridging”) of the crystal lattices originating from different nanoblocks sets up the connect channels for Na + /e − transfer across the homogeneous interface of nanoblocks. A similar phenomenon has also been found in the hetero‐nanostructures of MoS 2 /TiNb 2 O 7 . PP‐VS 4 nanoparticles exhibit lattice fringes with two interplanar spacings of 5.57 and 5.29 Å (Figure b), corresponding to (1 1 0) and (0 2 0) planes, and the interaction of (1 1 0) and (0 2 0) planes originating from different nanoparticles appears in the PP‐VS 4 microspheres.…”