Laser-Derived Interfacial Confinement Enables Planar Growth of 2D SnS2 on Graphene for High-Flux Electron/Ion Bridging in Sodium Storage

Abstract

Establishing covalent heterointerfaces with face-to-face contact is promising for advanced energy storage, while challenge remains on how to inhibit the anisotropic growth of nucleated crystals on the matrix. Herein, face-to-face covalent bridging in-between the 2D-nanosheets/graphene heterostructure is constructed by intentionally prebonding of laser-manufactured amorphous and metastable nanoparticles on graphene, where the amorphous nanoparticles were designed via the competitive oxidation of Sn-O and Sn-S bonds, and metastable feature was employed to facilitate the formation of the C-S-Sn covalent bonding in-between the heterostructure. The face-to-face bridging of ultrathin SnS2 nanosheets on graphene enables the heterostructure huge covalent coupling area and high loading and thus renders unimpeded electron/ion transfer pathways and indestructible electrode structure, and impressive reversible capacity and rate capability for sodium-ion batteries, which rank among the top in records of the SnS2-based anodes. Present work thus provides an alternative of constructing heterostructures with planar interfaces for electrochemical energy storage and even beyond.

Reduced Graphene Oxide Modulated FeSe/C Anode Materials for High‐Stable and Long‐Life Potassium‐Ion Batteries

“…The result may be associated with the low carbonization or selenization temperature that is not high enough to promote the formation of CÀ Se-M covalent bonds, usually formed at high temperatures (above 700 °C) or long reaction time (above 12 h). [38][39][40][41] In the Se 3d spectrum, the peaks at 55.3/54.6 eV were identified as Se 3d 3/2 /Se 3d 5/2 , representing the FeÀ Se bond of FeSe. The peak at 58.2 eV may come from the SeÀ O bond.…”

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

“…Furthermore, according to the equation i (V) = k 1 v + k 2 v 1/2 , the contribution ratios of capacitive-controlled (k 1 n) and diffusion-controlled (k 2 n 1/2 ) processes can be quantitatively analyzed. [76][77][78] For example, Fig. 4c depicts that the capacitive contribution (the red region) accounts for 91.5% of the total capacity at 0.8 mV s À1 .…”

Recent advances in SnS2-based nanomaterials as high-performance anodes for sodium ion batteries

“…Copyright 2022, reprinted with permission from Springer Nature. 52 (f) Ex situ HRTEM and SAED images of the FL-SnS 2 /RGO electrodes at the discharge process of no sodiation, 1.72 V, 1.69 V, and 0.01 V. Copyright 2017, reprinted with permission from American Chemical Society. 53 High-resolution TEM images tracking the sodium insertion in SnS 2 in real-time (g-m).…”

“…In situ Raman spectra of A-SnS 2 @G (d) and SnS 2 /G (e) at various discharge and charge depths. Copyright 2022, reprinted with permission from Springer Nature 52. (f) Ex situ HRTEM and SAED images of the FL-SnS 2 /RGO electrodes at the discharge process of no sodiation, 1.72 V, 1.69 V, and 0.01 V. Copyright 2017, reprinted with permission from American Chemical Society 53.…”