纤维素科学与技术2025，Vol.33Issue(3)：1-8,8.DOI:10.16561/j.cnki.xws.2025.03.01
玉米秸秆衍生碳的制备及电化学性能研究
Preparation and Electrochemical Performance of Corn Stalk-derived Carbon
摘要
Abstract
This paper proposes a novel process for utilizing crop waste,specifically corn stalks,to prepare porous carbon materials for supercapacitor electrodes.The method involves pre-carbonization of corn stalks,followed by chemical activation using potassium hydroxide(KOH)at a ratio of 1∶3(activator to precursor)through impregnation and high-temperature treatment.The resulting activated carbon was comprehensively characterized in terms of structure and morphology using techniques such as scanning electron microscopy(SEM),N₂ adsorption-desorption analysis,X-ray diffraction(XRD),and Raman spectroscopy(Raman).The electrochemical performance of the activated carbon electrodes was investigated through cyclic voltammetry(CV),galvanostatic charge-discharge(GCD),and electrochemical impedance spectroscopy(EIS).The results indicate that the KOH-activated carbon material(HPC)exhibits a specific surface area of 1597.7 m2/g and a pore volume of 0.76 cm3/g.Compared to PC,HPC demonstrates superior electric double-layer capacitive behavior in CV curves,with GCD tests revealing a specific capacitance of 156.6 F/g.This study particularly emphasizes the pre-carbonization process prior to KOH chemical activation.Pre-carbonization was conducted at varying temperatures(250～650℃),followed by KOH impregnation and activation at 800℃.Electrochemical tests show that among these samples,the carbon material pre-treated at 450℃exhibits the best electrochemical performance,achieving the highest specific capacitance in the group.The derived carbon serves as a sustainable and efficient material for supercapacitor electrodes,offering valuable insights for the design of eco-friendly energy storage systems.关键词
玉米秸秆/KOH/活化/超级电容器/预碳化Key words
corn stalks/KOH/activation/supercapacitor/pre-carbonization分类
能源科技引用本文复制引用
任夏瑾,张兴华,马隆龙..玉米秸秆衍生碳的制备及电化学性能研究[J].纤维素科学与技术,2025,33(3):1-8,8.基金项目
国家自然科学基金重点项目(52236010). （52236010）
