Activated carbon derived from biomass is an environmentally friendly and low-cost supercapacitor electrode material.The diverse morphology and pore shape of activated carbon have a significant impact on enhancing the ...Activated carbon derived from biomass is an environmentally friendly and low-cost supercapacitor electrode material.The diverse morphology and pore shape of activated carbon have a significant impact on enhancing the storage capacity of supercapacitors.However,the disparate distribution of pore sizes in activated carbon has a negative effect on energy density.In the present study,the synthesis and modification of the carbon pore structure of Manihot esculenta tuber and Bambusa blumeana stem was carried out using a sonochemical-assisted hydrothermal method with various chemicals(0.06 M KOH,0.06 M PVP,0.06 M ZnCl_(2)).The 3D pore structure of the sample modified with 0.06 M ZnCl_(2)exhibited a well-defined microporous architecture and a substantial specific surface area of 516.29 m^(2)g^(-1),leading to excellent electrochemical performance in coin cell supercapacitors.A high power density of 1086.12 Wkg^(-1)at a voltage window of 2 V has been attained,with a corresponding current density of 0.3 Ag^(-1).Remarkably,after 5000 charge and discharge cycles,the capacitance retention was maintained at 90.8%.The high power density produced from biomass activated carbon based on Manihot esculenta tuber and Bambusa blumeana stem modified using 0.06 M ZnCl_(2)provides a practical approach for environmentally friendly electrical energy storage devices and realizes rapid mass transportation.展开更多
基金funded by the national competitive grant of Riset Kolaborasi Indonesia 2023 from the Ministry of Higher Education,Research and Technology with a specific grant by Universitas Negeri Malang,Indonesia.
文摘Activated carbon derived from biomass is an environmentally friendly and low-cost supercapacitor electrode material.The diverse morphology and pore shape of activated carbon have a significant impact on enhancing the storage capacity of supercapacitors.However,the disparate distribution of pore sizes in activated carbon has a negative effect on energy density.In the present study,the synthesis and modification of the carbon pore structure of Manihot esculenta tuber and Bambusa blumeana stem was carried out using a sonochemical-assisted hydrothermal method with various chemicals(0.06 M KOH,0.06 M PVP,0.06 M ZnCl_(2)).The 3D pore structure of the sample modified with 0.06 M ZnCl_(2)exhibited a well-defined microporous architecture and a substantial specific surface area of 516.29 m^(2)g^(-1),leading to excellent electrochemical performance in coin cell supercapacitors.A high power density of 1086.12 Wkg^(-1)at a voltage window of 2 V has been attained,with a corresponding current density of 0.3 Ag^(-1).Remarkably,after 5000 charge and discharge cycles,the capacitance retention was maintained at 90.8%.The high power density produced from biomass activated carbon based on Manihot esculenta tuber and Bambusa blumeana stem modified using 0.06 M ZnCl_(2)provides a practical approach for environmentally friendly electrical energy storage devices and realizes rapid mass transportation.
