煤焦油沥青不同组分基多孔炭的制备及电化学性能研究  

Preparation of porous carbons derived from the various fractions of coal tar pitch and their electrochemical properties

作　　者：杨晓霞[1,2,3] 孙国笑 刘倩 池洋 杨晨晨 张壮壮 付峰 池汝安[2] YANG Xiaoxia;SUN Guoxiao;LIU Qian;CHI Yang;YANG Chenchen;ZHANG Zhuangzhuang;FU Feng;CHI Ru’an(School of Chemistry and Chemical Engineering,Yan’an University,Yan’an 716000;Xingfa School of Mining Engineering,Wuhan Institute of Technology,Wuhan 430073;Research Institute of Comprehensive Energy Industry Technology,Yan’an 716000,China)

机构地区：[1]延安大学化学与化工学院,陕西延安716000 [2]武汉工程大学兴发矿业学院,湖北武汉430073 [3]延能-延大综合能源产业技术研究院,陕西延安716000

出　　处：《延安大学学报（自然科学版）》2023年第3期1-6,共6页Journal of Yan'an University：Natural Science Edition

基　　金：陕西省技术创新引导专项(2022QFY07-01);校级大学生创新创业训练计划项目(D2021021)。

摘　　要：为了探讨煤焦油沥青中不同组分对多孔炭结构与性能的影响,采用溶剂萃取分离的方法将煤焦油沥青分离成5个不同组分,分别以5个组分为原料,通过KOH活化法制备了多孔炭,研究了不同原料组成对多孔炭形貌、结构以及电化学性能的影响。研究表明,随着原料组成的重质化,所制备的多孔炭的孔隙度下降,致密度增加,比电容降低,充放电速率下降。其中轻组分(TS)最有利于发展孔隙结构,以此为原料制备的多孔炭TS-PC的比表面积和孔体积最大,分别达2482 m~2·g^(-1)和1.781 m~3·g^(-1)。同时,5个样品中TS-PC的比电容最大,在三电极6 mol·L^(-1)KOH体系中,TS-PC的比电容为395 F·g^(-1)(0.5 A·g^(-1));当电流密度增加至50 A·g^(-1)时,比电容仍达220 F·g^(-1),电容持有率为55.7%。In order to study the effects of different components contained in coal tar pitch on the structure and properties of porous carbons,the coal tar pitch was separated into five different fractions by solvent extraction,which were used as the raw materials to prepare porous carbons via KOH activation.The effects of different fractions on the morphology,structure,and electrochemical performance of porous carbons were investigated.It was indicated that the porosity of the porous carbon decreased while the densification increased as the fractions changed from light fraction to heavy one,and the specific capacitance and the charging and discharging rate decreasd.Among them,the light fraction(TS)was most favorable for the development of pore structure,and the specific surface area and pore volume of the as-prepared porous carbon TS-PC were higher than those of others,2482 m~2·g~(-1)and 1.781 m3·g~(-1),respectively.At the same time,the specific capacitance of TS-PC was the best among the five samples,reached 395 F·g-1 at 0.5 A·g~(-1)in 6 mol·L~(-1)KOH electrolyte in the three-electrode system,and still remained 220 F·g~(-1)at 50 A·g~(-1),with a capacitance retention of 55.7%.

关 键 词：煤焦油沥青 组分分离 多孔炭 电化学性能 

分 类 号：TQ530[化学工程—煤化学工程]