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Title: Synthesis and characterization of carbon-coated Fe{sub 3}O{sub 4} nanoflakes as anode material for lithium-ion batteries

Graphical abstract: - Highlights: • Carbon-coated Fe{sub 3}O{sub 4} nanoflakes have been synthesized by hydrothermal method. • The nanocomposite electrode shows a large reversible capacity up to 740 mAh g{sup −1}. • The nanocomposite electrode shows promising cycling stability and rate capability. - Abstract: The carbon-coated Fe{sub 3}O{sub 4} nanoflakes were synthesized by partial reduction of monodispersed hematite (Fe{sub 2}O{sub 3}) nanoflakes with carbon coating. The carbon-coated Fe{sub 3}O{sub 4} nanoflakes were characterized by X-ray diffraction, Raman spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and galvanostatic charge/discharge measurements. It has been demonstrated that Fe{sub 2}O{sub 3} can be completely converted to Fe{sub 3}O{sub 4} during the reduction process and carbon can be successfully coated on the surface of Fe{sub 3}O{sub 4} nanoflakes, forming a conductive matrix. As anode material for lithium-ion batteries, the carbon-coated Fe{sub 3}O{sub 4} nanoflakes exhibit a large reversible capacity up to 740 mAh g{sup −1} with significantly improved cycling stability and rate capability compared to the bare Fe{sub 2}O{sub 3} nanoflakes. The superior electrochemical performance of the carbon-coated Fe{sub 3}O{sub 4} nanoflakes can be attributed to the synthetic effects between small particle size and highly conductive carbon matrix.
Authors:
;  [1] ;  [1] ;  [2] ;  [3]
  1. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094 (China)
  2. (China)
  3. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (China)
Publication Date:
OSTI Identifier:
22285214
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 11; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANODES; CARBON; ELECTRIC BATTERIES; ELECTROCHEMISTRY; FERRITES; HEMATITE; HYDROTHERMAL SYNTHESIS; IRON OXIDES; LITHIUM IONS; PARTICLE SIZE; RAMAN SPECTROSCOPY; SCANNING ELECTRON MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION