碳酸钾活化一步法制备高比表活性炭及其电容性能的研究
收稿日期: 2021-06-18
网络出版日期: 2022-04-18
基金资助
中国烟草总公司四川省公司科技计划项目(SCYC201918)
Study on one-step preparation of activated carbon with high specific surface by K2CO3 activation and its capacitance performance
Received date: 2021-06-18
Online published: 2022-04-18
张天亮 , 李军 , 熊巍 , 张海燕 , 陶晓秋 . 碳酸钾活化一步法制备高比表活性炭及其电容性能的研究[J]. 无机盐工业, 2022 , 54(4) : 159 -164 . DOI: 10.19964/j.issn.1006-4990.2021-0383
Waste tobacco was used as the carbon source to prepare tobacco-based porous carbon in one step with K2CO3 as the activator.Scanning electron microscope（SEM）,X-ray diffraction（XRD）,N2 adsorption-desorption analysis（BET）,Raman spectroscopy（Raman） and other methods were applied to characterize the porous material.The results showed that the surface of the material contained heteroatom groups such as ether groups and carboxyl groups,and it had a rich pore structure with a specific surface area of up to 2 058 m2/g.The electrochemical performance results in the three-electrode system showed that when the mass ratio of K2CO3 to waste tobacco was 3∶1,it had the best electrical storage performance,and its specific capacitance could reach 337 F/g at 1 A/g.It could be charged and discharged for 2 000 times at 10 A/g.The capacitance still retained 97.3% of the initial capacitance,with good rate performance and cycle stability.
Key words： waste tobacco; K2CO3; porous carbon; supercapacitor
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