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

doi:10.19964/j.issn.1006-4990.2021-0383

无机盐工业 ›› 2022, Vol. 54 ›› Issue (4): 159-164.doi: 10.19964/j.issn.1006-4990.2021-0383

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

张天亮¹(),李军¹(),熊巍²,张海燕²,陶晓秋²

1.四川大学化学工程学院,四川成都 610065
2.四川省烟草质量监督检测站

收稿日期:2021-06-18 出版日期:2022-04-10 发布日期:2022-04-18
作者简介:张天亮（1994— ）,男,硕士,主要从事废弃物资源化利用研究;E-mail： zz940601@gmail.com。
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

Zhang Tianliang¹(),Li Jun¹(),Xiong Wei²,Zhang Haiyan²,Tao Xiaoqiu²

1. Sichuan University,School of Chemical Engineering,Chengdu 610065,China
2. Sichuan Tobacco Quality Supervision and Testing Station

Received:2021-06-18 Published:2022-04-10 Online:2022-04-18

摘要/Abstract

摘要：

以废弃烟叶为碳源、碳酸钾为活化剂一步法制得烟草基多孔碳。采用扫描电子显微镜（SEM）、X射线衍射（XRD）、N₂吸附-脱附分析（BET）和拉曼光谱（Raman）等手段对多孔材料进行表征。结果表明,材料表面含有醚基、羧基等杂原子基团,具有丰富的孔道结构,比表面积高达2 058 m²/g。三电极体系中的电化学性能结果表明,当碳酸钾与废弃烟叶质量比为3∶1时具有最佳储电性能,其在1 A/g电流下比容量可达337 F/g;10 A/g时循环充放电2 000次,材料的容量保持率为97.3%,具有良好的倍率性能和循环稳定性。

关键词: 废弃烟叶, K₂CO₃, 多孔碳, 超级电容器

Abstract:

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

中图分类号:

TQ131.13

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.

Zhang Tianliang,Li Jun,Xiong Wei,Zhang Haiyan,Tao Xiaoqiu. Study on one-step preparation of activated carbon with high specific surface by K₂CO₃ activation and its capacitance performance[J]. Inorganic Chemicals Industry, 2022, 54(4): 159-164.

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样品	S_BET/ （m²·g^-1）	V_total/ （cm³·g^-1）	V_micro/ （cm³·g^-1）	V_meso/ （cm³·g^-1）	平均孔径/nm
YC-0	125.176 2	0.168 74	0.056 006	0.121 203	2.70
YC-3	2 058.421 4	1.203 89	0.865 176	0.362 665	1.17

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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

Study on one-step preparation of activated carbon with high specific surface by K₂CO₃ activation and its capacitance performance

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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

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Study on one-step preparation of activated carbon with high specific surface by K₂CO₃ activation and its capacitance performance