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Issue 45, 2015
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A three layer design with mesoporous silica encapsulated by a carbon core and shell for high energy lithium ion battery anodes

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Abstract

A novel C/SiO2 composite with a carbon–silica–carbon (C-mcms) three layer structure was synthesized and evaluated as an anode material for high-energy lithium ion batteries. The C-mcms exhibits an excellent capacity of about 1055 mA h g−1 at a current density of 500 mA g−1 after 150 cycles without detectable decay, and high-rate capability, which is superior to other similar composites without the carbon core or the carbon shell. The results indicate the structural effect on the enhancement of the electrochemical properties: the SiO2 nanoparticles are completely confined between the carbon shell and the carbon core; the two carbon parts work together to keep the structural integrity and to keep the electrode highly conductive and active during cycling, which guarantees high capacity and cycle stability; the interior pores and voids among the SiO2 nanoparticles can provide free space to accommodate the volume change and buffer the volume effect of the electrode during lithiation/delithiation.

Graphical abstract: A three layer design with mesoporous silica encapsulated by a carbon core and shell for high energy lithium ion battery anodes

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Publication details

The article was received on 29 Jul 2015, accepted on 25 Sep 2015 and first published on 28 Sep 2015


Article type: Paper
DOI: 10.1039/C5TA05879A
Citation: J. Mater. Chem. A, 2015,3, 22739-22749
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    A three layer design with mesoporous silica encapsulated by a carbon core and shell for high energy lithium ion battery anodes

    X. Cao, X. Chuan, R. C. Massé, D. Huang, S. Li and G. Cao, J. Mater. Chem. A, 2015, 3, 22739
    DOI: 10.1039/C5TA05879A

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