LAPSE:2019.0873
Published Article
LAPSE:2019.0873
Highly Porous Graphitic Activated Carbons from Lignite via Microwave Pretreatment and Iron-Catalyzed Graphitization at Low-Temperature for Supercapacitor Electrode Materials
Dongdong Liu, Xiaoman Zhao, Rui Su, Zhengkai Hao, Boyin Jia, Song Li, Liangjie Dong
July 31, 2019
At present, the preparation of highly porous graphitic activated carbons (HPGACs) using the usual physical and chemical activation methods has met a bottleneck. In this study, HPGACs are directly synthesized from lignite at 900 °C. The whole process is completed by a microwave pretreatment, a graphitization conversion of the carbon framework at a low temperature using a small amount of FeCl3 (10−30 wt%), and a subsequent physical activation using CO2. Consequently, the dispersed and mobile iron species, in the absence of oxygen functional groups (removed during the microwave pretreatment), can greatly promote catalytic graphitization during pyrolysis, and, as an activating catalyst, can further facilitate the porosity development during activation. The as-obtained AC-2FeHLH-5-41.4(H) presents a low defect density, high purity, and specific surface area of 1852.43 m2 g−1, which is far greater than the AC-HLH-5-55.6(H) obtained solely by physical activation. AC-2FeHLH-5-41.4(H) as a supercapacitor electrode presents an excellent performance in the further electrochemical measurements. Such a convenient and practical method with low cost proves a scalable method to prepare HPGACs from a wide range of coal/biomass materials for industrial scale-up and applications.
Keywords
activated carbons, graphitization, high porosity, supercapacitor material
Suggested Citation
Liu D, Zhao X, Su R, Hao Z, Jia B, Li S, Dong L. Highly Porous Graphitic Activated Carbons from Lignite via Microwave Pretreatment and Iron-Catalyzed Graphitization at Low-Temperature for Supercapacitor Electrode Materials. (2019). LAPSE:2019.0873
Author Affiliations
Liu D: College of Engineering and Technology, Jilin Agricultural University, Changchun 130118, China [ORCID]
Zhao X: College of Engineering and Technology, Jilin Agricultural University, Changchun 130118, China
Su R: College of Engineering and Technology, Jilin Agricultural University, Changchun 130118, China
Hao Z: College of Engineering and Technology, Jilin Agricultural University, Changchun 130118, China
Jia B: College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
Li S: College of Engineering and Technology, Jilin Agricultural University, Changchun 130118, China
Dong L: College of Engineering and Technology, Jilin Agricultural University, Changchun 130118, China
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Journal Name
Processes
Volume
7
Issue
5
Article Number
E300
Year
2019
Publication Date
2019-05-21
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7050300, Publication Type: Journal Article
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LAPSE:2019.0873
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doi:10.3390/pr7050300
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Jul 31, 2019
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Calvin Tsay
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