Crystalline/Non-Crystalline Carbon Co-Modified Strategy to Construct N,S Co-Doped Carbon Layer Wrapped Fe_(0.95)S_(1.05)/Carbon Nanotubes for Enhanced Lithium Storage Property  

作　　者：Liang Chen Lan−Yun Yang Li−Ting Zeng Xu Liu Xin−Rui Li Yu−Shan Tian Wei Wang Gang−Yong Li Chen−Xi Xu Zhao−Hui Hou 

机构地区：[1]Key Laboratory of Hunan Province for Advanced Carbon‒based Functional Materials,School of Chemistry and Chemical Engineering,Hunan Institute of Science and Technology,Yueyang,414006,China [2]College of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha,410004,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2025年第1期93-101,共9页金属学报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(No.51804116);the Science Technology Talents Lifting Project of Hunan Province(No.2022TJ–N16);the Natural Science Foundation of Hunan Province(No.2024JJ4022,2023JJ30277);the China Postdoctoral Fellowship Program(GZC20233205);the Science and Technology Innovation Program of Hunan Province(No.2022RC3037);the National Innovation and Entrepreneurship Training Program for College Students(No.S202410543035).

摘　　要：Due to their high theoretical capacity and abundant resources,transition metal sulfides are regarded as a prospering alternative to replace the commercial graphite anode in lithium-ion batteries(LIBs),particularly for large-scale energy storage and conversion applications.Nonetheless,low conductivity,easy agglomeration and obvious volume change greatly impede their practical application.In this work,a novel crystalline/non-crystalline carbon co-modified strategy is proposed to fabricate N,S co-doped carbon(NSC)layer wrapped Fe_(0.95)S_(1.05)/carbon nanotubes(CNTs)composite(Fe_(0.95)S_(1.05)/CNTs@NSC)through a simple Fenton reaction followed by a sulfurization process.Systematical characterizations and analyses reveal that this strategy well combines the advantages of crystalline CNTs and non-crystalline NSC,ensuring good conductivity and a high contribution to capacity from the carbon matrix.Meanwhile,the joint encapsulation of Fe_(0.95)S_(1.05)by both CNTs and NSC can significantly mitigate the agglomeration and volume change of Fe_(0.95)S_(1.05)during the continuous charge/discharge process.Benefiting from these advantageous features,the resultant Fe_(0.95)S_(1.05)/CNTs@NSC composite displays much improved cycling stability and rate capability when compared to the counterparts.Clearly,our research offers a distinct and innovative approach to design and construct advanced transition metal sulfides/carbon composite anodes for LIBs.

关 键 词：Lithium-ion batteries Crystalline/non-crystalline carbon Joint encapsulation Fe_(0.95)S_(1.05)/CNTs@NSC Lithium storage property 

分 类 号：TB3[一般工业技术—材料科学与工程]