In Situ Encapsulation of SnS₂/MoS₂ Heterojunctions by Amphiphilic Graphene for High-Energy and Ultrastable Lithium-Ion Anodes.

ABSTRACT: Lithium-ion batteries with transition metal sulfides (TMSs) anodes promise a high capacity, abundant resources, and environmental friendliness, yet they suffer from fast degradation and low Coulombic efficiency. Here, a heterostructured bimetallic TMS anode is fabricated by in situ encapsulating SnS₂/MoS₂ nanoparticles within an amphiphilic hollow double-graphene sheet (DGS). The hierarchically porous DGS consists of inner hydrophilic graphene and outer hydrophobic graphene, which can accelerate electron/ion migration and strongly hold the integrity of alloy microparticles during expansion and/or shrinkage. Moreover, catalytic Mo converted from lithiated MoS₂ can promote the reaction kinetics and suppress heterointerface passivation by forming a building-in

SUBMITTER: Yu W 

PROVIDER: S-EPMC11423093 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature