Multi-metal hydroxides possess unique physical and chemical properties,making them promising candidates for supercapacitor working electrodes.Enhancing their electrochemical performance can be achieved through a combi...Multi-metal hydroxides possess unique physical and chemical properties,making them promising candidates for supercapacitor working electrodes.Enhancing their electrochemical performance can be achieved through a combination with carbon materials.In this study,we synthesized a composite material by hydrothermally dispersed 4,6,and 10 wt%carbon nanotubes(CNT)into ternary cobaltbismuth-samarium hydroxide(CoBiSm-TOH).These nanocomposites were employed as the material for the working electrode in a supercapacitor.The findings reveal that at 1.5 A/g,the specific capacitance of CNT3@CoBiSm-TOH,using a three-electrode system,was found to be 852.91 F/g,higher than that of CoBi-BOH,CoBiSm-TOH,CNT1@CoBiSm-TOH and CNT5@CoBiSm-TOH-measuring 699.69,750.34,789.54 and 817.79 F/g,respectively.Moreover,CNT3@CoBiSm-TOH electrodes exhibited a capacitance retention of around 88%over 10,000 cycles.To demonstrate practical applicability,CNT3@CoBiSm-TOH was grown on woven carbon fiber(WCF),and a solid-state supercapacitor device was developed using the VARTM(vacuum-assisted resin transfer molding).This device displayed a specific capacitance of 272.67 F/g at 2.25 A/g.Notably,it achieved a maximum energy density of 53.01 Wh/kg at a power density of 750 W/kg and sustained excellent cycle stability over 50,000 cycles,maintaining 70%of its initial capacitance.These results underscore the importance of interfacial nanoengineering and provide crucial insights for the development of future energy storage devices.展开更多
Herein,we reported a facile,cost efficient,synthesis of Gr@NiCu NCs nanocomposite and explored their application in supercapacitor and antibacterial applications.The Graphene sheets in the NiCu based electrode showed ...Herein,we reported a facile,cost efficient,synthesis of Gr@NiCu NCs nanocomposite and explored their application in supercapacitor and antibacterial applications.The Graphene sheets in the NiCu based electrode showed a high specific surface area and supports conductive networks decorated with oxygen groups,which synergistically improve charge storage capability.Furthermore,Gr@NiCu NCs contain hydrophilic oxygen groups of chemically reduced graphene oxide,which allows easy access of the electrolyte to the electrode’s pores.An electrochemical study demonstrated the highest specific capacitance of 977 Fg^(-1) at 10 Ag^(-1) and remarkable cyclic retentiveness~90%even after 1000 cycles.A noteworthy energy density of the Gr@NiCu NCs achieves approximately 542 KWh kg^(-1) and a power density of 21 kW kg^(-1) acquired through the CD description utilizing a current density of 10 Ag^(-1).The antimicrobial activity of synthesized Gr@NiCu NCs was performed against S.Aureus,E.coli,and MRSA ATCC BAA 1708,P.Aeroginosa(ATCC 27853),S.Mutans(MTCC SM 497)strains compared with ampicillin antibiotic drug.This potent antibacterial activity is attributable to the synergistic apoptosis from Cu2þand bacter.展开更多
基金financially supported by 2024 Gyeongbuk Green Environment Support Center。
文摘Multi-metal hydroxides possess unique physical and chemical properties,making them promising candidates for supercapacitor working electrodes.Enhancing their electrochemical performance can be achieved through a combination with carbon materials.In this study,we synthesized a composite material by hydrothermally dispersed 4,6,and 10 wt%carbon nanotubes(CNT)into ternary cobaltbismuth-samarium hydroxide(CoBiSm-TOH).These nanocomposites were employed as the material for the working electrode in a supercapacitor.The findings reveal that at 1.5 A/g,the specific capacitance of CNT3@CoBiSm-TOH,using a three-electrode system,was found to be 852.91 F/g,higher than that of CoBi-BOH,CoBiSm-TOH,CNT1@CoBiSm-TOH and CNT5@CoBiSm-TOH-measuring 699.69,750.34,789.54 and 817.79 F/g,respectively.Moreover,CNT3@CoBiSm-TOH electrodes exhibited a capacitance retention of around 88%over 10,000 cycles.To demonstrate practical applicability,CNT3@CoBiSm-TOH was grown on woven carbon fiber(WCF),and a solid-state supercapacitor device was developed using the VARTM(vacuum-assisted resin transfer molding).This device displayed a specific capacitance of 272.67 F/g at 2.25 A/g.Notably,it achieved a maximum energy density of 53.01 Wh/kg at a power density of 750 W/kg and sustained excellent cycle stability over 50,000 cycles,maintaining 70%of its initial capacitance.These results underscore the importance of interfacial nanoengineering and provide crucial insights for the development of future energy storage devices.
文摘Herein,we reported a facile,cost efficient,synthesis of Gr@NiCu NCs nanocomposite and explored their application in supercapacitor and antibacterial applications.The Graphene sheets in the NiCu based electrode showed a high specific surface area and supports conductive networks decorated with oxygen groups,which synergistically improve charge storage capability.Furthermore,Gr@NiCu NCs contain hydrophilic oxygen groups of chemically reduced graphene oxide,which allows easy access of the electrolyte to the electrode’s pores.An electrochemical study demonstrated the highest specific capacitance of 977 Fg^(-1) at 10 Ag^(-1) and remarkable cyclic retentiveness~90%even after 1000 cycles.A noteworthy energy density of the Gr@NiCu NCs achieves approximately 542 KWh kg^(-1) and a power density of 21 kW kg^(-1) acquired through the CD description utilizing a current density of 10 Ag^(-1).The antimicrobial activity of synthesized Gr@NiCu NCs was performed against S.Aureus,E.coli,and MRSA ATCC BAA 1708,P.Aeroginosa(ATCC 27853),S.Mutans(MTCC SM 497)strains compared with ampicillin antibiotic drug.This potent antibacterial activity is attributable to the synergistic apoptosis from Cu2þand bacter.
