Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/151657
Title: | Ultrafast-freezing-assisted mild preparation of biomass-derived, hierarchically porous, activated carbon aerogels for high-performance supercapacitors | Authors: | Zhang, Youfang Zhao, Chenyang Ong, Wee Kit Lu, Xuehong |
Keywords: | Engineering::Materials | Issue Date: | 2019 | Source: | Zhang, Y., Zhao, C., Ong, W. K. & Lu, X. (2019). Ultrafast-freezing-assisted mild preparation of biomass-derived, hierarchically porous, activated carbon aerogels for high-performance supercapacitors. ACS Sustainable Chemistry and Engineering, 7(1), 403-411. https://dx.doi.org/10.1021/acssuschemeng.8b03788 | Journal: | ACS Sustainable Chemistry and Engineering | Abstract: | Lignin-derived carbon aerogels (CAs) with hierarchically porous morphologies are facially prepared via ultrafast freezing of droplets of lignin/KOH solutions followed by freeze-drying and in situ activation during carbonization. The CAs exhibit a high specific surface area of 1681.6 m² g⁻¹ and abundant mesopores and macropores, which facilitate electrolyte absorption into the carbon framework, ion diffusion, and charge transport. Moreover, the CAs also possess abundant oxygenated groups, which provide additional Faradaic redox reactions. Thus, this mild process, which involves much less KOH, is effective in boosting the electrochemical performance of the CAs as supercapacitor electrodes. The optimized CA exhibits a high specific capacitance of 189 F g⁻¹ at 1 A g⁻¹, a high energy density of 26.25 Wh kg⁻¹ at a power density of 1000 W kg⁻¹, and capacitance retention of 97.4% after 10000 cycles. | URI: | https://hdl.handle.net/10356/151657 | ISSN: | 2168-0485 | DOI: | 10.1021/acssuschemeng.8b03788 | Schools: | School of Materials Science and Engineering | Rights: | © 2018 American Chemical Society. All rights reserved. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | MSE Journal Articles |
SCOPUSTM
Citations
10
53
Updated on Mar 24, 2024
Web of ScienceTM
Citations
10
45
Updated on Oct 26, 2023
Page view(s)
210
Updated on Mar 28, 2024
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.