煤气化细渣残炭的硝酸活化与电化学性能研究
Research on nitric acid activation and its electrochemical performance of residual carbon from coal gasification fine slag
韩宝宝 1刘锐 1辛国祥 1王耀 2高建民 2宋金玲1
作者信息
- 1. 内蒙古科技大学材料与冶金学院,内蒙古自治区包头市,014010
- 2. 内蒙古博大实地化学有限公司,内蒙古自治区鄂尔多斯市,017004
- 折叠
摘要
将煤气化细渣残炭(RC)制备的炭材料应用于电极的活性材料,不仅可以减少固废污染、降低电极材料的成本,酸处理还可以有效改变炭材料的物理结构和表面化学性质.采用HNO3活化RC,通过改变活化温度来调节RC的孔隙结构及表面官能团,探究其对活化材料电化学性能的影响.使用2 mol/L的HNO3作为活化剂、在温度为80 ℃活化2h后,可以得到活化材料(RCH-3)的电流密度为0.5 A/g,比电容达到104.0 F/g;在电流密度为2.0 A/g时,使用RCH-3作为活性材料的对称超级电容器经过1万次循环后,电容值保持在初始值的96.03％,可以显示出更好的循环稳定性,这源于RCH-3具有丰富的含氧官能团、较高的润湿性、较大的表面积和介孔比率.
Abstract
The application of carbon materials prepared by residual carbon(RC)from coal gasification fine slag as active materials for electrodes can not only reduce solid waste pollution and lower the cost of electrode materials,but also effectively change the physical structure and surface chemical properties of carbon materials through acid treatment.Using nitric acid(HNO3)to activate RC,adjusting the pore structure and surface functional groups of RC by changing the activation temperature,and its effect on the electrochemical performance of active materials was explored.When 2 mol/L HNO3 was used as an activator and activated at 80 ℃ for 2 hours,the current density of the active material(RCH-3)was 0.5 A/g,and the specific capacitance reached 104.0 F/g.At a current density of 2.0 A/g,the symmetrical supercapacitor using RCH-3 as the active material maintained a capacitance value of 96.03％of its initial value after 10 000 cycles,demonstrating better cycling stability.This was due to the rich oxygen-containing functional groups,high wettability,large surface area,and mesoporous ratio of RCH-3.
关键词
气化细渣/残炭/活化/电化学性能Key words
gasification fine slag/residual carbon/activation/electrochemical performance引用本文复制引用
基金项目
企业横向项目(BDSD1-JS-2021-021)
"科技兴蒙"行动重点专项子项目(2021EEDSCXSFQZD008)
内蒙古科技大学高校基本科研业务费(2023XKJX007)
内蒙古自治区高校创新科研团队计划(NMGIRT2215)
内蒙古科技重大专项(2020ZD17)
出版年
2024
NETL
NSTL
万方数据