Antimony doped SnO2nanowire@C core-shell structure as a high-performance anode material for lithium-ion battery.

SnO2is considered as one of the high specific capacity anode materials for Lithium-ion batteries. However, the low electrical conductivity of SnO2limits its applications. This manuscript reports a simple and efficient approach for the synthesis of Sb-doped SnO2nanowires (NWs) core and carbon shell structure which effectively enhances the electrical conductivity and electrochemical performance of SnO2nanostructures. Sb doping was performed during the vapor-liquid-solid synthesis of SnO2NWs in a horizontal furnace. Subsequently, carbon nanolayer was coated on the NWs using the DC Plasma Enhanced Chemical Vapor Deposition approach. The carbon-coated shell improves the Solid-Electrolyte Interphase stability and alleviates the volume expansion of the anode electrode during charging and discharging. The Sb-doped SnO2core carbon shell anode showed the superior specific capacity of 585 mAhg-1after 100 cycles at the current density of 100 mA g-1, compared to the pure SnO2NWs electrode. The cycle stability evaluation revealed that the discharge capacity of pure SnO2NWs and Sb doped SnO2NWs electrodes were dropped to 52 and 152 mAh g-1after100th cycles. The process of Sb doping and carbon nano shielding of SnO2nanostructures is proposed for noticeable improvement of the anode performance for SnO2based materials.