One-pot carbonization synthesis of γ-Fe2O3/Fe/carbon composite for high Li-storage and excellent stability

•One-pot carbonization approach was proposed to prepare γ-Fe2O3/Fe/carbon composite.•The metallic Fe plays an important role in improving the electrochemical properties.•The γ-Fe2O3/Fe/carbon composite shows high capacity and good cycling stability. A novel one-pot carbonization approach was propose...

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Bibliographic Details
Published in:Materials letters 2020-09, Vol.275, p.128066, Article 128066
Main Authors: Ren, Zhimin, Yu, Siqi, Han, Bin, Shao, Zechao, Wang, Zhiyu
Format: Article
Language:English
Subjects:
Carbon
Carbonization
Energy storage and conversion
Extreme values
Iron
Lithium
Lithium-ion batteries
Materials science
Nanocomposites
Rechargeable batteries
Reducing agents
Stability
γ-Fe2O3/Fe/carbon Composite
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Summary:•One-pot carbonization approach was proposed to prepare γ-Fe2O3/Fe/carbon composite.•The metallic Fe plays an important role in improving the electrochemical properties.•The γ-Fe2O3/Fe/carbon composite shows high capacity and good cycling stability. A novel one-pot carbonization approach was proposed to prepare γ-Fe2O3/Fe/carbon composite. The amorphous carbon, which was formed by carbonizing organic ligands, acted as the reducing agent in the formation of metallic Fe under an appropriate temperature. The combination of the amorphous carbon with the metallic Fe greatly enhances the stability and electronic conductivity of the composites, resulting in extremely high-rate capability (640 mAhg−1 at 4000 mAg−1) and outstanding cycling performance (96.7% at 200 mAg−1 after 200 cycles). The γ-Fe2O3/Fe/carbon composite can be considered as a potential high capacity anode for next generation Lithium-ion batteries.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2020.128066