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Nanostructured 3D porous hybrid network of N-doped carbon, graphene and Si nanoparticles as anode material for Li-ion batteries

Abstract

We report a facile and scalable process to prepare nanostructured 3D porous networks combining graphene, N-doped carbon and silicon nanoparticles (G@Si@C) as performant anode material for batteries. It consists in preparing polymethylmethacrylate particles decorated by Si/graphene oxide and polypyrrole (PPy) in a one-pot process, followed by an appropriate thermal treatment that decomposes PMMA, convert graphene oxide into graphene, and polyppyrole into N-doped carbon. The so-formed electrically conducting 3D porous network containing Si nanoparticles inside the cell walls accommodates the large volume changes of Si during charging/discharging and provides a fast electrolyte penetration/diffusion. Therefore, the designed G@Si@C material presents an excellent reversible capacity of 740 mA h g-1 at a current density 0.14 A g-1 based on the total mass loading of the composite, with more than 99% of coulombic efficiency, high rate capability and good cyclability, suggesting great potential for application as anode materials for lithium-ion batteries.

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Publication details

The article was received on 15 Jun 2017, accepted on 08 Aug 2017 and first published on 08 Aug 2017


Article type: Paper
DOI: 10.1039/C7NJ02154B
Citation: New J. Chem., 2017, Accepted Manuscript
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    Nanostructured 3D porous hybrid network of N-doped carbon, graphene and Si nanoparticles as anode material for Li-ion batteries

    W. Alkarmo, A. Aqil, F. Ouhib, J. Thomassin, D. Mazouzi, D. Guyomard, C. Detrembleur and C. Jerome, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02154B

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