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Issue 20, 2009
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Ultra-fine porous SnO2 nanopowder prepared via a molten salt process: a highly efficient anode material for lithium-ion batteries

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Abstract

Ultra-fine porous SnO2nanoparticles for lithium ion batteries were prepared by a simple, easily scaled-up molten salt method at 300 °C. The structure and morphology were confirmed by X-ray diffraction and transmission electron microscopy. The as-prepared SnO2 had a tetragonal rutile structure with crystal sizes around 5 nm. The electrochemical performance was tested compared with commercial nanopowder and previously reported nanowires. The as-prepared nanoparticles delivered a significantly higher discharge capacity and better cycle retention. The nanoparticle electrode delivered a reversible capacity of 410 mAh g−1 after 100 cycles. Even at high rates, the electrode operated at a good fraction of its capacity. The excellent electrochemical performance of the ultra-fine porous SnO2 can be attributed to the ultra-fine crystallites (which tend to decrease the absolute volume changes) and the porous structure (which promotes liquid electrolyte diffusion into the bulk materials and acts as a buffer zone to absorb the volume changes).

Graphical abstract: Ultra-fine porous SnO2 nanopowder prepared via a molten salt process: a highly efficient anode material for lithium-ion batteries

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Publication details

The article was received on 01 Dec 2008, accepted on 04 Mar 2009 and first published on 27 Mar 2009


Article type: Paper
DOI: 10.1039/B821519G
Citation: J. Mater. Chem., 2009,19, 3253-3257
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    Ultra-fine porous SnO2 nanopowder prepared via a molten salt process: a highly efficient anode material for lithium-ion batteries

    Z. P. Guo, G. D. Du, Y. Nuli, M. F. Hassan and H. K. Liu, J. Mater. Chem., 2009, 19, 3253
    DOI: 10.1039/B821519G

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