期刊
CHINESE CHEMICAL LETTERS
卷 32, 期 4, 页码 1485-1490出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.08.041
关键词
ZIF-8; Mesoporous carbon; Na2SiO3; Activation; Supercapacitors
资金
- National Natural Science Foundation of China [21676070]
- Hebei Province Introduction of Foreign Intelligence Projects (2018)
- Beijing National Laboratory for Molecular Sciences, Hebei Science and Technology Project [20544401D, 20314401D]
- Tianjin Science and Technology Project [19YFSLQY00070]
- CAS Key Laboratory of Carbon Materials [KLCMKFJJ2007]
- Hebei Province 2020 Central Leading Local Science and Technology Development Fund Project [206Z4406G]
In this study, MOF-derived mesoporous carbon was prepared using ZIF-8 and Na2SiO3, showing excellent electrochemical performance and providing a new direction for large-scale applications.
Metal organic frameworks (MOFs) derived carbonaceous materials have a wide range of applications in the fields of energy storage, catalysis, adsorption and separation, etc. Especially, zeolitic imidazolate framework-8 (ZIF-8) is an excellent candidate to synthesize porous carbon due to the large surface area and high nitrogen content. However, the dominated microporous structure of ZIF-8-derived carbon significantly hinders ionic mass transfer, limiting the improvement of performance. Herein, MOF-derived mesoporous carbon was prepared using ZIF-8 as carbon precursor and cheap sodium silicate (Na2SiO3) as activator. The introduction of Na2SiO3 created rich mesoporous structure and increased specific surface area, as well as the effects of pyrolysis temperature and Na2SiO3 dosage on performance was also investigated. The obtained ZIF-derived porous carbon exhibits good electrochemical performance with specific capacitance of 263 F/g at 1 A/g and excellent cycle life (96.07% after 10,000 GCD cycles) in supercapacitor. The use of cheap Na2SiO3 activator provides a new orientation for the preparation of MOF-derived carbons with rich pores, high surface area, and facilitates the large-scale application of MOF-derived carbons. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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