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Low-valence Bicomponent (FeO)x(MnO)1-x Nanocrystals Embedded in Amorphous Carbon as High-Performance Anode Materials for Lithium Storage

Abstract

Bicomponent transition metal monoxides (BTMMOs) are considered as promising electrode materials due to the fact that they are rich in lower valence states of transition metals. However, BTMMOs are rarely utilized as electrode material for lithium ion batteries. Herein, we report the synthesis of nearly uniform monodisperse bicomponent iron manganese oxide, (FeO)x(MnO)1-x nanocrystals encapsulated in amorphous carbon via a liquid-solid solution and Baeyer’s reagent routes and used them as high-performance anode material for lithium ion batteries. The (FeO)x(MnO)1-x nanocrystals can be obtained by using inexpensive simple iron salt, oleic acid and manganese metal salts as reactants. The interaction of Mn salt via Baeyer’s reagent route induces metal cations in the form of low oxidation states. With the presence of low valence states in the BTMMO electrode, the formation of irreversible Li2O and high initial coulombic efficiency (ICE) can be suppressed for enhancing the electrochemical properties of the electrodes. Density functional theory (DFT) calculations is use to study the electron density redistribution in the BTMMO samples. The optimized bicomponent (FeO)0.198(MnO)0.802 electrode displayed excellent lithium storage performance which is superior to that of (FeO)0.331(MnO)0.669 and MTMO electrodes. This work will not only create opportunity for the synthesis of monodisperse bicomponent transition metal oxides but also their exploration as electrode materials for energy storage devices.

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Publication details

The article was received on 29 May 2018, accepted on 10 Jul 2018 and first published on 12 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA05015E
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Low-valence Bicomponent (FeO)x(MnO)1-x Nanocrystals Embedded in Amorphous Carbon as High-Performance Anode Materials for Lithium Storage

    G. Diao, M. Balogun, S. Tong, X. Guo, X. Huang, Y. Mao and Y. Tong, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05015E

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