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The identification of specific N-configuration responsible for Li-ion storage in N-doped porous carbon nanofibers: An ex-situ study

Title
The identification of specific N-configuration responsible for Li-ion storage in N-doped porous carbon nanofibers: An ex-situ study
Authors
Samdani, JitendraTran, Thanh NhanKang, Tong-HyunLee, Byong-JuneJang, Yun HeeYu, Jong-SungShanmugam, Sangaraju
DGIST Authors
Samdani, Jitendra; Tran, Thanh Nhan; Kang, Tong-Hyun; Lee, Byong-June; Jang, Yun HeeYu, Jong-SungShanmugam, Sangaraju
Issue Date
2021-01
Citation
Journal of Power Sources, 483, 229174
Type
Article
Article Type
Article
Author Keywords
N-doped porous carbon nanofibersN-configurationsPyridinic-NFree-standing electrodeLi-ion battery
Keywords
AnodesCarbon nanofibersCarbonizationDoping (additives)IonsLithium compoundsLithium metallographyPhotoelectron spectroscopyPorous materialsSolid electrolytesStorage (materials)X ray photoelectron spectroscopyAnode electrodesAtomic percentageLithium-ion batteriesLi ion storageN2 atmospheresScanning electronsSolid electrolyte interfacesTransmission electronZeolitic imidazolate framework-8
ISSN
0378-7753
Abstract
Nitrogen (N)-doped carbon is widely used as an anode material for Li-ion battery (LIB). However, the identification of a specific type of N-configuration responsible for Li-ion storage in N-doped carbon is an elusive topic for LIB. Herein, the N-doped porous carbon nanofibers (N-pCNFs) with various atomic percentages of N and different types of N-configurations are prepared by carbonization of polyacrylonitrile-Zeolitic imidazolate framework-8 fibres at 800, 900, and 1000 °C in N2 atmosphere. The N content of pCNFs-800, N-pCNFs-900, and N-pCNFs-1000 samples are found to be 12.9, 9.4, and 4.8% atomic percentage, respectively. The free-standing/binder-free N-pCNFs-800, N-pCNFs-900, and N-pCNFs-1000 anode electrodes deliver the reversible Li storage capacity of 650, 805, and 520 mAh g−1, respectively at 0.1 C-rate. The ex-situ X-ray diffraction, scanning electron, and transmission electron microscopic results of N-pCNFs-900 indicate the formation of the solid electrolyte interface (SEI) layer. Further, the ex-situ X-ray photoelectron spectroscopy (XPS) analysis of N-pCNFs-900 identifies the presence of LiF, LixPF5-x, LixPOF5-x, Li-O-C, and R-COOLi constituents of the SEI layer and the deconvoluted XPS N1s spectra confirms that the pyridinic-N is responsible for Li-ion storage sites in N-pCNFs. © 2020 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/12657
DOI
10.1016/j.jpowsour.2020.229174
Publisher
Elsevier BV
Related Researcher
  • Author Shanmugam, Sangaraju Advanced Energy Materials Laboratory
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
Files:
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Collection:
Department of Energy Science and EngineeringCMMM Lab(Curious Minds Molecular Modeling Laboratory)1. Journal Articles
Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles
Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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