Electrospinning with sulfur powder to prepare CNF@G-Fe_(9)S_(10) nanofibers with controllable particles distribution for stable potassium-ion storage

作     者：Ting Fu Peng-Chao Li Hong-Cheng He Shuang-Shuang Ding Yong Cai Ming Zhang Ting Fu;Peng-Chao Li;Hong-Cheng He;Shuang-Shuang Ding;Yong Cai;Ming Zhang

作者机构：Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of EducationSchool of Physics and ElectronicsCollege of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha410082China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第1期

页      面：111-121页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51772082 and 51804106) the Natural Science Foundation of Hunan Province(Nos.2019JJ30002 and 2019JJ50061) 

主　　题：Iron sulfide Particles distribution Stability Potassium-ion storage 

摘      要：As anode materials of electrochemical energy storage system,metal sulfides with high theoretical capacities suffer from issues of materials smashing and deactivation due to huge volume change,resulting in the inferior cycle *** this paper,a new strategy of adding sulfur powder into the electrospinning precursor instead of employing sulfur powder during the sulfurizing treatment is proposed to prepare Fe_(9)S_(10)composites(CNF@G-Fe_(9)S_(10)-1).In those composites,most of Fe_(9)S_(10)particles are embedded in the graphene-carbon fibers with multiple *** anodes for potassium-ion batteries,CNF@G-Fe_(9)S_(10)-1 display higher rate capacities and more excellent stability(103.2 mAh·g^(-1)at 1000 mA·g^(-1)after 892 cycles)than Fe_(9)S_(10)composites synthesized by the traditional *** addition,as anodes for potassiumion hybrid capacitors,they also deliver high capacities of102.8 mAh·g^(-1)at 1000 mA·g^(-1)after 100 *** morphology characterization evidences indicate that the surface and integrity of CNF@G-Fe_(9)S_(10)-1 are more smooth and complete than the Fe_(9)S_(10)composites fabricated using a common method without sulfur power in electrospinning *** excellent stability and high capacity of CNF@G-Fe_(9)S_(10)-1 can be attributed to nearly full-wrapped structure of Fe_(9)S_(10)in the carbon matrix arising from the new *** to the formation of the structure,Fe_(9)S_(10)particles are protected from the pulverization,and the structure stability of hybrid carbon fibers is *** study may provide a new strategy for the controllable synthesis of metal sulfide-CNFs and their application for high stability energy storage.