Unveiling the redox electrochemistry of 1D,urchin-like vanadium sulfide electrodes for high-performance hybrid supercapacitors  

作　　者：K.Karuppasamy Dhanasekaran Vikraman Sajjad Hussain Balamurugan Thirumalraj P.Santhoshkumar Hemalatha Parangusan Hyun-Chang Park Jongwan Jung Hyun-Seok Kim 

机构地区：[1]Division of Electronics and Electrical Engineering,Dongguk University-Seoul,Seoul 04620,Republic of Korea [2]Department of Nanotechnology and Advanced Materials Engineering,Sejong University,Seoul 05006,Republic of Korea [3]School of Materials Science&Engineering,Kookmin University,Seoul 02707,Republic of Korea [4]Millimeter-Wave Innovation Technology Research Center(MINT),Dongguk University-Seoul,Seoul 04620,Republic of Korea [5]Qatar University Young Scientist Center(QUYSC),Qatar University,P.O.Box 2713,Doha,Qatar

出　　处：《Journal of Energy Chemistry》2023年第4期569-580,共12页能源化学（英文版）

基　　金：supported by the Research Program of Dongguk University in 2022(No.S-2022-G0001-00016)。

摘　　要：Exploring novel versatile electrode materials with outstanding electrochemical performance is the key to the development of advanced energy conversion and storage devices.In this work,we aim to construct new-fangled one-dimensional(1D)quasi-layered patronite vanadium tetrasulfide(VS_(4))nanostructures by using different sulfur sources,namely thiourea,thioacetamide,and L-cysteine through an ethyleneaminetetraacetic-acid(EDTA)-mediated solvothermal process.The as-prepared VS4exhibits several unique morphologies such as urchin,fluffy nanoflower,and polyhedron with appropriate surface areas.Among the prepared nanostructures,the VS_(4)-1@NF nanostructure exhibited excellent electrochemical properties in 6 M KOH solution,and we explored its redox electrochemistry in detail.The asprepared VS_(4)-1@NF electrode exhibited battery-type redox characteristics with the highest capacity of280 C g^(-1)in a three-electrode assembly.Moreover,it offered a capacity of 123 F g^(-1)in a hybrid twoelectrode set-up at 1 A g^(-1)with the highest specific energy and specific power of 38.5 W h kg^(-1)and750 W kg^(-1),respectively.Furthermore,to ensure the practical applicability and real-world performance of the prepared hybrid AC@NF//VS_(4)-1@NF cell,we performed a cycling stability test with more than 5,000galvanostatic charge–discharge cycles at 2 A g^(-1),and the cell retained around 84.7%of its capacitance even after 5,000 cycles with a CE of 96.1%.

关 键 词：Patronite Redox electrochemistry Urchin VS_(4) 1D material MESOPOROUS 

分 类 号：TM53[电气工程—电器] TB383.1[一般工业技术—材料科学与工程]