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Urea-assisted template-less synthesis of heavily nitrogen-doped hollow carbon fibers for the anode material of lithium-ion batteries

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Abstract

A unique decomposition pathway of urea involving gas evolution was exploited as a way to introduce voids and mesopores into one-dimensional carbon nanofibers. While the conventional carbonization of electrospun polyacrylonitrile (PAN) nanofibers produces microporous and solid carbon nanofibers, adding a simple step involving a urea coating over PAN prior to the carbonization drastically changes the porous structure of the resulting carbon nanofibers. Besides its role as a porogen for the creation of voids and mesopores, urea serves as an additional nitrogen source for the carbon nanofibers, and as a consequence, heavily nitrogen-doped carbon fibers are produced. Compared with conventional carbon nanofibers derived from the pyrolysis of electrospun PAN, hollow carbon nanofibers are superior in lithium-ion battery applications because of their larger specific surface area, higher nitrogen doping, and voids combined with mesopores that are beneficial for lithium-ion (de-)intercalation. Due to its versatility and simplicity, this urea-assisted template-less synthesis strategy paves a new way for the production of various porous carbon nanostructures.

Graphical abstract: Urea-assisted template-less synthesis of heavily nitrogen-doped hollow carbon fibers for the anode material of lithium-ion batteries

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Publication details

The article was received on 19 Nov 2018, accepted on 02 Feb 2019 and first published on 05 Feb 2019


Article type: Paper
DOI: 10.1039/C8NJ05807E
Citation: New J. Chem., 2019, Advance Article

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    Urea-assisted template-less synthesis of heavily nitrogen-doped hollow carbon fibers for the anode material of lithium-ion batteries

    J. Jang, H. Kim, S. Kang, J. H. Bang and C. S. Lee, New J. Chem., 2019, Advance Article , DOI: 10.1039/C8NJ05807E

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