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Issue 24, 2013
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Comparative investigation of the performances of hematite nanoplates and nanograins in lithium-ion batteries

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Abstract

In this work, we selectively prepared two samples with quite different nanocrystal shapes, i.e. nanoplates and nanograins but with almost identical surface areas to make a clear comparison of nanocrystal shapes on electrochemical performance. The electrochemical results indicate that the thinner hexagonal α-Fe2O3 nanoplates considerably enclosed by two larger (0001) basal surfaces exhibit higher capacity and stability than thicker α-Fe2O3 nanograins enclosed by a variety of crystal facets. During the conversion reaction, an orientated growth of porous nanostructure with orientated nanowalls as a stable framework is observed for the nanoplate, readily supplying a pathway for long and easy lithiation–delithiation cycling. The improved electrochemical performance of α-Fe2O3 nanoplates is surely related to the nanostructure with significantly stacked (0001) lattice planes along 〈0001〉 direction for orientated growth of γ-Fe2O3 nanodomains along one 〈111〉 direction.

Graphical abstract: Comparative investigation of the performances of hematite nanoplates and nanograins in lithium-ion batteries

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Publication details

The article was received on 11 Feb 2013, accepted on 26 Apr 2013 and first published on 26 Apr 2013


Article type: Paper
DOI: 10.1039/C3CP50619C
Citation: Phys. Chem. Chem. Phys., 2013,15, 9768-9774
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    Comparative investigation of the performances of hematite nanoplates and nanograins in lithium-ion batteries

    F. Lu, Q. Wu, X. Yang, L. Chen, J. Cai, C. Liang, M. Wu and P. Shen, Phys. Chem. Chem. Phys., 2013, 15, 9768
    DOI: 10.1039/C3CP50619C

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