The preparation of liquefied bio-stalk carbon nanofibers and their application in supercapacitors

Jiang, Xia and Liu, Chao and Shi, Gaofeng and Wang, Guoying and Wang, Zhao and Jia, Shiming and Dong, Yucan and Mishra, Puranjan and Tian, Haoqi and Liu, Yanrong (2019) The preparation of liquefied bio-stalk carbon nanofibers and their application in supercapacitors. RSC Advances, 9. pp. 23324-23333. ISSN 2046-2069. (Published)

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Carbon nanofibers (CNFs) have been widely used in electrochemical energy storage devices because of their excellent conductivity, extremely large surface area and structural stability. Herein, we obtained a viscous, liquefied bio-stalk carbon via the simple chemical treatment of biomass, and mixed it with polyacrylonitrile to prepare a spinning solution. Subsequent electrospinning and high temperature activation resulted in the successful preparation of liquefied lignin-based activated carbon nanofibers. The as-prepared liquefied bio-stalk carbon nanofibers exhibited an outstanding electrochemical performance (specific capacitance of 273 F g−1 at 0.5 A g−1 current density), and a capacitance retention of 210 F g−1 even under a large current density of 10 A g−1. Besides its high specific capacitance and outstanding rate capability, the symmetrical supercapacitor cell based on the liquefied carbon-based nanofiber electrodes also exhibited an excellent cycling performance with 92.76% capacitance retention after 5000 charge–discharge cycles. This study provides a new strategy for the future development of supercapacitor electrode materials and enhances the development of biomass energy.

Item Type: Article
Uncontrolled Keywords: carbon nanofibers; energy storage devices; supercapacitors
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Engineering Technology
Depositing User: Noorul Farina Arifin
Date Deposited: 06 Aug 2019 06:40
Last Modified: 06 Aug 2019 06:40
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