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Issue 51, 2016, Issue in Progress
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The importance of covalent coupling in the synthesis of high performance composite anodes for lithium ion batteries

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Abstract

We present a direct comparison between identical electrostatically and covalently assembled Si–graphene composites for lithium ion battery anodes. The covalent composite is synthesized via amide bond formation between aminated Si nanoparticles and carboxylated graphene using carbodiimide as coupling agent. The composite exhibits 14 times higher reversible capacity retention after 100 lithiation/delithiation cycles in comparison with electrostatically coupled Si–graphene composites. The results indicate that covalent coupling of Si and graphene improves the nanoscale mechanical stability during cycling and improves electrical contact between graphene and Si, thus resulting in higher capacity retention.

Graphical abstract: The importance of covalent coupling in the synthesis of high performance composite anodes for lithium ion batteries

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Publication details

The article was received on 19 Jan 2016, accepted on 03 May 2016 and first published on 04 May 2016


Article type: Communication
DOI: 10.1039/C6RA01571A
Citation: RSC Adv., 2016,6, 45519-45524
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    The importance of covalent coupling in the synthesis of high performance composite anodes for lithium ion batteries

    G. Zeb, P. Gaskell, Y. N. Kim, G. Jalani, X. Xiao, T. Szkopek and M. Cerruti, RSC Adv., 2016, 6, 45519
    DOI: 10.1039/C6RA01571A

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