首页|Engineering and understanding SnS0.5Se0.5@N/S/Se triple-doped carbon nanofibers for enhanced sodium-ion batteries

Engineering and understanding SnS0.5Se0.5@N/S/Se triple-doped carbon nanofibers for enhanced sodium-ion batteries

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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,SnS0.5Se0.5 nanoparticles coupled with N/S/Se triple-doped carbon nanofibers(SnS0.5Se0.5@NSSe-C)are designed and synthesized through electrospinning and annealing process.Benefiting from the synergistic effects of SnS0.5Se0.5 and NSSe-C,the SnS0.5Se0.5@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 SnS0.5Se0.5@NSSe-C composite are characterized by the in-situ measurements.The theoretical calculations further reveal the structural advantages of SnS0.5Se0.5@NSSe-C 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.

SnS0.5Se0.5Carbon nanofibersDopingDensity functional theorySodium ion batteries

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

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School of Electronic and Information Engineering,Changshu Institute of Technology,Changshu 215500,China

Far East Holding Group Co.,Ltd.,Yixing 214200,China

Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes,Suzhou University,Suzhou 234000,China

国家自然科学基金Jiangsu Provincial Double-Innovation Doctor ProgramAnhui Key Laboratory of low temperature Co-fired MaterialsDoctor of Suzhou University Scientific Research Foundation Project

U1832147JSSCBS202107432022LCA042020BS014

2024

10.1016/j.cclet.2023.108552

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(4)
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