In this work,a novel chalcopyrite(CuFeS_(2))platelet like open-pored micro-flower structured electrode material was synthesized via a one-step hydrothermal method and its electrochemical performance as an electrode ma...In this work,a novel chalcopyrite(CuFeS_(2))platelet like open-pored micro-flower structured electrode material was synthesized via a one-step hydrothermal method and its electrochemical performance as an electrode material for supercapacitors were investigated.First and foremost,the structural,morphological,vibrational,and chemical compositional characteristics of the as prepared CuFeS_(2)were investigated by X-ray diffraction(XRD),field emission scanning electron microscopy(FE-SEM)with elemental mapping,laser Raman spectroscopy,and X-ray photoelectron spectroscopy(XPS),respectively.Subsequently,the electrochemical properties of the CuFeS_(2)electrode were explored using cyclic voltammetry(CV),galvanostatic charge-discharge(CD),and electrochemical impedance spectroscopy(EIS)studies in 1 M LiOH electrolyte.Cyclic voltammetry and charge-discharge analysis reveal the pseudocapacitive nature of the CuFeS_(2)electrode by obtaining a maximum specific capacity of about 26.46 mA h g^(-1)(specific capacitance of about∼95.28 F g^(-1))at a scan rate of 5 mV s^(-1)with a cycling stability retention of 94.38%even after 2000 cycles at a discharge current rate of 5 mA.Furthermore,in view of practical application a symmetric supercapacitor device was fabricated using the CuFeS_(2)electrode which delivered a maximum specific capacitance of about 34.18 F g^(-1)at a current rate of 1 mA and a maximum energy density of about 4.74 W h kg^(-1)with excellent cycling stability.The acquired results confirmed that the CuFeS_(2)electrode could be a prospective and electrochemically active candidate for next generation supercapacitors.展开更多
基金supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(2017R1C1B2012700,2018R1A4A1025998,and 2019R1A2C3009747).
文摘In this work,a novel chalcopyrite(CuFeS_(2))platelet like open-pored micro-flower structured electrode material was synthesized via a one-step hydrothermal method and its electrochemical performance as an electrode material for supercapacitors were investigated.First and foremost,the structural,morphological,vibrational,and chemical compositional characteristics of the as prepared CuFeS_(2)were investigated by X-ray diffraction(XRD),field emission scanning electron microscopy(FE-SEM)with elemental mapping,laser Raman spectroscopy,and X-ray photoelectron spectroscopy(XPS),respectively.Subsequently,the electrochemical properties of the CuFeS_(2)electrode were explored using cyclic voltammetry(CV),galvanostatic charge-discharge(CD),and electrochemical impedance spectroscopy(EIS)studies in 1 M LiOH electrolyte.Cyclic voltammetry and charge-discharge analysis reveal the pseudocapacitive nature of the CuFeS_(2)electrode by obtaining a maximum specific capacity of about 26.46 mA h g^(-1)(specific capacitance of about∼95.28 F g^(-1))at a scan rate of 5 mV s^(-1)with a cycling stability retention of 94.38%even after 2000 cycles at a discharge current rate of 5 mA.Furthermore,in view of practical application a symmetric supercapacitor device was fabricated using the CuFeS_(2)electrode which delivered a maximum specific capacitance of about 34.18 F g^(-1)at a current rate of 1 mA and a maximum energy density of about 4.74 W h kg^(-1)with excellent cycling stability.The acquired results confirmed that the CuFeS_(2)electrode could be a prospective and electrochemically active candidate for next generation supercapacitors.
