Embedding partial sulfurization of iron-cobalt oxide nanoparticles into carbon nanofibers as an efficient electrode for the advanced asymmetric supercapacitor  

作　　者：Wen-Jie Liu Ming Yuan Jia-Biao Lian Guo-Chun Li Qiu-Ping Li Fen Qiao Yan Zhao 

机构地区：[1]Institute for Energy Research,School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China [2]Fuzhou Medical College of Nanchang University,Fuzhou 344000,China [3]College of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot 010021,China

出　　处：《Tungsten》2023年第1期118-129,共12页钨科技（英文）

基　　金：the Inner Mongolia Talent Fund;the National Natural Science Foundation of China (51603092);the China Postdoctoral Science Foundation (2019T120393);Natural Science Foundation of Jiangsu Province (BK20160537)。

摘　　要：In this paper,a series of partially sulfurized iron-cobalt oxide(FCOS) nanoparticles were embedded in carbon nanofibers(FCOS@CNF) via a simple electrospinning method and followed by a hydrothermal sulfurization process.The sulfurization degree of iron-cobalt oxide nanoparticles can be further controlled by tuning the hydrothermal reaction time.The self-supported FCOS@CNF samples with hierarchical nanostructure can not only effectively prevent the detaching of the FCOS nanoparticles but also provide abundant electrochemical active sites.When used as a supercapacitor electrode,the FCOS@CNF^(-1)0 electrode presents a high specific capacitance(1039 F·g^(-1)at 1 A·g^(-1)),a good rate performance(over 69.4%of capacitance retention from 1 to 15 A·g^(-1)),and a long cycle lifespan(88.3% of capacitance retention after 4000 cycles at10 A·g^(-1)).A unique(FCOS@CNF^(-1)0//F-RGO) asymmetric supercapacitor device was assembled using the FCOS@CNF^(-1)0 sample as the positive electrode and the freeze-dried reductive graphene oxide(F-RGO) as the negative electrode.The hybrid device exhibits excellent electrochemical properties,including a high specific capacity,a long cycle life(86% after5000 cycles at 10 A·g^(-1)),and a maximum energy density of 24.2 Wh·kg^(-1)@725.4 W·kg^(-1).

关 键 词：ELECTROSPINNING Carbon nanofibers Transition metal sulfur oxide SUPERCAPACITORS 

分 类 号：TM53[电气工程—电器]