Lim, Hyojun Yu, Seungho Chang, Won Young Chung, Kyung Yoon Choi, Wonchang Kim, Sang-Ok 2024-11-07T02:30:14Z 2024-11-07T02:30:14Z 2024-11-07 2024-12 https://pubs.kist.re.kr/handle/201004/151002 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 yolk. The Sn@C/SiOC nanohybrid demonstrates high specific capacity (？500 mAh g？1 at 1 A g？1), remarkable rate performance up to 10 A g？1, and ultrastable cyclability (91.1% retention after 1500 cycles at 5 A g？1). This yolk？shell nanohybrid structuring can guide the development of various high-capacity anodes for energy storage applications. English Wiley-VCH Verlag Boosting the Sodiation Kinetics of Sn Anode Using a Yolk-Shell Nanohybrid Structure for High-Rate and Ultrastable Sodium-Ion Batteries Article 10.1002/advs.202408450 1 Advanced Science, v.11, no.48 Advanced Science 11 48 Y scie scopus 001357225100001 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article ELECTROLYTE NANODOTS STORAGE SIOC TIN NANOPARTICLES HIGH-PERFORMANCE LITHIUM SILICON OXYCARBIDE MICROSIZED SN CARBON hierarchical yolk-shell nanohybrid high-capacity anodes Na-ion batteries sodiation kinetics