Engineering and understanding SnS_(0.5)Se_(0.5)@N/S/Se triple-doped carbon nanofibers for enhanced sodium-ion batteries  

作　　者：Fanjun Kong Yixin Ge Shi Tao Zhengqiu Yuan Chen Lu Zhida Han Lianghao Yu Bin Qian 

机构地区：[1]School of Electronic and Information Engineering,Changshu Institute of Technology,Changshu 215500,China [2]Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes,Suzhou University,Suzhou 234000,China [3]Far East Holding Group Co.,Ltd.,Yixing 214200,China

出　　处：《Chinese Chemical Letters》2024年第4期226-230,共5页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China (No.U1832147);Jiangsu Provincial Double-Innovation Doctor Program (No.JSSCBS20210743);Anhui Key Laboratory of low temperature Co-fired Materials (No.2022LCA04);The Doctor of Suzhou University Scientific Research(No.2020BS014)。

摘　　要：Tin-based chalcogenides have attracted tremendous attention as an anode material for sodium storage owing to their unique structure and high theoretical capacity. Unfortunately, the large volume change and poor conductivity lead to sluggish reaction kinetics and poor cycling performance. Herein, SnS_(0.5)Se_(0.5)nanoparticles coupled with N/S/Se triple-doped carbon nanofibers(SnS_(0.5)Se_(0.5)@NSSe-C) are designed and synthesized through electrospinning and annealing process. Benefiting from the synergistic effects of SnS_(0.5)Se_(0.5)and NSSe-C, the SnS_(0.5)Se_(0.5)@NSSe-C nanofibers exhibit a high reversible capacity and ultralong cycle life at higher current density for sodium-ion batteries. Furthermore, the sodium storage mechanism and electrochemical reaction kinetics of the SnS_(0.5)Se_(0.5)@NSSe-C composite are characterized by the in-situ measurements. The theoretical calculations further reveal the structural advantages of SnS_(0.5)Se_(0.5)@NSSeC composite, which exhibits a high adsorption energy of Na+. This work can provide a novel idea for the synthesis of ternary tin-based chalcogenides and is beneficial for the investigation of their reaction kinetics.

关 键 词：SnS_(0.5)Se_(0.5) Carbon nanofibers DOPING Density functional theory Sodium ion batteries 

分 类 号：TQ340.64[化学工程—化纤工业] TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]