Boosting the Sodiation Kinetics of Sn Anode Using a Yolk-Shell Nanohybrid Structure for High-Rate and Ultrastable Sodium-Ion Batteries.

ABSTRACT: Metallic Sn (Tin) is a promising anode material for Na-ion batteries owing to its high theoretical capacity of 870 mAh g^-1. However, its large volumetric changes, interfacial instability, and sluggish sodiation kinetics limit its practical applications. Herein, a hierarchical yolk-shell nanohybrid composed of an Sn yolk and a Carbon/Silicon oxycarbide (C/SiOC) bilayer shell is prepared via the simple pyrolysis of a silicone oil dispersion containing an Sn precursor. The multifunctional bilayer helps boost sodiation kinetics by providing conductive pathways, enhancing the reversible capacity through surface capacitive reactions, and stabilizing the electrode/electrolyte interface. Abundant void interspaces inside the yolk-shell structure accommodate large volume changes of the Sn

SUBMITTER: Lim H 

PROVIDER: S-EPMC11672318 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature