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Sandwiched graphene inserted with graphene-encapsulated yolk–shell γ-Fe2O3 nanoparticles for efficient lithium ion storage

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Abstract

A convenient and scalable in situ chemical vapor deposition (CVD) method is developed for one-step fabrication of sandwiched graphene sheets which were filled with yolk–shell γ-Fe2O3 nanoparticles encapsulated with graphene shells (YS-γ-Fe2O3@G-GS). Such a unique architecture can be applied to produce an excellent lithium ion battery (LIB) anode. As a result, long-term cycling stability at high rates (a high capacity of 663.7 mA h g−1 is achieved at 2 A g−1 and maintained at approximately 96.6% even after 1500 cycles) and superior rate capability (1173 mA h g−1 at 0.1C, 989 mA h g−1 at 0.2C, 827 mA h g−1 at 0.5C, 737 mA h g−1 at 1C, 574 mA h g−1 at 2C, 443 mA h g−1 at 5C, and 350 mA h g−1 at 10C; 1C = 1 A g−1) can be obtained when YS-γ-Fe2O3@G-GS is used as an LIB anode. As far as we know, this is the best rate capacity and longest cycle life ever reported for an Fe2O3-based LIB anode.

Graphical abstract: Sandwiched graphene inserted with graphene-encapsulated yolk–shell γ-Fe2O3 nanoparticles for efficient lithium ion storage

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Publication details

The article was received on 09 Feb 2017, accepted on 14 Mar 2017, published on 15 Mar 2017 and first published online on 15 Mar 2017


Article type: Paper
DOI: 10.1039/C7TA01239J
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Sandwiched graphene inserted with graphene-encapsulated yolk–shell γ-Fe2O3 nanoparticles for efficient lithium ion storage

    M. Zhang, E. Liu, T. Cao, H. Wang, C. Shi, J. Li, C. He, F. He, L. Ma and N. Zhao, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA01239J

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