Realizing High‐Performance Li/Na‐Ion Half/Full Batteries via the Synergistic Coupling of Nano‐Iron Sulfide and S‐doped Graphene

Abstract

Iron sulfide (FeS) anodes are plagued by severe irreversibility and volume changes that limit cycle performances. Here, a synergistically coupled hybrid composite, nanoengineered iron sulfide/S‐doped graphene aerogel, was developed as high‐capacity anode material for Li/Na‐ion half/full batteries. The rational coupling of in situ generated FeS nanocrystals and the S‐doped rGO aerogel matrix boosted the electronic conductivity, Li+/Na+ diffusion kinetics, and accommodated the volume changes in FeS. This anode system exhibited excellent long‐term cyclability retaining high reversible capacities of 422 (1100 cycles) and 382 mAh g−1 (1600 cycles), respectively, for Li+ and Na+ storage at 5 A g−1. Full batteries designed with this anode system exhibited 435 (FeS/srGOA||LiCoO2) and 455 mAh g−1 (FeS/srGOA||Na0.64Co0.1Mn0.9O2). The proposed low‐cost anode system is competent with the current Li‐ion battery technology and extends its utility for Na+ storage.

3D hierarchical networks constructed from interlayer-expanded MoS2 nanotubes and rGO as high-rate and ultra-stable anodes for lithium/sodium-ion batteries

“…1h further reveals that the MoS 2 nanotubes are wrapped with graphene, which shows an interlayer spacing of 0.37 nm that corresponds to the (002) plane of rGO. 43,44 More impressively, the lattice fringe spacing of NC-MoS 2 @rGO is 0.98 nm, much larger than the d -spacing of 0.62 nm assigned to the (002) plane of conventional MoS 2 , which can be attributed to the insertion of the N–C layer obtained by in situ carbonization of octylamine between two adjacent MoS 2 monolayers (the inset of Fig. 1h).…”

Ultimate Resourcization of Waste: Crab Shell-Derived Biochar for Antimony Removal and Sequential Utilization as an Anode for a Li-Ion Battery

“…In the following cycles, the ordered strong peak at 0.77 V in the next cycles corresponded to the form of alloyed Li 3 Sb. , Correspondingly, the peak at 1.13 V in the anodic process is associated with the delithiation reaction of Li 3 Sb to Sb. The peaks at 1.35 and 1.96 V are attributed to the insertion of Li ions into iron oxides and the oxidation process of iron, respectively. , Additionally, a new peak at 1.53 V appears in the second cycle, which denotes the phase transformation of a Li x Fe 3 O 4 complex and the deformation of the SEI film. − In the subsequent cycles (from third to fifth), the peaks of the cathode and the anode remain nearly overlapped, meaning good reversibility of the Cs/Fe-La-SbO x electrode (the compared CV curve of Cs/Fe-La is shown in Figure S7). Figure b shows the typical charge and discharge curves for several cycles of Cs/Fe-La-SbO x with a current density of 1.0C.…”

“…The discharge/charge profiles of the Cs/Fe-La-SbO x electrode show a decreasing trend of specific capacity with increasing mass loading. An appropriate mass loading with 1.3 ± 0.2 mg/cm 2 was chosen for further investigation. , To investigate the stability of Cs/Fe-La-SbO x electrodes, the analysis was done at 1C (shown in Figure e). The Cs/Fe-La-SbO x electrode exhibits excellent cycling performance with an initial capacity of 820.1 mAh/g and an initial Coulombic efficiency of 92.9% at 1C.…”

A Multifunctional Catalytic Interlayer for Propelling Solid–Solid Conversion Kinetics of Li2S2 to Li2S in Lithium–Sulfur Batteries

“…The two peaks should be caused by SO x species at higher binding energies due to surface oxidation of samples. [32] Figure 3e presents the nitrogen adsorption-desorption isotherms that disclose the porous structures of these samples. The presence of micro-and mesopores in FeSC@NSC can be identified by the type IV hysteresis loop.…”

“…The two peaks should be caused by SO x species at higher binding energies due to surface oxidation of samples. [ 32 ]…”