摘要
以废弃榴莲壳为生物质碳源,通过简便的炭化-活化工艺制备了多孔榴莲壳活性炭(DCK-x),并通过SEM、TEM、N2吸附-脱附、XRD、Raman、XPS等测试手段系统研究了其结构对电化学性能的影响。研究结果表明:当榴莲壳炭(DC)前驱体与KOH活化剂质量比为1∶3时,所得产物DCK-3具有丰富的介孔和微孔,其比表面积高达1724 m^(2)/g,且具备理想的石墨化程度,表面含有O—C=O、C=O/N—C—O和C—O等含氧基团。作为电极材料,DCK-3在0.5 A/g电流密度下展现出276.3 F/g的优异比电容。将其组装成DCK-3∥DCK-3对称型超级电容器,在1 A/g电流密度下,其比电容为81.25 F/g,对应的能量密度和功率密度分别为11.28 W·h/kg和625 W/kg。该器件在10 A/g大电流密度下表现出卓越的循环稳定性,经历10000次充放电循环后,电容保持率仍高达94.6%。
This study utilized the discarded durian shells as a biomass carbon source to prepare porous durian shell activated carbon(DCK-x)through a facile carbonization-activation process.The influence of the structure distribution on electrochemical performance was systematically investigated using SEM,TEM,N2 adsorption-desorption,XRD,Raman,and XPS.Results demonstrated that when the mass ratio of durian shell carbon(DC)precursor to KOH activator was 1∶3,the resulting product DCK-3 had abundant mesoporous and microporous properties,featuring a high specific surface area of 1724 m^(2)/g.It had an ideal degree of graphitization and its surface contained O—CO,CO/N—C—O,and C—O oxygen-containing functional groups.As a supercapacitor electrode material,DCK-3 delivered an outstanding specific capacitance of 276.3 F/g at a current density of 0.5 A/g.The assembled DCK-3∥DCK-3 symmetric supercapacitor achieved a specific capacitance of 81.25 F/g at 1 A/g,corresponding to energy and power densities of 11.28 W·h/kg and 625 W/kg,respectively.Notably,the device demonstrated exceptional cycling stability at a high current density of 10 A/g,retaining 94.6%of its initial capacitance after 10000 charge-discharge cycles.
作者
张芯禹
陈旭
徐文彪
时君友
李翔宇
ZHANG Xinyu;CHEN Xu;XU Wenbiao;SHI Junyou;LI Xiangyu(Jilin Key Laboratory of Wooden Material Science and Engineering,Beihua University,Jilin 132013,China)
出处
《林产化学与工业》
北大核心
2025年第5期118-126,共9页
Chemistry and Industry of Forest Products
基金
吉林省科学技术发展计划项目(20250202030NC)。
关键词
超级电容器
榴莲壳炭材料
氢氧化钾
活化
电极材料
supercapacitor
durian shell carbon material
potassium hydroxide
activation
electrode materia material
