Electrospinning-Enabled Si/C Nanofibers with Dual Modification as Anode Materials for High-Performance Lithium-Ion Batteries

作     者：Yi Yan Huajun Guo Zhixing Wang Xinhai Li Guochun Yan Jiexi Wang Yi Yan;Huajun Guo;Zhixing Wang;Xinhai Li;Guochun Yan;Jiexi Wang

作者机构：School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083China Engineering Research Center of the Ministry of Education for Advanced Battery MaterialsCentral South UniversityChangsha 410083China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2021年第34卷第3期

页      面：329-336页

核心收录：

学科分类：0808[工学-电气工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51974370) the Program of Huxiang Young Talents(No.2019RS2002) the Innovation-Driven Project of Central South University(No.2020CX027) the Central Universities of Central South University(No.2018zzts436) 

主　　题：Lithium-ion batteries Silicon/carbon composite Surface modification Graphene Electrospinning 

摘      要：In this work,silicon@reduced graphene oxide/pyrolytic carbon nanofibers(Si@RGO/C NFs)composite with double modified layer is prepared through electrospinning,stabilization and *** this composite,polyethylene oxide-polypropylene oxide-polyethylene oxide(P123,a non-ionic surfactant)is introduced as the dispersant,which can make silicon nanoparticles evenly dispersed in electrospinning solution to prevent it from *** modified layer can buffer the volumetric expansion of silicon nanoparticles,prevent direct contact between silicon and electrolyte as well as enhance the electrical ***,carbon fibers synthesized by electrospinning can encapsulate silicon@graphene composite internally to form a double modified *** composite with double modified layer can further alleviate the volume change of silicon nanoparticles and avoid direct contact between silicon and electrolyte to form a stable *** to the above-mentioned merits,the Si@RGO/C NFs composite exhibits excellent cyclic stability and superior rate ***,it maintains a specific capacity of 929 mA h g^(-1)with the retention ratio of 83.1%after 100 cycles at 0.5 A g^(-1)and delivers an outstanding rate capability of 1003 mA h g^(-1)at 2 A g^(-1).