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

Title
Urea-assisted template-less synthesis of heavily nitrogen-doped hollow carbon fibers for the anode material of lithium-ion batteries
Author
방진호
Keywords
HIGH-CAPACITY; THERMAL-DECOMPOSITION; PERFORMANCE; NANOTUBES; GRAPHENE; ENERGY; ELECTRODES; CARBONIZATION; NANOFIBERS; CONVERSION
Issue Date
2019-03
Publisher
ROYAL SOC CHEMISTRY
Citation
NEW JOURNAL OF CHEMISTRY, v. 43, NO 9, Page. 3821-3828
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.
URI
https://pubs.rsc.org/en/content/articlelanding/2019/NJ/C8NJ05807E#!divAbstracthttps://repository.hanyang.ac.kr/handle/20.500.11754/109986
ISSN
1144-0546; 1369-9261
DOI
10.1039/c8nj05807e
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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