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Fe Content Effects on Electrochemical Properties of 0.3Li2MnO3•0.7LiMnxNixFe(1-2x)/2 O2 Cathode Materials

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Abstract:

The cathode materials 0.3Li2MnO3•0.7LiMnxNixFe(1-2x)/2O2(0.35≤x≤0.5) were synthesized via low-heating solid-state reaction method. The prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TG) and differential thermal analysis (DTA), and their electrochemical performances were also investigated here. The FESEM images of samples revealed that the particle of Fe-substituted samples became smaller and size distribution got narrower compared with the materials without Fe-doping. The results showed that electrochemical properties of the material depended on the content of Fe. 0.3Li2MnO3• 0.7LiMn0.4 Ni0.4Fe2O2 maintained 99.5% of the reversible capacity after 60 cycles

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Periodical:

Advanced Materials Research (Volumes 347-353)

Pages:

3518-3521

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.347-353.3518

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Online since:

October 2011

Authors:

Dong Li, Fang Lian, Wei Hua Qiu, Fu Shen Li, Kuo Chih Chou

Keywords:

Fe-Substituted, Low-Heating Solid-State Reaction, Positive Electrode Material, Rechargeable Lithium Battery

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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