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Issue 15, 2016
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A pinecone-inspired nanostructure design for long-cycle and high performance Si anodes

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Abstract

Inspired by pinecone, here we develop a novel kind of direct chemical vapour deposition (CVD) derived graphene-encapsulated porous Si nanoparticles (NPs) on graphene foam (GF). The CVD derived graphene sheets on the surface of Si NPs are partly overlapped, act as the squamae of a pinecone, preventing the direct exposure to the electrolyte. When the Si NPs expand, a sliding between the graphene layers occurs, providing an effective way to accommodate the volume expansion and stabilize the solid electrolyte interphase. As a result, the pinecone-like graphene-encapsulated Si electrodes exhibit a high capacity of 1600 mA h g−1 at a current density of 2100 mA g−1 after 300 cycles and a capacity higher than 800 mA h g−1 at a current density of 8400 mA g−1.

Graphical abstract: A pinecone-inspired nanostructure design for long-cycle and high performance Si anodes

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Publication details

The article was received on 25 Jan 2016, accepted on 14 Mar 2016 and first published on 14 Mar 2016


Article type: Communication
DOI: 10.1039/C6TA00733C
Citation: J. Mater. Chem. A, 2016,4, 5395-5401
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    A pinecone-inspired nanostructure design for long-cycle and high performance Si anodes

    Y. Xue, J. Deng, C. Wang, R. G. Mendes, L. Chen, Y. Xiao, Q. Zhang, T. Zhang, X. Hu, X. Li, M. H. Rümmeli and L. Fu, J. Mater. Chem. A, 2016, 4, 5395
    DOI: 10.1039/C6TA00733C

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