Mixed-phase composites derived from cobalt terephthalate as efficient battery-type electrodes for high-performance supercapattery  

作　　者：Ramu Manikandan Antonysamy Dennyson Savariraj Goli Nagaraju A.M.Kale J.Puigdollers Hyejin Park Hyun-Soo Kim Jae-Min Oh C.Justin Raj Byung Chul Kim 

机构地区：[1]Department of Energy and Materials Engineering,Dongguk University-Seoul,Seoul 04620,Republic of Korea [2]Advanced Functional Nanohybrid Material Laboratory,Department of Chemistry,Dongguk University Seoul-Campus,Jung-gu,Seoul,04620,Republic of Korea [3]Department of Materials,Imperial College London,London SW72AZ,United Kingdom [4]Department of Advanced Components and Materials Engineering,Sunchon National University,255,Jungang-ro,Suncheon-si,Jellanamdo,57922,Republic of Korea [5]Department of Enginyeria Electrònica,Universitat Politècnica Catalunya,Barcelona 08034,Spain [6]Next Generation Battery Research Center,Korea Electrotechnology Research Institute(KERI),Changwon,51543,Republic of Korea [7]Physics Division,School of Advanced Sciences,Vellore Institute of Technology(VIT),Chennai Campus,Chennai,600127,Tamil Nadu,India

出　　处：《Journal of Materials Science & Technology》2023年第26期220-233,共14页材料科学技术（英文版）

基　　金：supported by Basic Science Research Pro-gram through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(No.NRF-2014R1A6A1030419);supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.2020112382).

摘　　要：Interfacial engineering of two-dimensional(2D)monometallic phosphides enables remarkable structural and electrochemical properties in energy storage devices.Herein,2D nanosheets(NSs)of FeP_(2)/Co_(2) P were grown on Ni-foam(FCP)using a solution-based and phosphorization approach to be used as freestanding for high-performance energy storage devices.An effective phosphorization strategy is successfully de-veloped to improve the overall crystalline phase,tailor the morphology,and boost the electrochemical performances of electrodes.The FCP NSs electrode exhibits a battery-type redox behavior with a maxi-mum high areal capacity of 1.96 C cm^(-2) at 4 mA cm^(-2) in 6 M KOH aqueous electrolyte compared to the other counterparts.The superior electrochemical performance was achieved by increasing the electroac-tive sites and high conductivity via surface tailoring and fast redox reactions.Moreover,a supercapattery was assembled utilizing FCP and activated carbon(AC)electrodes and it revealed maximum specific en-ergy(E_(s))and specific power(P_(s))of 41.2 Wh kg^(-1) and 7578 W kg^(-1) with good cycling stability of 91%after 10,000 cycles at 5 A g^(-1).Eventually,the supercapattery has been explored in practical applications by lighting up light-emitting diodes(LEDs),representing the real-time performance of superior energy storage devices.

关 键 词：2D nanosheet Monometallic phosphide Battery-type material Supercapattery Energy storage 

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