化工矿物与加工2025，Vol.54Issue(3)：27-37,11.DOI:10.16283/j.cnki.hgkwyjg.2025.03.004
基于生焦粉的多孔炭电极材料制备及其超级电容器性能研究
Preparation of nano-carbon electrode material based on raw coke powder and its supercapacitor performance
摘要
Abstract
Supercapacitors have attracted much attention due to their efficient energy storage characteristics,and electrode materials are the core components.Porous carbon materials have the advantages of high specific surface area,suitable pore structure,easy access and low cost,and are common electrode choices.In this paper,porous carbon electrode materials were prepared by synergistic coupling of KCl and KOH with raw coke powder as raw material.The effects of different constant temperature time on the electrochemical properties of porous carbon electrode materials at the final temperature of 800℃were investigated.The structure of the materials was characterized by X-ray diffraction(XRD),Raman spectroscopy(Raman),specific surface area analyzer(BET)and scanning electron microscopy(SEM)and other methods.The electrochemical properties of the materials were tested by constant current charge and discharge,cyclic voltammetry,AC impedance and other methods.The results show that when the constant tempera-ture time is 3 h,the prepared porous carbon electrode material has the highest specific surface area,reaching 1 454.19 m2/g.Under the condition of three electrodes,the internal resistance of the electrode material is only 0.62 Ω,and a certain mesoporous distribution provides a smoother channel for the transmission of the electrolyte,ensuring a smaller relaxation time(4.17 s);when the current density is 10 A/g,the mass to capacitance ratio of the electrode material is still as high as 212.0 F/g,and the capacity retention rate is 80.0%.The symmetrical supercapacitor was assembled and its performance was tested.The results show that the maximum mass specific capacitance is 61.8 F/g at a current density of 0.5 A/g.When the power density is 249.96 W/kg,the energy density is 8.6 Wh/kg.After 5 000 charge-discharge cycles,the coulombic efficiency is almost unchanged.关键词
超级电容器/生焦粉/电极材料/协同效应/质量比电容/弛豫时间/倍率性能Key words
supercapacitor/raw coke powder/electrode materials/synergistic effect/mass specific capacitance/relaxation time/rate capability分类
化学化工引用本文复制引用
朱万兵,郭金梅,张海玲,文锡量,程俊霞,朱亚明..基于生焦粉的多孔炭电极材料制备及其超级电容器性能研究[J].化工矿物与加工,2025,54(3):27-37,11.基金项目
国家自然科学基金项目(22208138) （22208138）
辽宁省科技厅项目(2021-BS-245,2021-MS-306) （2021-BS-245,2021-MS-306）
辽宁省高校基本科研业务费专项资金资助项目(重油改性) （重油改性）
辽宁科技大学优秀人才培养项目(2021YQ06) （2021YQ06）
辽宁科技大学大学生创新创业项目(2024- （）
