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Issue 26, 2015
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Porous hollow α-Fe2O3@TiO2 core–shell nanospheres for superior lithium/sodium storage capability

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Abstract

Porous hollow α-Fe2O3@TiO2 core–shell nanospheres for use as anode materials in lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) have been successfully fabricated by a simple template-assisted method, which has been rarely reported before. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N2 adsorption–desorption isotherms reveal that the as-prepared α-Fe2O3@TiO2 is composed of a hollow inner cavity and an outer shell with massive mesopores. This porous hollow structure is capable of buffering the large volume variation of α-Fe2O3 during cycling and preventing the electrode from pulverization and aggregation, as well as providing sufficiently large interstitial space within the crystallographic structure to host alkalis (Li and Na). As a consequence, this hybrid composite exhibits outstanding electrochemical properties, e.g., high specific capacity, excellent cyclability, satisfactory rate performance, and splendid initial coulombic efficiency for both LIBs and SIBs.

Graphical abstract: Porous hollow α-Fe2O3@TiO2 core–shell nanospheres for superior lithium/sodium storage capability

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Publication details

The article was received on 24 Apr 2015, accepted on 21 May 2015 and first published on 09 Jun 2015


Article type: Paper
DOI: 10.1039/C5TA02994E
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J. Mater. Chem. A, 2015,3, 13807-13818

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    Porous hollow α-Fe2O3@TiO2 core–shell nanospheres for superior lithium/sodium storage capability

    Y. Fu, Q. Wei, X. Wang, H. Shu, X. Yang and S. Sun, J. Mater. Chem. A, 2015, 3, 13807
    DOI: 10.1039/C5TA02994E

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