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Controlling the graphite-like microcrystalline structure of lignin-based ultrafine carbon fibers via the design of condensed structures.

Authors :
Feng Z
Bai J
Zhang J
Qi X
Li N
Song C
Sun Y
Tang J
Wang S
Source :
International journal of biological macromolecules [Int J Biol Macromol] 2024 Jun; Vol. 270 (Pt 2), pp. 132191. Date of Electronic Publication: 2024 May 09.
Publication Year :
2024

Abstract

Obtaining lignin-based graphite-like microcrystallites at a relatively low carbonization temperature is still very challenging. In this work, we report a new method based on condensed structures, for regulating graphite-like microcrystalline structures via the incorporation of 4,4'-diphenylmethane diisocyanate (MDI) into the main structure of lignin. The effects of MDI on the thermal properties of lignin and the graphite-like microcrystalline structure of lignin-based ultrafine carbon fibers were extensively studied and investigated. The incorporation of MDI decreased the thermal stability of lignin, increased the carbon yield and enhanced the formation of graphite-like microcrystallites, which are beneficial for reducing energy consumption during the preparation of lignin-based carbon fibers. The modified lignin-based ultrafine carbon fibers (M-LCFs) demonstrated satisfactory electrochemical performance, including high specific capacitance, low charge transfer resistance, and good cycle performance. The M-LCFs-3/2 electrode had a specific capacitance of 241.3 F g <superscript>-1</superscript> at a current density of 0.5 A g <superscript>-1</superscript> , and a residual ratio of 90.2 % after 2000 charge and discharge cycles. This study provides a new approach to control the graphite-like microcrystalline structure and electrochemical performance while also optimizing the temperature.<br />Competing Interests: Declaration of competing interest I would like to declare on behalf of my co-authors that we have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2024 Elsevier B.V. All rights reserved.)

Details

Language :
English
ISSN :
1879-0003
Volume :
270
Issue :
Pt 2
Database :
MEDLINE
Journal :
International journal of biological macromolecules
Publication Type :
Academic Journal
Accession number :
38729466
Full Text :
https://doi.org/10.1016/j.ijbiomac.2024.132191