Robust Artificial Interlayer with High Ionic Conductivity and Mechanical Strength toward Long-Life Na-Metal Batteries.

ABSTRACT: Sodium metal, benefiting from its high theoretical capacity and natural abundance, is regarded as a promising anode for sodium-metal batteries (SMBs). Unfortunately, the uncontrollable sodium dendrites formation caused from the sluggish ion-transport kinetics and fragile solid electrolyte interphase (SEI) interlayer induces a low Coulombic efficiency and poor cycling stability. Constructing an artificial SEI interlayer with high ionic conductivity, stability, and mechanical toughness is an effective strategy for Na-metal anode, yet it still presents major challenge for high current density and long cycling life. Herein, an artificial SEI interlayer composed of Na-Sn alloy, Sn, and Na₂Te (denoted as NST) is designed via in-situ conversion/alloying reaction of tin telluride (SnTe)

SUBMITTER: Xia X 

PROVIDER: S-EPMC11936041 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature