Spider Web-Structured Sb2MoO6@C@CNFs Composites with Conductive-Stable Dual Carbon Skeletons Toward Durable Sodium-Ion Batteries

Abstract

(Sb)Antimony-based materials are considered as promising anode materials for sodium-ion batteries(SIB) due to their high theoretical capacity. However, antimony-based materials still face the problem of volume expansion during the sodiation/desodiation process. A method has been reported to prepare Sb2MoO6@C@CNFs nanocomposites with a spider web structure using a simple hydrothermal, electrostatic spinning technique. Polyacrylonitrile (PAN) and polypyrolium (PPY) were co-carbonated to form a unique N-doped carbon skeleton with both electrical conductivity and structural stability. Due to its unique N-doped carbon skeleton, the Sb2MoO6@C@CNFs anode exhibited excellent electrochemical performance with a reversible capacity of 234 mAh g-1 after 500 cycles at a current density of 2 A g-1.