首页|Unlocking the potential of ultra-thin two-dimensional antimony materials:Selective growth and carbon coating for efficient potassium-ion storage
Unlocking the potential of ultra-thin two-dimensional antimony materials:Selective growth and carbon coating for efficient potassium-ion storage
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
Antimony-based anodes have attracted wide attention in potassium-ion batteries due to their high the-oretical specific capacities(～660 mA h g-1)and suitable voltage platforms.However,severe capacity fad-ing caused by huge volume change and limited ion transportation hinders their practical applications.Recently,strategies for controlling the morphologies of Sb-based materials to improve the electrochem-ical performances have been proposed.Among these,the two-dimensional Sb(2D-Sb)materials present excellent properties due to shorted ion immigration paths and enhanced ion diffusion.Nevertheless,the synthetic methods are usually tedious,and even the mechanism of these strategies remains elusive,espe-cially how to obtain large-scale 2D-Sb materials.Herein,a novel strategy to synthesize 2D-Sb material using a straightforward solvothermal method without the requirement of a complex nanostructure design is provided.This method leverages the selective adsorption of aldehyde groups in furfural to induce crystal growth,while concurrently reducing and coating a nitrogen-doped carbon layer.Compared to the reported methods,it is simpler,more efficient,and conducive to the production of com-posite nanosheets with uniform thickness(3-4 nm).The 2D-Sb@NC nanosheet anode delivers an extre-mely high capacity of 504.5 mA h g-1 at current densities of 100 mA g-1 and remains stable for more than 200 cycles.Through characterizations and molecular dynamic simulations,how potassium storage kinet-ics between 2D Sb-based materials and bulk Sb-based materials are explored,and detailed explanations are provided.These findings offer novel insights into the development of durable 2D alloy-based anodes for next-generation potassium-ion batteries.
State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences(CAS),Changchun 130022,Jilin,China
School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,Anhui,China
Science and Technology Development Program of Jilin ProvinceNational Natural Science Foundation of China
NETL
NSTL
万方数据
