Citation: Qiqi Li, Su Zhang, Yuting Jiang, Linna Zhu, Nannan Guo, Jing Zhang, Yutong Li, Tong Wei, Zhuangjun Fan. 前驱体机械压实制备高密度活性炭及其致密电容储能性能[J]. Acta Physico-Chimica Sinica, ;2025, 41(3): 240600. doi: 10.3866/PKU.WHXB202406009 shu

前驱体机械压实制备高密度活性炭及其致密电容储能性能

Qiqi Li ¹ ,
Su Zhang ¹ ,
Yuting Jiang ² ,
Linna Zhu ³ ,
Nannan Guo ³ ,
Jing Zhang ¹ ,
Yutong Li ¹ ,
Tong Wei ^1,4 ,
Zhuangjun Fan ^1,4

1.
School of Material Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong Province, China;
2.
School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning Province, China;
3.
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China;
4.
Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, China

Received Date: 11 June 2024
Revised Date: 29 July 2024
Accepted Date: 30 July 2024

Fund Project: The project was supported by the National Natural Science Foundation of China (52062046, 52302336), the Taishan Scholar Project of Shandong Province (tsqn202306131, tsqn202312123), and the Key Basic Research Projects of Natural Science Foundation of Shandong Province (ZR2019ZD51).

大比表面积活性炭的密度普遍较低、体积储能性能不佳，难以满足超级电容器的小型化发展需求。针对此，本工作提出在活化前对炭前驱体进行机械压实以提高活性炭密度的普适性方法，并研究了机械压实对由外而内活化(炭粉/KOH混合物)和均匀离子活化(热解含钾盐类)所制备活性炭的比表面积、孔结构和电容储能性能的影响规律。结果表明，对前驱体进行机械压实能够提高活化反应效率、活性炭密度和体积电容储能性能。随着机械压力升高，由外而内活化所得活性炭的比表面积和孔隙率先升高后降低，原因在于机械压实能够消除颗粒间的空隙以增加前驱体与活化剂之间的接触，进而显著提高了活化效率。对于均匀离子活化，活性炭的比表面积和孔隙率呈现先降低后升高的趋势，这可能是由于致密前驱体抑制了热解过程中产生的活性气体分子(H₂O、CO₂等)快速散逸，使之继续参与活化反应，提高了活化刻蚀效率。本工作为大比表面积和高密度活性炭的设计制备提供了简单思路。
- Activated carbon,
- Mechanical compression,
- Activation,
- Supercapacitor,
- Volumetric capacitance
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