Understanding the improved performance of sulfur-doped interconnected carbon microspheres for Na-ion storage

查看全文 作　　者：Xinran [1,2]Yuan;Siming [1]Chen;Jinliang [1]Li;Junpeng [1]Xie;Genghua [1]Yan;Botian [3]Liu;Xibo [1]Li;Rui [2]Li;Likun [4]Pan;Wenjie [1]Mai

机构地区：[1]Department of Physics,Siyuan Laboratory,Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials,Jinan University,Guangzhou,Guangdong,China;[2]School of Advanced Materials,Shenzhen Graduate School,Peking University,Shenzhen,Guangdong,China;[3]Department of Chemistry and Biological Engineering,Guilin University of Technology,Guilin,China;[4]Shanghai Key Laboratory of Magnetic Resonance,School of Physics and Electronic Science,East China Normal University,Shanghai,China

出　　处：《Carbon Energy》索引2021年第3卷第4期,共12页

基　　金：Fundamental Research Funds for the Central Universities,Grant/Award Number:21617330;National Natural Science Foundation of China,Grant/Award Numbers:21703081,51702056,51772135;Ministry of Education of the People's Republic of China,Grant/Award Number:6141A02022516。 摘　　要：As one of the low-cost energy storage systems,Na-ion batteries(NIBs)have received tremendous attention.However,the performance of current anode materials still cannot meet the requirements of NIBs.In our work,we obtain sulfur-doped interconnected carbon microspheres(S-CSs)via a simple hydrothermal method and subsequent sulfurizing treatment.Our S-CSs exhibit an ultrahigh reversible capacity of 520 mAh g^(-1) at 100 mA g^(-1) after 50 cycles and an excellent rate capability of 257 mAh g^(-1),even at a high current density of 2 A g^(-1).The density functional theory calculations demonstrate that sulfur doping in carbon favors the adsorption of Na atom during the sodiation process,which is accountable for the performance enhancement.Furthermore,we also utilize operando Raman spectroscopy to analyze the electrochemical reaction of our S-CSs,which further highlights the sulfur doping in improving Na-ion storage performance. 关键词：electrochemical enhancement mechanism electrochemical reaction Na-ion batteries sulfur-doped interconnected carbon microspheres

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Understanding the improved performance of sulfur-doped interconnected carbon microspheres for Na-ion storage

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