Rationally Incorporated MoS₂/SnS₂ Nanoparticles on Graphene Sheets for Lithium-Ion and Sodium-Ion Batteries

Abstract

Herein, we have designed and first synthesized a unique ternary hybrid structure by simultaneously growing SnS and MoS particles on graphene sheets (denoted as MoS/SnS-GS) via one-pot hydrothermal route. The charge incompatibility between MoO and graphene oxide with negative charged functional groups on surface can be compromised with the aid of Sn cations, which renders the final formation of SnS and MoS on GS surface. This is the first report of the cohybridization of MoS and SnS with GS matrix from anionic and cationic precursors in the absence of premedication of graphene surface. When MoS/SnS-GS acts as anodes for lithium-ion batteries, the hybrids exhibit much better cycling stability than MoS-GS and SnS-GS counterparts. The compact adhesion of MoS/SnS nanoparticles helps offset the undesired result of destruction of electrode materials resulting from volume expansion during repeated cycles. Furthermore, by combination with their synergetic effect on interface and the presence of discrepant asynchronous electrochemical reactions for SnS and MoS, MoS/SnS-GS hybrids are endowed with improvement of electrochemical capabilities. Besides, they also showed outstanding Na-storage ability.

A Simple One‐Pot Strategy for Synthesizing Ultrafine SnS2 Nanoparticle/Graphene Composites as Anodes for Lithium/Sodium‐Ion Batteries

“…During the simple one-pot preparation of SnS 2 /graphene composites, we added more graphene oxide for SG75. [3,8,26,33,[38][39][40][41][42][43] Such great electrochemical performance showst hat the simple and one-pot synthesized SG75 composite has great potential in large-scale applications as the anode for LIBs. [37] Thus, the SG75 electrode obtained am ore stable cycling performance (thec ycling performance of pure graphene oxide and commercialS nS 2 is shown in Figure S6).…”

“…No evident particlea ggregation is observed on the surfaceo ft he electrode and the ultrafinen anoparticles are still homogeneously dispersed on the graphene nanosheets (Figure 7a,b), which is similar to the pristine material. (3) Owing to the ultrafinen anoparticles of SnS 2 ,t he diffusion pathway of electrons and alkali ions can be shortened, resulting in fast lithium/sodium storage. Thus, the advantages of SG75 prepared by the one-pot method can be summarized as follows (as presented in Figure 7g).…”

“…[1][2][3] Amongv arious SnS 2 -based materials, SnS 2 /graphene composites have been extensively studied owing to the fact that the electrochemical performance of pristine SnS 2 could be efficiently improved by the introduction of graphene. [1][2][3] Amongv arious SnS 2 -based materials, SnS 2 /graphene composites have been extensively studied owing to the fact that the electrochemical performance of pristine SnS 2 could be efficiently improved by the introduction of graphene.…”

Synergistical Coupling Interconnected ZnS/SnS2 Nanoboxes with Polypyrrole‐Derived N/S Dual‐Doped Carbon for Boosting High‐Performance Sodium Storage

“…Additionally, embedding the metal chalcogenides into the carbonous materials by constructing a delicate hierarchical structure can further enhance the electrode conductivity and accommodate the volume expansion . Jiang et al designed a ternary hybrid by simultaneously growing SnS 2 and MoS 2 on graphene sheets, displaying the improved electrochemical property and capacity retention . More impressively, doping with heteroatoms (N, S, B, P, etc.)…”

2D/2D SnS2/MoS2 layered heterojunction for enhanced supercapacitor performance

“…MoS 2 is a typical layer structure with weak van der Waals interaction which is similar to SnS 2 . Therefore, 2D SnS 2 and MoS 2 nanosheets can form high‐quality heterointerfaces to improve electronic performance …”