Sythesis And Elechemical Performance Of Antimony Alloy Of Anode Material For Sodium-ion Battery

Developed rechargeable batteries in recent years,lithium ion batteries due to its good performance in electronic industry has been widely used in electronics.As one of the lithium ion battery substitutes,sodium ion batteries have the advantages of lower cost and higher safety performance.At present,the development of the sodium ion batteries is limited by the anode materials.It has been becoming the hot research topic inexploring the high capacity and cycle performance of sodium anode materials storage.For the anode material,the alloy material has a large platform for the theoretical specific capacity and low operating voltage.Antimony electrode material has high theoretical capacity?660 mAh/g?,and low operating voltage?<1 V?high electrical conductivity,non-toxic low cost,high reversible alloying/alloying advantages.However the antimony base material has the defects of volume expansion,low first cycle coulomb efficiency and poor cycle performance for sodium ion batteries.The special structure of antimony alloy could make up the defects for enhancing the electrochemical perpoty of anode materials.This article main research content is as follows:?1?Because of the high capacity and low cycle performance of transition metal anode material,the antimony alloy?SbSn?@rGO composite with 80 nm size of metal nanoparticles has been prepared by chemical coprecipitation.The changing trend of alloy morphology has been tested under different reaction temperature.As sodium ion battery anode,SbSn@rGO delivered the high initial discharge capacity of 700 mAh/g,charge capacity of 620 mAh/g at 1500 mA/g and reversible capacity of 260 mAh/g after 200 cycles.?2?The Sb₂S₃ nanowires cluster has been prepared by hydrothermal precess.The structure change of nanowire morphology is explored under the different hydrothermal temperature.Sb₂S₃ nano wires cluster with larger specific surface area and high length-diameter ratio could shorten the sodium ion transport distance.It can improve the charge transfer and electronic conductivity by the high dislocation density between line and line.As sodium ion battery anode,Sb₂S₃ nanowires deliver the high initial discharge capacity of 487 mAh/g,charge capacity of 245 mAh/g at1200 mA/g and reversible capacity of 368 mAh/g after 100 cycles.?3?It has been provided the novel uniform Sb₂O₃@C@SnO₂ submicrospheres with multilayer core-shell hollow structure for used in sodium-ion batteries using glucose as carbon source whose by combustion of the carbonaceous layer for the phase separation of the cores and shells.As an anode for NIBs,the Sb₂O₃@C@SnO₂composite delivered the high initial discharge capacity of 476 mAh/g,charge capacity of 395 mAh/g at 1500 mA/g.After 50 cycles,it can deliver reverible capacity 488mAh/g and 295 mAh/g at 150 mA/g and 1500 mA/g respectively.